172 Bulletin, Vanderhilt Marine Museum, Vol. II 



Portunus marmoreus Leach, op. cit., pi. 8. — H. Milne Edwards, op. 

 cit., p. 442. — Bell, op. cit., p. 103. 



Portunus lividus Leach, Malacos. Podophth. Brit., pi. IX, figs. 3 and 

 4 and related text, 1815. 



Portunus marmoreus E. L. Bouvier, Results Campagnes Seientifiques 

 par Prince de Monaco, Fasc. XXII, p. 59, 1922. (Under this 

 species Prof, Bouvier states that it is identical with Portunus 

 holsatus Fabr. It is of interest to note that Bell, in 1853, made 

 the same decision.) 



Subgenus: ACHELOUS DeHaan. 

 Portunus (Achelous) gibbesii (Stimpson). 



Plate 59. 



Name : This species was named in honor of Lewis R. Gibbes, one of 

 the first American carcinologists. 



Diagnostic characters : A small species ; earpace oval, lateral spine 

 prominent; two or more silvery spots on each side at the base of the 

 anterolateral teeth. Rostral teeth four small, subequal, the inner pair 

 weaker than the outer ; the preorbital teeth weakly bifid. The merus 

 of the swimming legs has a row of acute spines on its posterior distal 

 edge. 



Type: Professor Stimpson 's type material was "found on the coast 

 of South Carolina by Captain Kurtz, and at St. Augustine, Florida, by 

 Mr. Dorman. These specimens were deposited in the U. S. National 

 Museum. 



Distribution: From off Cape Hatteras, N. C, off Fort Macon, 

 Georgia ; Egmont Key, Fla., West Florida and Cuba. 



Material examined : Two males and two females taken in dragnet, 

 Guantanamo Bay, Cuba, January 17, 1928, by the "Ara,'' William K. 

 Vanderbilt, commanding, establish the first Cuban record for the spe- 

 cies and substantially extend its southern range. 



Technical description : A small species. Dorsal surface olivaceous 

 green with silvery flecks. Carapace slender, oval, 18 mm. long, 44 mm. 

 wide from tip to tip of lateral spines ; frontal margin with four teeth 

 besides the preorbital ; the submedian pair of teeth are much smaller 

 than the lateral pair, which form broad triangles and are separated 



