Zoological Society. 207 



very strong transverse ridge. Outer jaw-feet with the third joint 

 on the outside straight, not dilated. Fore-legs small; hind-legs 

 very long; tarsus not particularly dilated, somewhat elongated, 

 fringed with hairs, as is the preceding joint. 



This genus, which is shortly characterized above, belongs to the 

 family Grapsida, being nearly allied to Trichopus, De Haan, which is 

 synonymous with Varuna, M. Edwards. 



Utica gracilipes, White, 1. c. p. 43. 



Front wide, fore-edge very straight ; behind it, and extending to 

 the middle of the carapace, there is a considerable, wide, somewhat 

 three-sided elevation, separated from the transverse ridge by a deep 

 lunated depression, from the ends of which a slight impressed line 

 proceeds to the side of the ridge where it deepens ; legs very slender 

 and fringed with hair. 



This species is a native of the Philippine Islands, from which it 

 was first brought by Mr. Cuming. He found it in a freshwater 

 rivulet among the mountains of the island of Negros. Mr. Adams 

 found it also in the island of Mindanao, and from his journal has 

 given me the following description, taken from the crustacean when 

 alive : — 



" Carapace dark liver-colour ; legs reddish brown ; under surface 

 dark brown, on the legs with a lighter tinge ; abdomen also of a 

 lighter colour, with a yellowish line down the middle. °. . Frequents 

 the deep, still, muddy freshwater rivers of the island of Mindanao, 

 hiding under weeds and rotten wood. When caught this singular 

 crustacean feigns death, contracting its limbs and rendering them 

 rigid, as if it were in a catalepsy." 



5. Descriptions of several New Species of Spondylus. By 

 g. b. sowerby, jun. 



Spondylus unicolor. Spond. testd solidd, oblique ovali, rubro- 



violascente ; costis 6 principalibus, squamis crassis, arcuatis ; 



subtus concavis, paululum palmatis, prope marginem numerosis ; 



costis interstitialibus spinis crassis, brevibus, arcuatis ornatis ; 



inter costas sulcis nonnullis. 

 Hab. ? Mus. M. Griiner; G. B. Sowerby. 



Spondylus Cumingii. Spond. testd liberd, regulari, subrotundatd, 



subdepressd ; ared cardinali parvd ; costis principalibus 6 elevatis, 



lavibus, squamis subelongatis, lavibus, arcuatis, palmatis, ad 



latera palmarum undulatim fimbriatis ; interstitiis imbricatim stri- 



atis ; colore fusco rubescente. 



A free-growing species, with short cardinal area, in some degree 



resembling S. regius and S. imperialis, but most remarkable for the 



beautiful manner in which the arched palmated scales are frilled and 



fluted at the sides. 



Hab. ? Mus. H. Cuming. 



Spondylus limbatus. Spond, testd ovali, crassd, vix costatd, 

 squamis depressis, Icevibus, palmatis, brevibus, irregularibus, ince- 



