1912.] NATURAL SCIENCES OF PHILADELPHIA. 409 



Euprymna Morsei Steenstrup, 1887a, p. 89 [43]. 



Inioteuthis morsei Ortmann, 1888, pp. 647, 665, pi. 21, fig. 7; pi. 22, fig. 3. 



Inioteuthis Morsei Joubin, lS97o, p. 101 (dimensions, fide Hoyle). 



Inioteuthis Morsei Joubin, 1902, p. 97, figs. 11, 12. 



Euprymna morsei Hoyle, 1904, p. 26. 



Euprymna morsei Hoyle, 1904a, p. 198. 



Euprymna morsei Hoyle, 1905, p. 981. 



not Euprymna morsei Berry, 1909, p. 418 (locality record). 



Euprymna morsei Wulker, 1910, pp. 9, etc., pi. 1, fig. 9; pi. 3, figs. 23, 24; 



pi. 4, fig. 40 (anatomy). 

 Euprymna morsei Naef, 1912, p. 247. 



5 Animal small, sepiolif orm ; body short, thick, rounded, the 

 lateral diameter on the average equal to about three-fourths of the 

 length. Fins large, semicircular, attached very obliquely in- advance 

 of the middle of the body; broadest posteriorly; anterior ]obe 

 conspicuous and abruptly notched at its inner margin so that the 

 attached portion of the fin comprises but about the posterior two- 

 thirds of the total length. Mantle margin projecting well forward 

 ventrally, but with a deep, notch-like emargination just below and 

 encompassing the funnel; united dorsally with the head by means 

 of a very wide commissure, so that the opening of the mantle cavity 

 attains only to a point just back of, and superior to, the eye opening 

 on either side. 



Head almost as broad as the body, the length somewhat exceeded 

 by the width; flattened above; beneath slightly excavated for the 

 reception of the funnel. Eyes very large and prominent, somewhat 

 swollen. Funnel large, very elongate, but in the best preserved 

 specimens not nearly reaching to the margin of the web between the 

 ventral arms; tip with three heavy longitudinal ridges 6 on its interior 

 surface, just back of which on the dorsal wall is a minute triangular 

 valve; general surface of interior transversely ridged. Funnel 

 organ posterior in position, large, tripartite, comprising a broad 

 triangular-hepatiform median pad on the dorsal wall and a pair 



3 Verrill's original diagnosis (1881, p. 417, footnote) is* as follows: 



"Inioteuthis Morsei V., sp. nov. This is easily distinguished from the pre- 

 ceding [/. japonica] by the presence of four crowded rows of suckers on all the 

 arms; the suckers are attached by slender pedicles, 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 emargination; dorsal com- 

 missure broad. 



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

 genus only provisionally. It has no pen." 



I am inclined to consider these ridges a physiological modification attendant 

 upon the conditions of preservation of the specimen furnishing the description. 



