A. JSJ. Verrill — North Anie7'ican Oephalopoch. 417 



cephalopods agree with this in lacking- a pen. Of such genera, 

 Professor Steenstvup has recently [Vidensk. Selsk. Skr., 6 R., nat. 

 math. Afd., i, 3, 1881, p. 213] described two: IcUosepias and Sepiada- 

 riutii, both of which he associates with the Sepidse, because the ventral 

 anus are hectocotylized. One of these [Idiosejniis) has the mantle 

 free dorsally, as in JRossia, but with ovate connective cartilages on 

 the sides ; the other has a dorsal commissure, as in Sepiola, and 

 lateral commissures, much as in Taonias. 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 leucopkra Yerrill. (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 

 tlie 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 Bossia. Left dorsal arm hectocoty- 

 lized somewhat as in Sepiola Rondeleti (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 mucli 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 distiuguished 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, wiih a large emargiua- 

 tiou ; dorsal commissure broad. 



No males of this species are in the collection ; therefore I refer it to this genus only 

 provisionall}'. It has no pen. 



