130 U.S. NATIONAL MUSEUM BULLETIN 234 



Paratype.— 1 9, ML 101.0 mm., Sta. 5135, 11 miles off Jolo Light, 

 Jolo Id., fine coral sand, 294 m., Feb. 7, 1908; USNM 575452. 



Description. — Two females of an ommastrephid squid, consider- 

 ably varying in size, were found in the collections, bat no males were 

 obtainable. The specimens have certain characters not shared 

 in toto by other known species ; they are placed with some hestitation 

 in a new subspecies. 



The mantle is heavy, thick, and muscular, with a sinuous margin, 

 somewhat pointed dorsally and shallowly excavated beneath the 

 funnel. The anterior two-thirds is cylindrical and nearly straight 

 sided, but at about the level of the fins it tapers with concave sides to 

 a narrow posterior point. 



The fins are small, wider than long, convex on the anterior margin 

 and concave on the posterior margin, the anterior lobes free. In the 

 large female, the posterior part of the fin was cut away at some time, 

 leaving a symmetrical indentation. 



The funnel is stout and compact, deeply set into the funnel groove. 

 The locking apparatus is an inverted T-shape, with a deep median 

 pit and longitudinal groove. The mantle member is composed of a 

 prominent longitudinal ridge which is club shaped posteriorly and 

 narrow anteriorly, with the transverse ridge somewhat pointed pos- 

 teriorly. The funnel organ is a sharply inverted V-shape with oval 

 ventral pads. 



The head is stout, as broad as the mantle, and deeply excavated 

 ventraUy for the funnel. The posterior margin of the head is clearly 

 delimited by a sharp ridge. Dorsally, in the midline, this ridge is 

 shallowly V-shaped with an angle of about 120°. There are three 

 large olfactory crests, one dorsal, one lateral, and one ventral, of which 

 the dorsalmost is the largest. The eyelid is large and bears a deep dis- 

 tinct sinus on the anteroventral border. The funnel gi'oove is sharply 

 defined by a distinct border. Anteriorly it has a smaU foveola, 

 halfmoon-shaped, which bears a number of longitudinal folds. There 

 are no side pockets. The nuchal cartUage is long and slender pos- 

 teriorly but broadly expanded anteriorly. The double parallel ridges 

 are surrounded by a narrow round border in the swollen anterior end. 



The arms are of medium length, unequal, in the order 2.3.1.4. 

 Arms II, III, and IV are keeled. III with a deep triangular swimming 

 membrane. I is keeled only on the basal section, all the keels 

 being on the outer ventral border rather than on the middle of the 

 arms. The suckers are biseriaUy arranged, the dentition varying 

 in shape and number of teeth from base to tip. 



