124 Notes on North Atnerican Crustacea, 



and at about the anterior third of the length of the carapax ; below, 

 the rostrum is armed with three minute teeth. On the anterior mar- 

 gin of the carapax there is a strong spine above the base of the antennae, 

 and a minute one below it. Flagella of the antennulje equal, and 

 very long, one and a half times as long as the body. Acicles or ap- 

 pendages to the antenna? broad even to their tips, and much longer 

 than the peduncles of the antennulse. External maxillipeds thickly 

 setose, and reaching the extremity of the acicles. Terminal segment 

 of the abdomen with two pairs of aculei above. 

 Length, 1.25 inches. 



Found at San Diego, Cal., by Mr. Cassidy. 



This is the analogue of the Florida species, TI. Wttrdemanni 

 {Hippolyte Wttrdemanni Gibbes), from which it differs in its 

 hjnger antennulse, smaller eyes, etc. 



RliyiichocylH§ parvnlas, nov. sp. 



Dorsum of the carapax elevated, and protuberant at the middle of 

 its length, its anterior half having a considerable slope forward, and 

 being obtusely carinated and armed with five small, spiniform teeth ; 

 — the posterior two teeth being somewhat remote from the anterior 

 three, which are approximated. Rostrum one-third as long as the 

 carapax, rounded-ovate, reaching beyond the tips of the peduncles of 

 antennulfe and the antennal scales, and serrated with six teeth above 

 and three below near the extremity. Antennulse longer than the 

 rostrum ; antennae as long as the body. The external maxillipeds 

 reach the extremity of the peduncle of the antennae. Feet of the 

 first pair very short ; carpus half as long as the meros, and excavated 

 in front for the reception of the hand. Feet of the second pair with 

 a triarticulate carpus. Abdomen -smooth above; caudal segment with 

 two pairs of aculei on the dorsum. 



The color in life is unknown to me. Alcoholic specimens are plen- 

 tifully spotted and blotched with whitish pigment. 



Length, half an inch. 



Found at St. Joseph's I., Texas, by Gustavus Wurdemann, 

 Esq. 



