PEREZ FARFANTE: DIAGNOSTIC CHARACTERS IN HEPOMADUS 



c 



Figure 5. — Hepomadus tener. A. Dorsal view of left second maxilla, ^ 51 mm c.l., off Atlantic City, N.J. B. Distalmost 

 part of upper side of left endite, same specimen. C. Lower side of same endite. Hepomadus glacialis Bate, holotype, 

 ^ 65 mm c.l., near Yokohama, Japan. D. Distalmost part of upper side of endite of left second maxilla. E. Lower side 

 of same endite. 



laterally forming short, sinuous projection; 

 articular sclerite produced proximomesially 

 into strong, subrectangular spur situated im- 

 mediately distal to large, platelike, mesially 

 directed projection of basis of pleopod. 



Appendix masculina (Figure 7A, B) broad, 

 subfoliaceous, bearing long marginal setae on 

 distal portion and secondary row along short 

 rib, latter delimiting dorsal extremity of ven- 

 trally inclined distomesial portion of appendix. 

 Appendix interna narrow, elongate, gently 

 tapering distally to rounded extremity, and 

 extending almost as far as, or somewhat beyond, 

 appendix masculina. 



Sternite XIII in males bearing lanceolate, 

 median plate; sternites VIII through XII with 

 high median ridge produced anteriorly into 

 acute spine in males as well as in females. 



Thelycum (Figure 8) with median plate on 

 sternite XIII very elongate, reaching between 

 midlength and anterior margin of sternite XII, 

 roughly lanceolate, with gently undulate, or 

 irregular, lateral margins, and rather abruptly 

 tapering anteriorly forming usually obtuse, 

 occasionally acute, triangular projection; ster- 

 nite XIV weakly convex ventrally, convexity 

 often embraced posteriorly by semicircular 

 groove. 



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