PO ek a URE Oe he ae He 
Botany and Bieaee 283 
for wherever the Hel ches, Nia and Tesekos ire affo 
favorable stations 
Cambridge, June 15,1 
7. Icones, Titoli oder Atlas der vergleichenden Gewebelehre ; 
zweite Abtheilu er feinere Bau der hihereren Thiere 
eft. Die iodaboien der Coelenteraten, mit x Tafeln und 13 Holz- 
schnitten; by A. Ké.uer. Leipzig, 1865.—This work is an elaborate 
essay upo n the microscopic structure of Polyps and Acalephs, but more 
especially, upon the hard parts of the Halcyonoid Polyps. It is well 
illustrated by numerous beautifully ape epee and cuts, ee the 
details of the pies = sections of the of Gorgoniz, 
culiar — and structure of the balbarools. — observed in ‘al Al- 
cyonaria; the inte pa of various Hydroids, ete. As ork illus- 
jendiag: the histology of these classes of an siinle it is eoaloable and far 
beyond any preceding work on the same subject. 
n pages 131 to 142 the author has given a Synopsis of the Classifi- 
cation of the Haleyonoid Polyps so far as known to him, and has intro- 
uced many new species and several new genera, with many important 
changes, based mainly upon the microscopic structure of the hard parts. 
us Primnoa is maintained with its original limits, he subdi- 
i is 
visions of D not being recognized 
restricted to — forms like fera — — os the grou 
having Jf. placomus Ebr. as its type, the new muricea . 
ietecke with ‘howe species. e new genus Biches alli 
have the precedence tw ies referred to (Z. flabellum and z. 
osa nov.) do not appear to be ientieal with either of those m 
tioned in this work. Th aura is restricted to forms like P. 
flexuosa Lamx., and for another group haying P. dichotoma as its type, 
the genus Pleaurella has been established, with six species. The limits 
of the genus Gorgonia have been enlarged by the reunion of Péerogorgia, 
Leptogorgia, Lophogorgia, Aiphigorgia, Rhipidogorgia,, easing ha 
and Haime. The genus Erythropodium is proposed for Xenia carybe- 
ete Du ~ et Mich., and this, with Sympodium, is placed in the family 
reariace 
The withioe is, however, ss at fault in uniting Gorgonia suberosa 
Ellis, Aleyonium m plecaureum Lamx., and A. asbestinum Pallas, into one 
ag (Br. suberosum Debsh for, as I have previously shown,” they rep- 
t three very distinct species and two genera. But Briarewm palma- 
pera Duch. et Mich. is probably identical with B. asbestinum. This i is 
ve roceedings Boston Soe. Nat. History, x, 22, and Proc, Essex Institute, iv, 187. 
* Bulletin of the Muse ok 68 Cong Doslogy, No. 3, p. 89, and Revision Polyps 
E. Coast U. U.S, p. 1 e 
