270 Analytical Notices of Books. 



culata Lam., and the A. cUiviUa of Shaw ; and that the B. rent- 

 forrnis IVIacL. is the A. globifera of Captain Sabine, and the A. 

 clavata of Otho Fabricips, and also, according to him, of Miiller. 



The genus Cystingia is new. It agrees with 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 quadrifid. It also differs in several 

 anatomical characters, particularly in the indistinctness and irre- 

 gularity of the reticulation of the branchial pouch. 



Dendrodoa is also new. It forms a subgenus of Jscidia^ which 

 completes, with the four previously described by Savigny, 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 now to notice only one other paper, " A Description 

 of such Genera and Species of Insects, alluded to in 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 ScarabcBus of 

 Linne. The exception is the genus Hexagonia, 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 Lebiadce with the 

 GaleritidcB. The Dynastes of MacLeay is subdivided into genera, 

 for one of which that name has been retained, Scarabceus Hercules 

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

 type the Sc. Actxeon L. These are readily distinguished from each 

 other by the external characters furnished by the horns of the 

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



