6. Krohnia hamata (vide p. [194]).
7. Spadella maxima Con. Length, 5.2 cm.; hooks, 6; anterior spines, 3-5; posterior spines, 5-7; epidermal thickenings round the neck.
8. Spadella draco (vide p. [194]).
9. Spadella schizoptera[[612]] Con. An opaque, yellowish-brown species living among algae. Length, 4 mm.; hooks, 8; anterior spines, 4-6; posterior spines wanting. Caudal segment occupies one-half the body length.
Professor Verrill states that the name S. gracilis (vide p. [191]) was due to a clerical error, the species really referred to being S. elegans.
A. E. S.
CHAPTER INDEX
Every reference is to the page: words in italics are names of genera or species; figures in italics indicate that the reference relates to systematic position; figures in thick type refer to an illustration; f. = and in following page or pages; n. = note.
Acanella, as host, [298]
Acanthobdella, [395]