416 PROCEEDING!^ OF THE NATIONAL MUSEUM. vol.37. 



Head very short and broad, projecting but slightly beyond the 

 mantle. Eyes prominent, with a protruding lens. Funnel short, 

 broad, projecting considerably beyond the mantle, ventrally flexed 

 near the tip. 



Sessile arms short, very unequal; order of length, 3, 4, 2, 1; the 

 third pair much the longest, the second and fourth nearly equal; 

 suckers extremely minute, pedunculated, arranged in two series of 

 six (dorsal arms) to thirteen (third pair) each; horny rings appa- 

 rently smooth; arms webbed, the umbrella extending for about 

 one-half the length of the dorsal arms, but absent between the ven- 

 tral arms and between these and the third pair. 



Tentacles rather stout, much thicker than the sessile arms, almost 

 equal in length to the mantle; club little thickened, tapering to a 

 rather blunt point, furnished with a narrow lateral membrane, and 

 bearing four rows of minute, closely crowded, pedunculate suckers, 

 largest at the center of the club and becoming exceedingly minute 

 toward either end; suckers of two of the rows much reduced j)roxi- 

 mally and continuing down the stalk for about two-thirds of its 

 length in two widely-spaced alternating rows; aperture of suckers 

 small, with a smooth horny ring. 



Gladius not examined. 



Color of preserved specimens a semitranslucent grayish white. 

 Chromatophores distributed over the anterior portion of the mantle 

 and extending in two rows along each tentacle, largest and most 

 prominent on the anterior ventral surface of the mantle, where they 

 are grouj)ed in irregular rows to form a rough semicircle. 



Length, excluding tentacles 26 mm.; length of mantle 22 nun.; 

 width of mantle 19 mm.; length of tentacles 19 mm. 



The type was taken from the plankton at station 3878, south of 

 the island of Lanai, and west of the island of Kahoolawc. 



A second smaller specimen was obtained at the same station, and a 

 third, also from the plankton, is from station 4009, between the islands 

 of Kauai and Onhu. These agree in all essentials with tiie type. 



The present form undoubtedly exhibits close relationship to C. rein- 

 lianJtii Steenstrup, but a number of characters above noted, chief of 

 which, perhaps, is the extreme rotundity of the body, serve to dis- 

 tinguish them. Lonnberg'' has considered rotundity to be merely an 

 immatiu'c condition of C. reinhardtii, the latter being quite loligini- 

 form wlien adult. However, the largest Albatross specimen is no 

 less spherical than the smallest, and all are vastly more globular than 

 any figures of C. reinhardtii, immature or otherwise, which I have 

 seen. Nevertheless it is possible that a larger amount of material 

 and a more extended knowledg-e of the limits of variation of these 

 rare forms may indicate that the two are but extremes of one species. 



"Lounberg, Notes on some rare Ceplialopods, p. 611, Stockholm, 1896. 



