CEPHALOPODA. — BERRY, 



247 



Fig. ^iK- Loligo ethetidgei ^ [490], 

 camera drawing of mandibles. 



part 



Mandibles shoAvn in Fiu. 37. 



Baduh (Fig. 38*) 

 showing rhachidian 

 teeth each with large 

 conical, clown- 

 curved, central 

 cnsps and a small, 

 triangular, marginal 

 cusp on each side ; 

 first laterals with 

 large, conical, 

 central cusps and 

 a small, conical 



cusp on the outer margin, the inner margin more or less 

 produced but not cusped, so that thej^ much resemble 

 broken rhachidian teeth in shape as Avell as in size if 

 allowance be made r- — -j 



second laterals larger^ ^^AJ^ V^//^/ 

 comprising a broad, (f / 



rapidly tapering knife- 

 like blade, springing 

 from a base shaped 

 like an inverted 

 chapeau ; marginals 

 with inconspicuous 

 bases, but their slender, 

 talon-shaped blades 

 largest of all. 



0.5 1 



Fig. Zl.—Ix)ligo etheridgei J [49()J, teeth 

 of one side of one row of radula of paratype ; 

 camera drawing from a mount in balsam. 

 Additional views given below of a rhachidian 

 and first lateral tooth. 



Gladiusf (Fig. 36) strongly convex, the wings relatively 

 compressed toward one another, so that in situ the outline 

 appears much narrower than shown in the figiu'e ; anterior 

 projection of rhachis relatively short and wide, tapering 

 rapidly between the wings which originate from it rather 

 abruptly ; wings with a strong thickening for most of their 

 length, but this is not marginal ; midrib much darker than 

 remaining portions. 



* Unfortunately, in the specimen chosen for mounting the margins of 

 the radula were so much curled inward that it had to be more or less 

 torn apart before it could be drawn. As a consequence it is not certain 

 that all the teeth shown in the figure belong in exactly the same transverse 

 series, though all are taken from that region of the organ where the teeth 

 are best developed and from as nearly the same horizontal level as possible. 



fThe gladius of the type, which is that described, was found to be badly 

 broken. That of the paratype had been removed before the specimen, 

 came into my hands. 



