424 PROCEEDINGS OF THE ACADEMY OF [1879. 



reiopoda slender, long, equal ; dactyli of posterior pairs long, 

 slender, nearly straight. Type Anchistia gracilis Dana. 



B. Antennulae triflao-ellate. 



Genus EuRYHYNCHUsMiers. 1 " Rostrum triangular, broad at base, 

 acute, very short, barely reaching the extremity of the eyes ; 

 anterior margin of carapax with a small spine between the eyes 

 and the rostrum and another below the point of insertion of the 

 peduncle of the antennae; antennae with a small basal scale; an- 

 tennuhe triflagellate ; outer maxillipeds slender, second pair of 

 legs nearly as in Anchistia; tarsi of last three pairs of legs nearly 

 straight, acute." Type E. wrzesnowski Miers. 



I am uncertain as to the exact position of this genus, as the 

 author says nothing concerning the mandibles. There also exist 

 several discrepancies between the description and figures (Plate 

 lxvii. f. 2-2 a). The spine on the anterior margin being repre- 

 sented as external to the eyes, and the first pair of feet being the 

 larger, winch, if true, would remove it to the Alpheinse, from all 

 genera of which, however, it is separated bj r the triflagellate an- 

 tennuhe. Miers compares it with Anchistia and Harpilius, and 

 in that locality I allow it to remain. 



Genus Paljemonetes Heller. 2 Antennae, antennulae, and pere- 

 iopoda as in Palsemon ; carapax with antennal and branchioste- 

 gal spines, hepatic spine wanting ; rostrum long, lamellate. Type 

 Palsemonetes varians (Leach, sp.). 



Paleemonetes carolinus Stm. Specimens were collected by Prof. 

 Webster at Beaufort, N. C, and Marcou Pass, Fla. 



Palsemonetes vulgaris (Say, sp.), Stm. Beaufort, N. C., North- 

 ampton Co., Va., and Charlotte Harbor, Fla. 



o Genus Urocaris Stm. 3 Body slender, compressed; rostrum 

 cristate and toothed above, beneath straight, and edentulous; ocu- 

 lar peduncles long ; abdomen slender, elongate, the sixth segment 

 very much so. Type Urocaris longieaudata Stm. 



Urocaris longieaudata Stm. (1. c, p. 39.). As Stimpson's de- 

 scription is very short, and as this species has not been noticed by 

 subsequent writers, I append a short description, based upon speci- 



1 Proceedings of the Zoological Society of London, 1877, p. 662. 



2 Zeitschrift ftir Wissenschaftliche Zoologie, xix. p. 157. 



3 Proc. Acad. Nat. Sci. Philadelphia, 1860, p. 39. 



