NATURAL SCIENCES OF PHILADELPHIA. 425 



species in the paper cited. It has been reported from Shumshu 

 Island, Kurile Group, by Middendorff, and from Japan without 

 more definite locality by Steenstrup. It probably inhabits the 

 whole northern part of the archipelago. 



Family ENOPLOTEUTHID^S Pfeffer, 1900. 

 Sub-family ENOPLOTEUTHIN^ Chun, 1910. 



- Genus ABRALIOPSIS Joubin, 1896. 

 Abraliopsis scintillans Berry, 1911. Pis. VII, VIII; pi. IX, figs. 1-6. 



? Abraliopsis sp. Nishikawa 1906a, p. 310 (eggs). 

 Abraliopsis scintillans Berry 191 la, p. 93. 



Animal small, loliginiform; the mantle thin, cylindrical in front; 

 slender and tapering rapidly to an acute point posteriorly. Fins 

 very large, broadly sagittate, over three-fifths as long as the mantle, 

 their total width at the point of greatest expansion about the same 

 as the length; forward margins arcuate, descending abruptly inward 

 from a nearly right angle anteriorly; angles of lateral margins 

 rounded, a little less than right, well anterior of the middle; hinder 

 margins concave, produced posteriorly to an acute point. Anterior 

 mantle margin slightly produced to form an obtuse median point 

 above and a lateral angle on either side of the funnel. 



Head large, flattened, excavated beneath. Eyes enormous, 

 rounded and frequently much protruding in preserved specimens; 

 ocular apertures large, with a distinct sinus in front. Funnel broad, 

 compressed, little projecting; interior with a pocket-like valve near 

 the tip; funnel organ comprising a large A-shaped median pad, with 

 notably expanded limbs posteriorly situated on the dorsal wall, 

 and two ovate ventro-lateral cushions (PI. IX, fig. 5). 



Each funnel-locking cartilage a large elongate-ovate plate, deeply 

 excavated down the centre, the elevated margin conspicuously 

 reflected, its cavity corresponding with a simple linear groove about 

 8 mm. long on the inner surface of the mantle. 



Arms of moderate length, nearly equal, the order of length in 

 general 4, 3 = 2, 1, though the third pair is sometimes a little longer 

 than the second. In detailed structure the arms differ considerably; 

 for the sake of more accurate observation, v those of the left side of 

 one specimen were removed and have furnished the following account. 

 Dorsal arm armed with 12 small stout hooks in two alternating 

 rows, replaced by numerous minute suckers in two series at the 

 extremity; on the outer margin along the whole length, except at the 

 extreme base, is a broad colorless keel, widest below the middle of 

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