16. F. M. Balfour. “On Certain Points in the Anatomy of Peripatus capensis,” Quart. Journ. of Micr. Science, Vol. XIX. 1879.
17. A. Ernst. Nature, March 10th, 1881.
EXPLANATION OF PLATES 46-53[578].
Complete List of Reference Letters.
A. Anus. a. Dorso-lateral horn of white matter in brain. a.g. Accessory gland of male (modified accessory leg gland). at. Antenna. at.n. Antennary nerve. b. Ventro-lateral horn of white matter of brain. b.c. Body-cavity. bl. Blastopore. C. Cutis. c. Postero-dorsal lobe of white matter of brain. c.g. Supra-œsophageal ganglia. cl. Claw. c.m. Circular layer of muscles. co. Commissures between the ventral nerve-cords. co.2. Second commissure between the ventral nerve-cords. co1. 2. Mass of cells developed on second commissure. cor. Cornea. c.s.d. Common duct for the two salivary glands. cu. Cuticle. d. Ventral protuberance of brain. d.l.m. Dorsal longitudinal muscle of pharynx. d.n. Median dorsal nerve to integument from supra-œsophageal ganglia. d.o. Muscular bands passing from the ventro-lateral wall of the pharynx at the region of its opening into the buccal cavity. E. Eye. E. Central lobe of white matter of brain. e.n. Nerves passing outwards from the ventral cords. ep. Epidermis. ep.c. Epidermis cells. F.1, F.2, &c. First and second pair of feet, &c. f. Small accessory glandular tubes of the male generative apparatus. F.g. Ganglionic enlargement on ventral nerve-cord, from which a pair of nerves to foot pass off. f.gl. Accessory foot-gland. F.n. Nerves to feet. g.co. Commissures between the ventral nerve-cords containing ganglion cells. g.o. Generative orifice. H. Heart. h. Cells in lateral division of body-cavity. hy. Hypoblast. i.j. Inner jaw. j. Jaw. j.n. Nerves to jaws. L. Lips. l. Lens. l.b.c. Lateral compartment of body-cavity. le. Jaw lever (cuticular prolongation of inner jaw lying in a backwardly projecting diverticulum of the buccal cavity). l.m. Bands of longitudinal muscles. M. Buccal cavity. M1. Median backward diverticulum of mouth or common salivary duct which receives the salivary ducts. me. Mesenteron. mes. Mesoblastic somite. m.l. Muscles of jaw lever. m.s. Sheets of muscle passing round the side walls of pharynx to dorsal body-wall. od. Oviduct. œ. Œsophagus. œs.co. Œsophageal commissures. o.f.g. Orifice of duct of foot-gland. o.j. Outer jaw. op. Optic ganglion. op.n. Optic nerve. or.g. Ganglionic enlargements for oral papillæ. or.n. Nerves to oral papillæ. or.p. Oral papillæ. o.s. Orifice of duct of segmental organ. ov. Ovary. P. Pads on ventral side of foot. p. Common duct into which the vasa deferentia open. p.c. Posterior lobe of brain. p.d.c. Posterior commissure passing dorsal to rectum. p.f. Internal opening of nephridium into body-cavity. ph. Pharynx. pi. Pigment in outer ends of epidermic cells. pi.r. Retinal pigment. p.n. Nerves to feet. p.p. Primary papilla. pr. Prostate. R. Rectum. re. Retinal rods. R. m. Muscle of claw. s. Vesicle of nephridium. s1. Part of 4th or 5th nephridium which corresponds to vesicle of other nephridia. s.c.1. Region No. 1 of coiled tube of nephridium. s.c.2. Region No. 2 of ditto. s.c.3. Region No. 3 of ditto. s.c.4. Region No. 4 of ditto. s.d. Salivary duct. s.g. Salivary gland. sl.d. Reservoir of slime gland. sl.g. Tubules of slime gland. s.o.1, 2, 3, &c. Nephridia of 1st, 2nd, &c., feet. s.o.f. Terminal portion of nephridium. s.p. Secondary papilla. st. Stomach. st.e. Epithelium of stomach. sy. Sympathetic nerve running in muscles of tongue and pharynx. sy´. Origin of pharyngeal sympathetic nerves. T. Tongue. t. Teeth on tongue. te. Testis. tr. Tracheæ. tr.c. Cells found along the course of the tracheæ. tr.o. Tracheal stigma. tr.p. Tracheal pit. ut. Uterus. v.c. Ventral nerve cord. v.d. Vas deferens. v.g. Imperfect ganglia of ventral cord.
Plate 46.
Fig. 1. Peripatus capensis, x 4; viewed from the dorsal surface. (From a drawing by Miss Balfour.)
Plate 47.
Fig. 2. A left leg of Peripatus capensis, viewed from the ventral surface; x 30. (From a drawing by Miss Balfour.)