E sen 
T WEN VVCEKR 
"n 
A new genus of Orchestide ; by J. D. Dax4.—In a synopsis of the 
genera of Gammaracea, in this Journal, volume viii, p. 135, three gen- 
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 sspe subcheli- 
formes, manu sive parvulà et debili sive nullà. An- 
tennz superiores basi inferiorum breviores. Talitrus (Latreille). 
2. Tulitro pedes primos antennasque similis. Pedes 
maris secundi valde subcheliformes, manu grandi. Talitronus (Dana). 
3. Pedes primi seeundique plus minusve subcheli- 
formes. Antenne superiores basi inferiorum brevi- 
ores. Maxillipedes apicem obtusi. Orchestia (Leach). 
4. Pedes primi secundique plus minusve subcheli- : 
formes. Antennz superiores breviores, basi inferiorum | 
longiores. Maxillipedes apicem unguiculati. Allorchestes (Dana). 
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