406 PROCEEDINGS OF THE ACADEMY OF [1894. 



20. Caridina brevirostris Stimpson, 1860. 

 Stimpson, Proceed. Acad. Nat. Sei., Philadelphia, 1860, p. 29. 

 Geographical distribution: Loo-Choo (Stimpson). 



Doubtful Species. 11 



Caridina denticulata de Haan, Faun. Japon. Crust., Dec. 6, 1849, p. 186, pi. 45, 

 fig. 8. — Japan. 



Caridina leucosticta Stimpson, Proceed. Acad. Nat. Sei., Philadelphia, 1860, p. 

 28. — Japan, Simoda. 



Caridina serrata Stimpson, ibid., p. 29. — Hongkong. 



Caridina acuminata Stimpson, ibid., p. 29. — Bonin Isl. 



Caridina spathulirostris Eichters, Beitr. Meeresf. Maur. Seych., 1880, p. 163, pi. 

 17, fig. 28.— Mauritius. 



Caridina curvirostris Heller, 1862. 

 Heller, Verhandl. Zool. Bot. Gesellsch., Wien, 12, 1862, p. 525. 

 Heller, Crust. Novara, 1868, p. 105. 

 Miers, Catal. Crust. New Zealand, 1876, p. 78. 



Geographical distribution: Auckland (Heller). 



This species is provided with an supraorbital and an antennal 

 spine, the spine at the base of the antennulse is longer than the first 

 joint. 



It may belong to the genus Xiphocaris and may be identical with a 

 species of Xiphocaris from the River Avon, near Christ Church, pre- 

 sent in the Museum of Strassburg. Unfortunately I cannot give a 

 description of these specimens and a comparison with Heller's species. 



ATYOIDA Randall, 1839. 

 Randall, Journ. Acad. Nat. Sei., Philadelphia, VIII, 1839, p. 140. 

 This genus 12 has, up to the present time, been very doubtful. 

 Examining specimens of Atyoida bisulcata from Oahu, Sandwich, in 

 the Museum of the Academy of Natural Sciences of Philadelphia 

 (No. 162), I find that the hands of the two anterior pairs of legs 

 are wholly different from the typical Atya, in the same manner as 

 figured by F. Müller in Atyoida potimirim (1. c. , figs. 3 and 4). In 



11 The following three species described by Bate do not belong to Caridina; 

 but to the family HippolytidcB: — 



Caridina truncifrons Bate, Proceed. Zool. Soc. London, 1863, p. 499, pi. 40, 

 fig. 2, belonging to Latrentes. 



Caridina cincinnuli Bate, ibid.. p. 500, pi. 40, fig. 3, and Caridina temiiros- 

 tris Bate, ibid., p. 501, pi. 40, fig. 4, both belonging to Virbius. (All three from 

 Australia, St. Vincents Gulf. 



yi Atya serrata Bate, Challenger Macrur, 1888, p. 699, pi. 119, fig. 2, from 

 San Jago, Cape Verd Isl., and some other species described from the West Indies 

 (see below), may belong to this genus. In A. serrata the rostrum is shorter and 

 dentate below. 



