564; Analytical Notices of Books. 



a new genus, Peronia, which occupies a place in the system near 

 Doris, to which it is connected by a new osculant genus, Onchi- 

 doris. The new species described is 



O. occidentale, dorso fusco atomis brunneis elevatis sparsis, ventre 

 pallido : lateribus livido-maculatis, brachiis apice divisis. 



This species is figured in the Transactions, and inhabits moist ele- 

 vated places in the island of St. Vincent, lying hid during the 

 day under stones, in a contracted form. Its eggs, about twenty 

 in number, oblong elliptical, yellowish, gelatinous, connected by 

 a filament and rolled together into a ball, are deposited in shady 

 places. In its very young state, the animal is pale, with the neck 

 and tail blackish. 



" An account of some rare West Indian Crustacea," by the 

 same authour, contains descriptions of several new species arranged 

 according to the system adopted by Dr. Leach in his excellent 

 works upon this subject, several of whose generic characters the 

 Rev. Lansdown Guilding has been enabled to correct and improve, 

 from the opportunities he possessed of procuring recent and per- 

 fect specimens. Thus to the generic character of Homola, Leach, 

 the following addition becomes necessary, " Antennm externa; 

 infra oculos insertas, longitudine corporis, filiformes, articulis 

 duobus basilaribus valde elongatis, primo crassiore, secundo apice 

 recurvo setigero." Of this genus, a new species, rather larger than 

 the H. spinifrons, is thus described 



H. spinipes. ? . H. rubescens, testa tota, femoribusque spinosis 

 hirsutis, pedibus anticis majoribus spinosissimis : digitis ni- 



gris. 



A new and common species of Macropodia, Leach, is also cha- 

 racterized 



M. occidentalis. M. olivaceatota hirsuta, antennis setigeris rostro 

 longioribus, collo tumido, unguibus interne spinosis. 



Of a new species of Leptopodia, L. ornata, the following cha- 

 racter is given : 

 L. ornata. L. rufescens, testa ulriuque lineis octo longitu- 



