'270 Analytical Notices of Books. 



culata Lam., and the A. cluvutu of Shaw ; and that the B. reni- 

 forniis MacL. is the A. globifera of Captain Sabine, and the A. 

 clavata of Otho Fabriciiis, and also, according to him, of Miiiler. 



The genus Cystim^ia is new. It agrees Avith Boltenia in the 

 body being affixed by a pedicle, which however is very short, and 

 in the tentacula of the branchial orifice being composite; but it 

 differs in the terminal position of the anal orifice, which is more- 

 over irregular instead of qnadrifid. It also differs in several 

 anatomical characters, particularly in tlie indistinctness and irre- 

 gularity of the reticulation of the branchial pouch. 



Dendrodoa is also new. It forms a subgenus of Ascidia, which 

 completes, with the four previously described by Savlgny, the cir- 

 cular series of that group. It indeed beautifully connects to- 

 gether the three aberrant subgenera of Ascidia^ one of which, 

 Styela, possesses at least one ovary on each side of the body ; an- 

 other, Pandocia^ a single ovary, which is seated on the right side ; 

 and the third, Dendrodoa^ having also a single ovary, which how- 

 ever is placed on the left. Dendrodoa also returns into one of the 

 normal subgenera, Cynthia, by the nature of its branchial reticu- 

 lation and of its digestive apparatus. 



It remains no.v to notice only one other paper, "• A Description 

 of such Genera and Species of Insects, alluded to ir the " Intro- 

 duction to Entomology" of Messrs. Kirby and Spence, as appear 

 not to have been before sufficiently noticed or described : by the 

 Rev. W. Kirby : Decade the first." In this, the able and veteran 

 author describes several new genera, the whole of which, with 

 one exception, are referable to the grand group of Scaradceus of 

 Linne. The exception is the genus Hexagc?iia, which is referred 

 by Mr. Kirby to the Lebiadce. It is founded on a species, //. ter- 

 minata, of which a description is given, and which is. probably 

 oriental. The genus appears to connect the LebiadcB with the 

 GalerUidce. The Dynastes of MacLeay is subdivided into genera, 

 for one of which that name has been retained, Scarab(sus Hercules 

 L. being taken as its type ; the other, Megasoma, having for its 

 type the Sc. Acfaum L. These arc readily distinguished from each 

 other by the external characters furnished by the horns of the 

 head and thorax, u.^ well as by the organs of manducation. A 



