10 Mr. E. J. Miers on new or little-known 



Paramithrax {Paramithrax) halimoides, sp. n. 



Carapace elongated, and scarcely narrowing anteriorly, with 

 five long spines in a longitudinal median series, of which two 

 are on the gastric, one on the cardiac, and one on the in- 

 testinal region, and one on the posterior margin directed back- 

 ward ; also one on each branchial region. The spines of the 

 rostrum are long, acute, and slightly divergent. The prse- 

 ocular spine is prominent and acute, the postocular large and 

 lamellate, and it is followed by a smaller prominence on the 

 hepatic region. Basal antennal joint rather narrow, with two 

 spines, of which one at the antero-external angle is prominent 

 and directed outward. Merus joint of the outer maxillipedes 

 with a notch for the insertion of the following joint at its 

 antero-internal angle ; exognath narrow. Anterior legs (in 

 the male) small and slender ; arm with a slight dentated crest 

 on its under surface, wrist carinated above, palm compressed, 

 and fingers straight and acute. Ambulatory legs slender, 

 with a prominent spine at the distal end of the merus joints. 

 Postabdominal segments (in the male) distinct, slightly tuber- 

 culated in the middle line. Length of carapace to base of 

 rostrum about § inch. 



Hab. Eastern seas {H.M.8. l Samarang '). 



This species is mentioned but not described, under the name 

 of Chorinus halimoides, by White, in the { List of Crustacea in 

 the British Museum,' p. 123 (1847) ; and De Haan's Halimus 

 incisus is referred to doubtfully as synonymous with it ; but 

 it has nothing to do with that species, which belongs to the 

 genus Pugettia, and has recently been received by the British 

 Museum from the Japanese seas. It is not referred to in the 

 { Zoology of the Voyage of the Samarang.' It is distin- 

 guished from Paramithrax aculeatus {Chorinus acideatus, 

 M.-Edw.), and Paramithrax longispinus (De Haan), and 

 P. acanthonotus and P. verrucosipes , Ad. & White, all of 

 which have been referred to Chorinus } by the number and 

 disposition of the spines of the carapace. I believe it to be 

 necessary to restrict the genus Chorinus to the single species 

 comprehended in Milne-Edwards's first section of the genus, 

 the West-Indian C. heros (Herbst). 



Acanthophrys paucisjrina, sp. n. 



Carapace subpyriform and spinose above ; there are two 

 or three small spinules in a longitudinal median series on the 

 gastric region, another on the cardiac region, followed by a 

 prominent spine, and a tubercle on the intestinal region ; there 



