No. 2310. NEW CEPHALOPODS FROM THE PACIFIC— SASAKI. 201 



Station 4797 (Starichkof Island, Kamchatka). One specimen. Cat. 

 No. 332927, U.S.N.M. 



Of the two specimens listed above the first is an adult of 270 mm. 

 mantle length and the second is a young of 109 mm. mantle length. 

 The former specimen is far larger than the original and differs in 

 many respects from Joubin's description. The head is small, being 

 far narrower than the body and resembles at a glance that of the 

 higher oegopsids. It is a roughly three-sided prism, one side rep- 

 resented by the dorsal surface, and the other two by the lateral 

 surfaces. The dorsal surface is not evenly flat but depressed in the 

 middle, the depression defined behind by a prominent nape. The 

 ventral surface is represented merely by an edge of the prism although 

 it is not sharply brought to an angle. It has a groove along its 

 crest, marked off by stiff ridges from the lateral surfaces. The 

 groove widens posteriorly, where it is occupied by a large bundle of 

 the funnel adductors so that it shows no real concavity. The eyes 

 are extensively covered with the eyelids, the eye-openings being 

 small, and triangular. The protective membranes are largely oblite- 

 rated between the trabeculae, so that these are converted into slender 

 cirrif orm appendages which much recall the cirri of the Cirroteuthidae. 



Genus TAONIUS Steenstrup. 



59. TAONIUS PAVO (Lesueur). 



Loligopsis pavo F^russac and d'Orbigny, Cephalopodes acetabulif^res, 1839, 

 p. 321, Calmars, pi. 6, figs. l-3a, b; Loligopsis, pi. 6, figs. 1-3 (5, 5bis, 6). 



Taonius pavo Joubin, Princess Alice Cephalopoda, 1900, p. 108, pis. 8, 9, pi. 10, 

 figs. 7-9; pi. 15, fig. 16.— Ppepfer, Nordisches Plankton, 1908, p. 102, figs. 117, 

 118; Plankton-exped. Cephalopoda, 1912, p. 704. 



Station 4906 (near Koshiki Island, Kiushiu). Two fem.ales. Cat. 

 No. 332946, U.S.N.M. 



These two specimens measure 330 mm. and 179 mm. in mantle 

 length respectively and well agree with Joubin's description. 



Genus MEGALOCRANCfflA Pfeffer. 



60. MEGALOCRANCHIA MAXIMA Pfeffer. 



Megalocranchia maxima Pfeffer, Abhandl. Naturwiss. Vereins, Hamburg, vol. 8 

 (pt. 1), 1884, p. 24, figs. 32, 32a; Plankton-exped. Cephalopoda, 1912, p. 712, 

 pi. 48, figs. 1^. 



Station 4917 (west of Oshima Group, Kiushiu). One specimen. 

 Cat. No. 332928, U.S.N.M. 



This specimen is larger than the type, measuring 63 mm. in mantle 

 length. Disagreeing with Pfeffer's description, the fins are only little 

 auricuiated in the anterior origin, and the protective membrane is 

 obliterated between the trabeculae at the distal parts of arms. 



