Decapod Crustacea of Bermuda, Part II. 45 



Yale Mus. coll., t. S. I. Smith) ; off U. S. Coast, Albatross sta. 

 2606, 1885, in 25 fathoms (S. I. Smith) ; Maceio, Brazil (M. J. 

 Rathbun) ; Florida (Stimpson). 



This species resembles Parapciiaus I'clntinus (Dana, sp.) and 

 may, perhaps, be the species recorded under the latter name by 

 Mr. W. Stone (coll. Heilprin).* 



It differs from Dana's species (see below and figures) in having 

 the second and third pairs of legs decidedly unequal, the third 

 pair being much longer, instead of subequal ; and in having the 

 fourth pair much shorter than the fifth, instead of subequal ; also 

 in having the telson armed with longer spiniform lateral processes 

 and movable spines ; and in some other details. 



Prof. Sidney I. Smith (op. cit.) gave a very full description of 

 this species with detailed measurements of a specimen from 

 Bermuda (coll. G. B. Goode), which must be considered the type 

 (see our pi. xvi, fig. 3). 



M. -Edwards and Bouvier described later a much smaller and 

 more slender specimen under the same name, with good figures. 

 This seems to me to be a distinct variety. (See our pi. xv, figs. I, 

 A-A iv, ia.) From lat. 24 43'N., in 37 fathoms, Blake Expedition. 

 It differs in various details as shown by the figures. 



Trachypenaeus Alcock, 1901. 

 Parapenaus (pars) Smith, Proc. U. S. Nat. Mus., vol. viii, p. 171, 1885; 



Annual Report U. S. Com. of Fish and Fisheries for 1885, p. [80], 



1886. 

 Trachypcncus Alcock, Ann. and Mag. Nat. Hist., Ser. 7, vol. xvi, p. 



523, 



This genus is separated from Penaus and Parapenaus mainly 

 by lacking pleurobranchiae on the fourth and fifth pereopods and 

 by the presence of exopodites on all the legs. The flagella of the 

 antennae are shorter than in the allied genera. 



Trachypenaeus constrictus (Stimp.) Edw. and Bouv. 

 Penaus constrictus Stimpson, Ann. Lye. Nat. Hist. N. Y., x, 135, 1871. 



Kingsley, Bull. Essex Inst, x, p. 69; Proc. Acad. Nat. Sci. Philad., 



1878, p. 330; Am. Naturalist, xxxiii, p. 719, 1899. 

 Parapenaus constrictus Smith, Proc. U. S. Nat. Mus., vol. viii, p. 174, 



1885; Ann. Kept. U. S. Comm. Fish and Fisheries for 1885, p. [81], 



* That species is not mentioned by Mr. Sharp as now in the collection 

 of the Philad. Acad. Sci. (See Bibliography below.) 



