A. E. Verrill — North American Oephalopods. 
417 
cephalopods agree with this in lacking a pen. Of such genera, 
Professor Steenstrup has recently [Vidensk. Selsk. Skr., 6 R., nat. 
math. Afd., i, 3, 1881, p. 213] described two: Idiosepius and Sepiada- 
rium, both of which he associates with the Sepidae, because the ventral 
arms are hectocotylized. One of these ( Idiosepius ) has the mantle 
free dorsally, as in Rossia , but with ovate connective cartilages on 
the sides ; the other has a dorsal commissure, as in Sepiola, and 
lateral commissures, much as in Tcionius. To me, these seem more 
nearly allied to Loligo than co Sepia. In addition to these, I have 
to add another genus,* from the Bay of Yeddo, Japan. Of this 
genus I have two species, collected by Prof. E. S. Morse. 
Stoloteuthis Verrill, gen. nov. 
Type, Sepiola leucoptera Verrill. (See p. 347.) 
Body short and thick, well-rounded. Head large, united to mantle 
by a broad dorsal commissure. Eyes large ; pupils round ; eye-lids 
free all around. No pen. Mantle thick, extending farther forward 
* Inioteuthis, gen. nov. Body, lateral fins, and dorsal commissure of the 
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. Eye-lids 
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 hectocoty- 
lized somewhat as in Sepiola Roncleleti (see description by Steenstrup), but more 
extensively, with a large, prominent, fleshy, concave, ear -like structure, near the base, 
extending across the inner surface of the arm. and replacing both rows of suckers, 
their pedicels becoming confluent with the marginal membrane. 
The outer side of this organ is divided by a median notch into two lobes ; the distal 
one enclosing a large papilla, apparently formed of two confluent and modified sucker- 
pedicels. 
Inioteuthis Japonica V. This small species has the suckers in two rows on all the 
arms. It appears to be the Sepiola Japonica D’Orbigny. The suckers of all the arms, 
but especially those of the dorsal and upper lateral arms, are much larger in the male 
than in the female. Tentacular club narrow, with small suckers, in about eight rows. 
The fins are small, nearly semicircular. 
Inioteuthis Morsei V., sp. nov. This is easily distinguished from the preceding by 
the presence of four crowded rows of suckers on all the arms ; the suckers are attached 
by slender pedicels, which arise from the top of prominent, thickened, basal stems. 
The tentacular clubs are well-developed, with exceedingly numerous, very minute 
suckers, in more than sixteen rows. Fins large, situated in advance of the middle of 
the body. Dorsal and ventral arms about equal; two lateral pairs longer, the third 
pair slightly longer than the second. Mantle edge, beneath, with a large etnargina- 
tion ; dorsal commissure broad. 
No males of this species are in the collection : therefore T refer it to this gonus only 
provisional!}'. It has no pen. 
