158 Bulletin, Vanderhilt Marine Museum, Vol. II 



prominent, and the anterolateral teeth are wider, obtuse and with the 

 margins more arcuate than those of ornatus. The carapace is mod- 

 erately convex ; the areolations well defined ; granulations coarse ; the 

 frontal teeth four, the inner pair small ; the outer pair well developed ; 

 there are eight anterolateral teeth well separated by deep sinuses ; the 

 first four teeth are obtuse, the remainder more acute; the second to 

 fifth teeth, inclusive, each have their posterolateral margin convex. 

 The lateral spine is acute, 2.5 times as long as the preceding spine; 

 there is a finely beaded carina running inward from this tooth onto 

 the branchial region. 



The chelipeds have the anterolateral margins of the merus armed 

 with three or four acute spines ; occasionally one, blunted at the pos- 

 terolateral distal angle of the merus ; the propodus has one prominent 

 acute tooth proximally at the base of the outer costa of the upper face 

 and a small tooth at the distal end of the inner costa of the upper 

 surface above the base of the dactyl. All the costae of the propodus 

 are prominent, composed of medium-sized granules. 



The second, third and fourth legs are slender, typically Callinecies; 

 the fifth legs with thickened ischium, merus and carpus ; the propodus 

 and dactyl laminate. 



Synonymy. — Callinectes larvatus Ordway, Journ. Boston Soc. Nat. 

 Hist., VII, p. 573, 1863.— S. I. Smith, Trans. Conn. Acad. Arts 

 and Sci., vol. 2, p. 9, 1869. — Kathbun, Proc. U. S. Nat. Mus., vol. 

 18, p. 358, pi. 17, pi. 24, fig. 5, pi. 25, fig. 4, pi. 26, fig. 4, pi. 27, 

 fig. 4, 1895.— Rankin, Ann. N. Y. Acad. Sci., vol. XI, p. 232, 1898. 



Callinectes marginatus Rathbun, Proc. Biol. Soc. Wash., vol. XI, p. 

 149, 1897 ; Bull. U. S. Fish. Comm., vol. 20, pt. 2, p. 48, 1901. 



Callinectes marginatus var. larvatus Verrill, Trans. Conn. Acad. Arts 

 and Sci., vol. 13, p. 368, text fig. 22b, pi. 18, fig. 1, 1908. 



Grenus : PORTUNUS Weber. 



Subgenus: Portunus Rathbun. 



Portunus (Portunus) sulcatus A. Milne Edwards. 



Plate 54. 



Name : Red-finny crab. 



Diagnostic characters : Carapace convex, with anterolateral second, 

 fourth, sixth and eighth teeth smaller than those alternating; lateral 



