314 REPORT OF NEW JERSEY STATE MUSEUM. 



entirely wanting. Abdominal appendages of moderate length, 

 exopodite longer than endopodite, either foliaceous or slender. 

 In first pair no endopodite present, but in male replaced by a 

 "petasma" or "andricum" which usually well pleated and some- 

 times convoluted. In second pair endopodite in male carries 

 little fleshy scale at its base. No podobranchise present on any 

 legs. Pleurobranchiae present on all, or all but last one or two 

 of last seven thoracic somites. 



Alcock restricts or indicates Pencuus caramote Risso as the type 

 of Penaeus, ^ but this action is invalid as the only species included 

 in the original account by Fabricius are : monodon, monoceros 

 3.nd p lank ornis.- If no other action has been made the first species 

 (monodon) may be considered the type, as suggested by Steb- 

 bing. 



Pencuus longirostris Lucas may be identical with Pencens 

 membranaceus Heller, and therefore Alcock's designation of the 

 latter as the type of Parapenceus is valid. 



Unless Penceus kroyeri Heller is identical with Xiphopeneus 

 harttii S. I. Smith, Alcock's designation is useless, as in any case 

 Xiphopenetis is monotypic. 



Key to the Species. 



a. Parallel grooves along each side of median keel usually persist nearly to 



hind end of carapace ; flagella of antennje long. brasiliensis 



aa. Parallel grooves along each side of median keel usually extend only to 



middle in length of carapace; flagella of antennae usually short, setiferus 



Penasus brasiliensis Latreille. 



Brazilian Prawn. 



Penceus brasiliensis Latreille, Nouv. Diet. Hist. Nat., XXV, 1817, p. 156. 



Coasts of Brazil. 

 Stimpson, Ann. Lye. Nat. Hist. N. Y., X, 1871, p. 132. Somers Point, 



New Jersey. (Sing Sing, New York.) 

 ■ S. L Smith, Rep. U. S. F. Com., I, 1871-72 (1873), P- 55i- Croton 



River at Sing Sing, N. Y., to Brazil. 



' Cat. Crust. Ind. Mus., 1901, p. 14. 



