CEPHALOPODS OF THE PHILIPPINE ISLANDS 27 



The funnel is short and stout, united to the ventral surface of 

 the head for most of its length, and has an oval opening. It does not 

 reach to the base of arms IV. The locking apparatus is stout, consist- 

 ing of a raised lappetlike mantle member and a semicircular deep 

 funnel groove. The funnel organ is well developed: a dorsal V-shaped 

 member with stout ventral pads. The valve is large and triangular. 



The head is large, round, and compact, and bears large protruding 

 eyes with conspicuous ventral lids; it is constricted between the eyes 

 and the bases of the arms. There is a single olfactory papilla below 

 each eye. The buccal membrane is seven-pointed and bears no 

 suckers on the points. 



The arms are short and stout, in the order 4.3=2 = 1. All the arms 

 are strongly compressed on the distal half, forming a keel towards the 

 ends. Arm IV is extremely stout and broad at the base and bears a 

 keel for its entire length. There is a well-developed web between the 

 arms except for the ventrals. The arms are thick and stout at their 

 bases but rapidly come to a sharp point. The suckers are in four 

 rows, regularly arranged and of equal size. The horny rings are 

 toothed on the entire margin, the teeth thin and crowded, longest 

 distally, rather minute proximaUy; in many rings the teeth appear 

 fused, forming a paper-thin margin. 



The tentacles are short and stout, slightly squarish in cross-section. 

 The clubs are large, expanded, especially on the ventral side. Dorsally 

 a broad stout web originates at the oral face of the club at a consider- 

 able distance from the sucker-bearing portion and extends to the tip 

 of the club, separated from the suckers by a broad expanse of smooth 

 skin. The sucker-bearing portion of the club is mostly borne on a 

 somewhat elongate semicircular expansion of the club which ventrally 

 and aboraUy is continuous with the club. However, dorsally this 

 section is separated from the club by a deep cleft beneath the sucker 

 bases and becomes deeper proximaUy so that the sucker-bearing sec- 

 tion proximally is a loose flap, united to the stalk only by a thin 

 membrane, the entire posterior half loose and movable. This section 

 is bordered by protective membranes which unite in a point proximally 

 and do not continue onto the stalk. The tentacular suckers are in 

 six or seven rows. Four or five suckers of the second and third rows 

 from the dorsal edge are greatly enlarged; their horny rings bear 

 numerous very small sharp teeth. Distally the club is rounded and 

 there are a few small terminal suckers. 



The specimens before me are mostly smooth except for a few small 

 papillae on the dorsum of the head. Dorsally the color in preservative 

 is a closely mottled purplish black; ventrally it is yellowish. 



635805—62 3 



