CRANCHIID A. 29 
Dorsal lamina or pen absent. Cartilaginous support wanting, 
the mantle and siphon being united by a muscular ligament ; 
mantle border joined dorsally to the neck. 
IprosEpius, Steenstrup, 1881. 
Distr.—I. pygmeus, Steenstrup (xxv, 26). Indian Ocean. 
No dorsal lamina or pen, but instead of it there is, under the 
mantle, a singular ring-like tendinous support; cartilage-button 
oval, with corresponding fosset. 
STOLOTEUTHIS, Verrill, 1882. 
Distr.—s. leucoptera, Verrill. Off Martha’s Vineyard, Mass. 
Body short and thick, well rounded; head large, united to 
mantle by a broad dorsal commissure; eyes large, pupils round; 
eyelids free all around; no pen; mantle thick, extending farther 
forward beneath than laterally; fins large, lateral; siphon with 
an internal valve in both sexes; conuective cartilages long, with 
a central groove, fitting a linear ridge on each side of the mantle ; 
arms webbed for more than half their length, except between 
the ventral arms; second pair in the male, and some females, 
with two or three much enlarged suckers near the middle. 
InroreuTuis, Verrill, 1882. 
Distr.—2 sp. Japan. 
Body, lateral fins, and dorsal commissure of mantle as in 
Sepiola; lateral connective cartilages of the siphon oblong- 
elliptical, with the groove open behind, fitting a linear ridge on 
each side of the mantle; eyelids free below, adherent above ; 
pen absent; arms webbed only slightly at base; suckers both 
on sessile arms and tentacles, as in Rossia; left dorsal arm 
hectocotylized. 
Famity CRANCHIID 2. 
Crancuia, Leach, 1817. 
In honor of J. Cranch, naturalist to the Congo expedition. 
Distr.—3 sp. Congo, Africa; West Indies. C. scabra, Leach 
(=xkv5 28). 
Characters generally those of the family. Bodyshort, rounded ; 
fins very small, rounded, terminal; buccal membrane produced 
into eight lobes; arms short, with two rows of suckers; ten- 
tacular clubs finned behind, with suckers in eight rows. Siphon 
valved. 
In C. megalops, the body is joined to the head by a pseudo- 
articulation ; for which Prosch proposes the subgeneric name 
Owenia, 1847. 
