CEPHALOPODS OF WESTERN NORTH AMERICA. 



273 



Cirroteuthis macrope Berry, 1911. (PI. xxxii, fig. 1-3.) 

 Cirrotcuthis macrope Berry, 1911, a p. 589. 



Animal (so far as known) of rather small size, subgelatinous in consistency. Body somewhat barrel- 

 shaped, fairly elongate, with a short but very broad oar-like fin on either side near the posterior extremity . 

 This fin comprises two portions: A thick, fleshy, and deeply inserted support, terminating outwardly 

 in an acute point, and a delicate membranous margin. Mantle opening full and very wide, reaching 

 to a point just behind each eye and leaving the funnel well exposed (pi. xxxii, fig. i). 



Head wide, flattened, broadly continuous with the body above, no distinct line of demarcation being; 

 visible. Eyes strongly asymmetrical, that of the left side being much the larger, spherical, very large 

 and prominently protruding. Funnel large, broad, well immersed; 

 its integument continuous with that of the head except at the 

 slightly involute tip. Funnel organ very distinct, comprising a 

 small whitish oval pad on either side of the dorsal wall near the 

 apex (pi. XXXII, fig. 3). 



Umbrella and arms very fragmentary in the specimen examined ; 

 web apparently thin and delicate, attached to the arms nearly if 

 not quite to their tips; suckers minute ; cirri arranged as usual but 

 relatively large, having the appearance of long pointed papillae. 



Mandibles black and homy, but not massive. 



Radula present and well developed. The arrangement and 

 shape of the seven rows of teeth are shown in the accompanying 

 figures (text fig. :, and pi. xx.xii, fig. 2). 



Dorsal cartilage not removed, but it appears to be more 

 or less saddle shaped, the posterior lobe rounded above, knob-like, and very prominent. 



Color in spirits a subtranslucent milky white ; the umbrella and scant traces of epidermis remaining 

 on the rest of the body a dark purplish brown. 



Measurements of Cirroteuthis macrope. *> 





Fig. 



Ctrroteuthis macrope. four rows 

 of teeth from radula; camera outline. 



Il30.] 



Total length 



From tip of body to base of umbrella. 

 From tip of body to mantle opening. . 



Extreme width of body 



Width of fin 



Length of fin 



Total width of head 



Width between eyes 



Median length of funnel (ventral) 



Young. 



Type, no. 214317, U. S. National Museum (no. 120 of the author's register). 



Type locality, station 4393, U. S. Fisheries Steamer Albatross, 2113-2259 fathoms, vicinity of San 

 Diego, California; bottom of soft gray mud. Two specimens. 



C. macrope is well characterized by its elongate sliape, the extremely wide mantle opening, and the 

 odontophore. As its reference to the present genus seems positive, it was certainly a surprise to dis- 

 cover the presence of an unmistakable radula, when the family has for years been supposed to lack the 

 organ. I first found it in the smaller of the two specimens, and then surmised that it might prove to be 



a The references of particular importance in tfie synonymy of each species are indicated by bold-face type. 



b Where but one sct-of figures is given in respect to the length of the arras I have chosen for measurement that arm in each 

 pair which for any reason appeared to me to be best preserved or most closely approaching the state which obtains in the living 

 animal. It should be remembered that such data are more approximate than exact, a statement which is notoriously true in the 

 case of the genus Polypus. 



