REPORT ON THE AMPHIPODA. 311 



described, namely, Bathypureia pilosa, wliicli leaves its little labyrinthine tracks, and 

 sometimes short straight ones, in vast numbers over such stretches of sand as Mr. Hancock 

 describes. In regard to the species Sulcator arenarius and Kroijera arenaria, sec Notes 

 on Sp. Bate, 1851, 1857, and 1858. 



1858. Saussure, Henri F. de. 



Memoire sur divers crustaces nouveaux des Antilles et du Mexique. Mem. 

 de la Societe de Physique et d'Histoire naturelle de Geneve. Tom. XIV. P. 2. 

 Geneve 1858. pp. 417-496. Ordre des Amphipodes, pp. 474-475. Fig. 33. 



The new species described is called .4 Hi^/wfoe as<e««. " Halite ; Le Mexique; pris en abondance 

 dans une citerne de Vera Cruz." W. Faxon says, " After an examination of a large niimber 

 of Hyalella dentata und H. inerrnis from Utah, I am satisfied that they are but varieties of 

 one species. The form with dorsal teeth on the first and second abdominal segments is 

 very probably synonymous with Aryjhitoe aziecus Saussure and AUorchestes Knickerbocl-eri 

 Bate, as pointed out by Professor Smith himself." Hyalella azteca will therefore, in my 

 opinion, be the best name for Saussure's species. 



1859. Bate, C. Spence. 



On the fossd Crustacean found in the magnesian limestone of Durham, and on a 

 new species of Amphipod (1858). Quart. Journ. Geol. Soc, Vol. XV. 1859. 

 pp. 137-140, PI. VI. figs. 1-8. Nat. Hist. Review. VI. 1859 (Proc.)pp. 163-166. 



The fossU Crustacean is that supposed to be identical with the Trilobites problematicus of 



Schlotheim and by Schlauroth named Palxocraiigon prohlematlcus, which Kirkby changed 



into Prosoponiscus jn-oblematicus, thus far the only British fossil Amphipod. See Notes on 



H. Woodward, 1871 and 1877. 

 The new Amphipod is Phiedra antiqua, founded on a damaged specimen, which closely agreed 



with the fossil fragments. The new genus Phsulra is thus defined in the Brit. Sess. Crust., 



vol. i. p. 208 :— 

 PJixdra : — " Cephalon produced anteriorly. Segments of the pereion short, of the pleon long. 



Superior antennae shorter than the inferior, furnished with a secondary appendage. 



Posterior pair of pleopoda considerably elongated, biramous. Telson simple or notched." 



1859. Bate, C. Spence. 



On the genus Nvphargus, Schiodte. Dublin Univ. Zool. and Bot. Assoc. Proc. 

 I. 1859. pp. 237-240. Figs. 1-4. 



After a discussion of earlier notices of weU-shrimps, the new species Nipliargus fontanus and 

 Nipltargus kocltianus are figured and described, a new genus Crangvnyx is instituted, with 

 the species, Crangonyx subterraneus, to the description of which is appended the remark, 

 " it is not improbable that this may be the Ganimarus subterraneus of Leach ; but we have 

 no means of ascertaining." 



The name Crangonyx is derived from Kpayyuiv and vvi. 



The genus is thus defined : — " Like Gammarus, but not having fasciculi of spines upon the 



