Essays on the Microscope / Containing a Practical Description of the Most Improved Microscopes, a General History of Insects, etc., etc.

by George Adams

The colour opake white. From Whitstable: not common.

Nautilus Carinatulus.

Fig. 37. N. oblongus carinatus apertura lineari ovali. The oblong carinated nautilus, with a narrow oval aperture.

The colour whitish, transparent like glass. From Seasalter and Sandwich: very rare.

Nautilus Subarcuatulus.

Fig. 38. N. subarcuatus geniculis exertis. The bending nautilus with raised joints.

The colour opake brown. From Shepey island: very rare.

MYTILUS.
THE MUSCLE.

Mytilus Phaseolus.

Fig. 39. M. lævis valvulis antice inflexis. The smooth muscle, with the valves inflected in front.