644 MR. E. J. MIEES ON THE 



form ridges defining the afferent branchial channels. Type Po- 

 chnema Biisci, Stimpson. 



Subfamily 2. Inachin^. (See Plate XII. figs. 3, 4.) {Macropodiens, 

 M.-Edwai'ds, part. ; Eurypodiida, Stimpson.) 



Eyes slender and retractile. Prajocular spine usually wanting, post- 

 ocular usually distinct. Basal antenual joint usually very slender through- 

 out its length, not narrowing distally. 



The carapace is subtriangular or subpyriform ; its margin is often slightly 

 produced over the base of the eye-peduncles. Rostrum simple, bifid, or 

 two-spined. The merus joint of the outer maxillipedes is either truncated 

 and articulated with the next joint at its antero-internal angle, or elongated 

 and rounded at its distal end. The anterior legs in the male are small, or 

 have the palm inflated and the fingers acute. The ambulatory legs are 

 usually slender, and often very long. Postabdomen 5- to 7-jointed. 



In this subfamily are included what may be considered the 

 typical Inachidse. The form of the merus joint of the outer max- 

 illipedes would probably afford excellent sectional characters ; but 

 as many of the genera are unknown to me, I prefer to group 

 them according to the form of the rostrum. 



§ Hostriivi very short, emarginate. 

 * Basal mitennal joint reaching to front. 

 EuciNETOPS, Stimpson. Carapace suboblong. Eostrum short, 

 bifid, slightly deflexed. Eyes extremely long and mobile. Outer 

 maxillipedes with the merus joint short, truncated at distal end. 

 Ambulatory legs of moderate length. Type JEucinetops Lucasii, 

 Stimpson. 



Camposcia, Latreille. Carapace elongated, subpyriform. Eos- 

 trum very short, emarginate. Eyes long and slender. Outer 

 maxillipedes with the merus joint elongated, obovate, and rounded 

 at its distal end. Ambulatory legs very long. Type Camposcia 

 retusa, Latreille. 



The genus JEucinetops in the form of the carapace, eyes, and 

 maxillipedes has some affinity with Micippa and its allies ; Cam- 

 poscia, in the form of the merus joint of the outer maxillijDedes, 

 approaches Inachiis. 



The four following genera (of none of which I have seen spe- 

 cimens) are constituted a distinct subfamily (CoUodinse) by Stimp- 

 son, on account of the shortness of the rostrum. This character 

 is of scarcely sufficient importance for such a purpose; and it 



