198 Notes on North American Crustacea. 



fringed with long, parallel, incurving pairs. Ambulatory feet thread- 

 like, thin, and flexible ; the first pair more than three times as long as 

 the carapax, and with a very minute dactylus ; posterior pairs becoming 

 progressively shorter, with a compressed dactylus one-fourth the length 

 of the penult joint. Length of the carapax, 0.28; breadth, 0.2 ; distance 

 between tips of eyes, 0.18; length of first pair of ambulatory feet, 2 

 inches. 



It is very closely allied to P. riisei^ and is perhaps only a 

 variety, but the deflexed front and filiform feet seem to be 

 good distinctive characters. 



Ifletoporhaphis,* nov. gen. 



Carapax triangularis, superficie insequalis, ei Stenorhynchi similis. 

 Rostrum integrum, longum, exile. Antennae externaj longae, parte 

 mobili aperta. Antennulae ut in Leptopodia, basi non cochleariformes. 

 Maxillipedes externi eis Leptopodice fere similes. Pedum ambulatoriorum 

 dactyli fere recti, ciliati. 



The type of this genus is the Leptopodia calcarata of Say, 

 which we hare found upon examination to differ generically 

 from Leptopodia in its uneven or protuberant carapax, exposed 

 external antennae, etc. 



inetoporhaphis calcarata. 



Leptopodia calcarata Say, Jour. Acad. Nat. Sci. Philad. i. 455. 

 Gibbes, Proc. Am. Assoc. 1850, p. 169. 



We have dredged this species off the mouth of Beaufort 

 Harbor, N. C, in seven ftithoms, shelly bottom. 



£pialtus 8ulcirostris, nov. sp. 



Body and ambulatory feet smooth and naked. The carapax is widest 

 at the posterior of the two lateral teeth, which are rather acute at their 



* McrojTrot', frons ; pa<p\i^ acu£. 



