390 . jS. I. Smith on the Crustacea of Brazil 



the female, the dactylus is short and armed on the posterior 

 side of the base, with a stout process which closes against a 

 similar process from the extremity of the propodus, both pro- 

 cesses being hairy on the outside, and having horny spoon- 

 shaped tips. — Pernambuco. 



Alpheus lieterochelis Say. — Eeefs of the Abrolhos. 



Palcemon Jamaicensis Olivier. — Penedo, Rio Sao Francisco. 



Palcemon forceps Edw. — Mouth of the Para. 



Palcemon ensiculus Smith (Trans. Conn. Acad., vol. ii, p. 26, 

 plate i, fig. 2. — Para.) 



Rostrum very long, strongly curved downward for the basal 

 half of its length, the terminal half very slender, nearly straight, 

 but strongly inclined upward, armed above with nine to twelve 

 short teeth of which seven or eight are on the basal portion, 

 and the others near the tip, and below with eight to twelve teeth. 

 Second pair of thoracic legs in the male very long and quite 

 slender, in full grown specimens, the merus reaching beyond 

 the tip of the antennal scale, and all the segments to the base 

 of the fingers closely beset with short spinules ; hands cylind- 

 rical, not swollen, the fingers slender and sparsely clothed with 

 short, downy pubescence ; in the females and young the second 

 pair of legs smaller and much less spinulose. Penultimate 

 segment of the abdomen long and narrow, the length above 

 being twice as great as the breadth ; terminal segment narrow 

 and tapering regularly to a very slender and acute point. 

 Length, 65 to 100 mm . 



Peneus Brasiliensis Latr. — Bahia. 



Xiphopeneus Smith, gen. nov., (Trans. Conn. Acad., vol. ii, 

 p. 27). 



Carapax much as in Peneus, but the rostrum very long and 

 slender, and the gastro-hepatic sulcus scarcely perceptible, while 

 the cervical and branchio-cardiac sulci are distinct. Lamelli- 

 form appendages on the inside of the peduncle of the antennulse 

 very small, not expanded over the eye as in Peneus ; anten- 

 nulary fiagella very long and slender, the upper ones much 

 stouter and longer than the lower. Antennas, maxillipeds and 

 the three anterior pairs of thoracic legs nearly as in Peneus. 

 Fourth and fifth pairs of legs very long, the terminal segments 

 very slender and flagelliform. 



Xiphopeneus Harttii Smith (Trans. Conn. Acad. , vol. ii, p. 28, 

 plate i, fig. 1.) — Caravellas, Province of Bahia. 



Rostrum as long as, or considerably longer than the carapax, 

 wholly unarmed below, but the basal portion with a thin 

 carina above, which extends back upon the carapax and is 

 armed with six sharp teeth, the terminal portion is sub- 

 cylindrical, unarmed, and tapers to a very slender point far in 

 front of the antennal scales. Upper fiagellum of antennula 



