310 Analysed of Books. [Oct. 



Ci/ctnra tereSy 1. 16. Teeth small, uniform and pointed ; doi^al 

 ctefet wanting only over the sacrum ; scales of the sides, thighs 

 and legs ; bristled with minute spines ; tail cylindrical, tapering, 

 spiny rays, separated by twd roWs of depressed scales, without 

 spines above. Spines on the tings nearly equal, extending to the 

 end of the tail. 



The Lacerta acanthnta of ShaW is another species of this 

 genus, and called Cyclura Shawii, by Mr. Gray, The genus is 

 nearly allied to UromAfetrix of Merrem, 



Agamavultuosa, t. 19. Body grey; neck with a longitudinal 

 pleat ; tail round, long, scales rhomboidal, keeled, front of the 

 Dack and hind part of the head slightly crested. Length 10 

 inches. This species belongs to the sub-genus Calotis. 



Aguma corrwta, t. 20. Body depressed, ovate, rough, above 

 brown, variegated, beneath whitish ; head above quadrangular ; 

 tail half as long as the body. Arkansas. Length four inches. 

 This species is allied to Agami orbicularis, and belongs to the 

 sub-geniis Tapayia. 



Sept. setHiiedta, n. s, t. 18, f. 2. Body whitish. With three 

 dArk punctulated lirtes on each side, extending from the neck to 

 the middle of the tail ; head with 12 irregular unequal scales ; 

 toes two, unequal. Length four. inches. This species forms the 

 second species of the genus Bipes. 



JScincus bicolor, n. s, t. 18, f. 1. Above fuscous, beneath sil- 

 vfei*y white, with two longitudinal white lines on each side ; tail 

 round ; toes 5. Length 9\ inches. 



There is only one paper relative to Amphibia, consisting of a 

 Description of a New Species of Salamander. By W. W. 

 Wood, p. 306. 



Salamandra punctalissima, n. s. Greyish, entirely covered 

 with numerous black dots, extremities long and slender ; tail a 

 little longer than the body. Length 3i inches. 



This volume contains Two Papers on MoUusca, one a rety 

 interesting paper, on the Float of Jarthina, of which we will give 

 an extract among the Notices, and the other, a Description of a 

 New Species of Modiola. By Thomas Say, p. 368. 



Modiola opifexy n. t. 19, f. 2. Oval, reddish brown, anterior 

 hinge margin, flattened, cordate ; inside rather irridescent. 

 Minorca, breadth one a half, length one-fifth of an inch. This 

 species is allied to M. Discors by its shape. It hves in a cavity 

 formed of fine agglutinated sand attached to shells. 



In Radiata, Mr. Say has given an exceeding interesting 

 paper, on Two Genera and severd Species of Crioidea, p. 289, 

 in which he forms a New Family. 



N. G, Caryocrinites, Say. Column cylindrical, perforated 

 by a tubular alimentary canal, pelvis formed of four plates, 

 costals six, supporting the scapula, from which the arms pro- 

 ceed. This genus should be placed between th^ genera of 



