CEPHALOPODS OF THE PHILIPPINE ISLANDS 41 



Description. — The species was first described by Sasaki (1920) 

 on the basis of a single immatm-e female of 19 mm. ML, from 131 

 fms. in Sm'uga Bay, Japan (Albatross). The present specimen is 

 apparently a matm^e female although not bearing fully developed 

 eggs. 



The mantle is longer than broad, somewhat tubular, with a rounded 

 posterior end. The dorsal mantle margin is slightly produced and 

 the ventral margin is hollowed out. 



The fins are large, four-fifths of the mantle length, with the anterior 

 lobes free. The anterior fin margin almost reaches the anterior mantle 

 margin. The fins are about half as wide, individually, as they are 

 long. 



The head is large, broader than the mantle, with prominent large 

 eyes which have crescentic lower lids. The web is low and poorly 

 developed, and is lacking entirely between arms IV. 



The funnel is of moderate length, conical, projecting only slightly 

 beyond the ventral margin of the mantle. The funnel organ is not 

 clearly discernible in this specimen but enough can be seen to deter- 

 mine the general outline. The dorsal pad is pointed anteriorly and 

 has a long slender papilla at the apex. The sides are rounded and 

 strongly shouldered. The ventral pads are oval with an anterior 

 point. The valve is situated near the mouth of the funnel. The 

 funnel cartilage is about twice as long as broad, deep, with thickened 

 borders. The anterior end is rolled inward slightly. The lateral 

 adductors are strongly developed. 



The arms are long, differentiated, in the order 3.2.1.4. The 

 longest is about four-fifths the dorsal mantle length. The arms are 

 all somewhat damaged, and all the suckers are missing except for a 

 few at the base of the arms. The basal suckers are large, round, and 

 have very small apertures. The dorsal and lateroventral arms bear 

 low but distinct keels. 



The tentacles are of moderate length, somewhat compressed, and 

 grooved on the oral surface. The club is only slightly expanded, 

 rather long, and so coiled upon itself that all measurements are im- 

 possible. A low dorsal membrane originates in the carpal region and 

 extends along the full length of the club. The club itself is so folded 

 that it gives the impression of being round. The suckers are very 

 minute with small apertures. The exact number of suckers in a 

 row across the club was exceedingly diflicult to ascertain. Sasaki 

 gives 24 rows but the present specimen appears to have about 30, 

 The nature of the chitinous ring of the aperture was not discernable. 



A pair of large papilliform organs of unknown function, one on each 

 side of the rectmn, is located just posterior to the opening. The pair 



