44 U.S. NATIONAL MUSEUM BULLETIN 234 



99, ML 12.0-14.0 mm., Sta. D5412, off Lauis Point, between Cebu 

 and Bohol in 297 m., green mud, bottom temp. 54.8° F, Mar. 23, 1909; 

 USNM 575346. 2 cf cf , ML 16.0-23.5 mm, 2 99, ML 16.0-17.0 mm, 

 Sta. D5523, off Point Tagolo Light, northern Mindanao, Aug. 10, 

 1909; USNM 575345. 



Description. — Twelve specimens of this species were found in the 

 collections. Hitherto known only from the Japanese Islands and their 

 vicinity, the present record extends their range southward. 



The mantle is short, saccular, and bluntly rounded posteriorly. 

 In cross-section it appears square due to dorsoventral flattening. 

 The mantle is united to the head in the nuchal region by a narrow 

 band, but in most of the specimens a slight fold or crease obscured 

 the attachment and gave instead the appearance of a free mantle. 

 Ventrally the mantle is longer, reaching almost beyond the eyes on 

 each side but shghtly emarginated immediately below the funnel. 

 The entire ventral surface forms a shelf or shield below, the mantle 

 here being thicker and pigmented. It has a ghstening or irridescent 

 purple sheen which contrasts strongly, except in poorly preserved 

 specimens, with the color of the remaining area. 



The funnel is almost entirely covered by the ventral shield and only 

 the extreme end or orifice projects beyond the mantle. The funnel 

 organ is broadly V-shaped with a slender terminal papilla. The 

 ventral pads are slightly arcuate, narrow anteriorly but wide 

 posteriorly. 



The fins are large, originate in the middle of the mantle, and do not 

 project beyond the margin; they are semicircular, with a large free 

 anterior lobe. Apparently they are unpigmented. 



The head is broad, compact, with prominent eyes. The eyehds 

 are well developed dorsally and ventrally and there is even a pseudo- 

 sinus in the anteroventral border. There is a small rather prominent 

 olfactory papilla posterior to each eye. 



The arms are short and have the average order of 3.2.1.4, but they 

 are nearly subequal; variation in the order of the arms is so great that 

 it cannot be used as a diagnostic character. The web is subequal in 

 the females and extends about a third up the arms. In the males the 

 web is much deeper in sector A between the dorsal arms, covering 50 

 percent or more of the arms. The arms are all without keels except 

 III which is keeled for the distal two-thirds. There are no protective 

 membranes. The suckers are biserial and are nearly spherical with 

 small apertures bearing smooth rings. In the females, about 22 pairs 

 of small suckers extend over the entire arm, largest in the middle but 

 decreasing gradually in either direction. In the male, the dorsal pair 

 of arms is hectocotylized by being somewhat enlarged and swollen 

 and equipped with about 19 pairs of small suckers deeply set in the 



