Zoology. 295 
naked character of the tentacles and their number, siz, being widely 
different from the same in the Gorgonie and other Alcyonaria, in 
which the tentacles are fringed with papilla, and the number is eight. 
The Actinie usually separated widely from coral zoophytes, have re- 
ceived their true place, in close affiliation with the Astreide. 
2. A new genus of Orchestide ; by J. D. Dana.—In a synopsis of the 
genera of Gammaracea, in this Journal, volume viii, p. 185, three 
era of Orchestide are mentioned, Talitrus, Orchestia and Allorchestes. 
We here add a fourth; and for the purpose of giving a fuller compar- 
ative view of the four, and correcting a misprinted word, we insert 
the generic characters for the group. 
1. Pedes primi non cheliformes nec subcheliformes, 
articulo styliformi confecti; secundi sepe subcheli- 
formes, manu sive parvula et debili sive nulla, - 
tenn superiores basi inferio reviores. 
2. Talitro pedes primos antennasque similis, Pedes 
maris pt valde subcheliformes, manu grandi, Talitronus (Dana). 
3 
Talitrus (Latreille). 
F S 
formes. Antennz superiores basi inferiorum brevi- 
ores. Maxilli i i 
des apicem obtusi. ‘ Orchestia (Leach). 
4. Pedes primi secundique plus minusve subcheli- 
formes. Ant peri brevi , basi inferiorum 
longiores. Maxillipedes apicem unguiculati. Allorchestes (Dana). 
mipore is essentially different from thut of the Astreoid species 
alluded to—in the former, the buds being Jateral from towards the base 
of the polyps, while in the latter (as in Astreas) the summit of the 
polyps gradually widens or extends and produces buds. The corals of 
is differ 
‘tained the Astreoid species in the genus Astrea a 
subdivisions, corresponding, of Orbicellat and Fissicella, the latter in- 
cluding the species which increase by a subdivision or fission of disks, 
and the former those whose buds were marginal or interstitial. 
* See this Journal [2], iii, 16, 18. le ait 
t Corresponds to oil's subdivision Tubastreea, a name of hybrid origin, 
