Id AMPHIPODA NOKMAMA. 



The inferior anteiinie also show a distinction, in the last artioula- 

 tion of the peduncle not being longer than the preceding. 



There is another point which, from its anomalous character, must 

 not be overlooked, though, if we can bcUeve it possible that so great 

 and cautious an observer as M. Guerin-Mene^'ille could have been 

 mistaken, I should be inclined to think it to be a misconception. 

 M. Guerin has figured the mandible with a very minute append- 

 age. This is a feature that is absent not only from the genus, but 

 from the whole tribe of Saltatokia, — a circumstance that must either 

 remove T. plaUjcheles out of the family of Orchestidce, or induce an 

 entii-e revision of the tribe. Not having had the opportunity of 

 (hssectiug the animal myself, I prefer, after recording the circum- 

 stance, allowing it to remain in the genus to which the author 

 assigned it, rather than risk any alteration. 



Hah. Mediterranean; Genoa, and Corsican Sea (Guerin). Ed- 

 Avards records it from Greece and Italy. 



The specimen is preserved in the collection of M, Guerin-Meneville. 



Doubtful species. 



Talitrus Nicseensis. 



Talitru3 Nicseensis, Hisso, Faune de V Europe Meridionale*. 



Supposing this to be a Talitrus, there is nothing in Risso's descrip- 

 tion that is not consistent wdth its being the female of Locusta or of 

 platycheJes, or a variety of either. 



ffab. Neighboui'hood of Nice (Eisso). 



2. ORCHESTOIDEA. 



Orchestoidea, Nicolet in Ga?/^s Historia de Chile, iii. 



Spence Bate, Ann. Nat. Hist. 1858. 

 Megalorchestia, Brandt, Bulletin Physico-mathemat. de FAcad. de St. 

 Petersb. ix. 311. 



Stimpso)i, Journ. of Boston Soc. of Nat. Hist. vol. vi. 

 Talitromis, Dana, P-oc. Amer. Acad. Sci. Bost. ii. 202. 



This genus differs from Talitrus, as exhibited in T. Locusta, 

 in haAing the second pair of gnathopoda developed in the male 

 as large as in the male of the genus Orchestia, whereas the female 

 is a true Talitrus, and carries the second pau' of gnathopoda. in 

 an enfeebled condition, beneath the pereion. 



1. Orchestoidea? Novi Zealandiae. (Plate I. fig. 2.) 



Orchestia (Talitrus) Novi Zealandije, Dana, U.S. Explor. Exped. 

 pi. 56. f. 5. 



Femule. — Eyes round, small. Superior antennae reaching to the ex- 

 tremity of the penultimate articulation of the inferior antennae. 



^ T. corpore glaberrimo, hyalino. vitreo pcUucido ; oculis piu-pureo-nigris ; 

 antennis. pedibus tarsisque violascentibus. 



