414 Analj/tical Notices of Bodks, 



three rows of depressed scales." Inhabits Turk's Island. Total 

 length two feet four inches ; length of the tail, one foot three 

 inches. 2. C. teres, " Teeth small, uniform and pointed; 

 dorsal crest wanting only over the sacrum ; scales on the sides, 

 thighs, and legs, bristled over with minute spines; tail cylin- 

 drical, tapering gradually towards the point; spiny rings en- 

 circling the tail, separated by two rows of depressed scales with- 

 out spines above; spines on the rings nearly equal, extending to 

 the end of the tail." From Tampico. Total length one foot 

 eight inches and a half; length of the tail eleven inches. 



In Ichthyology there occur two articles ; one being a '^ De- 

 scription of a new species of Fish of the Linnean genus Perca^ by 

 J. Gilliams," which he refers to the gefius Scolopsis of Cuvier, and 

 describes by the trivial name of Sayanus ; and the other being 

 *^ Descriptions of several species of the Linnean genus Rata, of 

 North America, by Mr. C. A. Lesueur." In this latter are de- 

 scribed three species of Raia^ Cuv. the R, Desmarestia, R* eglan- 

 tiera^ and JR. Chantenay : one of Trygon, Adans., the T, sabina; 

 one of Myliobaiis, Dum. the M. Freminvillii ; and one of 

 Cephalopiera, the C. giorna. 



In recent Conchology there is only an incidental notice con- 

 tained in the " Account of some of the Fossil Shells of Maryland, 

 by T. Say." In this the industrious author points out the neces- 

 sity for establishing a new genus under the name of Dispotoea, 

 which is thus characterized : " Shell univalve, conoidal, patelli- 

 form, with an internal entire cup-shaped appendage, adhering by 

 its side and apex to the side of the shell." Its type is a recent 

 species from South America, described by Mr. Say as D. tubifera^ 

 but which appears to be identical with the cup-and-saucer limpet, 

 as it is termed by the dealers, the Calyptrcea auriculata^ Chemn. 

 and C. extinctorium ? of Sowerby's Genera, a shell which Mr. Say 

 does not seem to have been previously acquainted with. The 

 other species which he refers to it are, D, grandis^ fossil, ovate, 

 concentrically wrinkled, and destitute of spines or processes; and 

 D. costata, previously described by him as a Calyptrcea, 



The continuation by the same gentleman of his " Descriptions 

 of Coleopterous Insects collected in the late expedition to the 



