CIASSIFICATION OF THE MAIOID CRUSTACEA. G47 



joint more or less flattened, and dilated toward its distal end. 

 Type Halimiis aurifns, Latreille. 

 This genus establishes a transition to the Maiida?. 



Amathia, Carapace subtriangular, spinose. No spines 



above the eye. Anterior legs of moderate size. Ambulatory 

 legs slender aud cylindrical, penultimate joint not dilated. Type 

 Amatliia Hissoana, Eoux. 



Chobinl^s, ZeacJi. Carapace elongated, convex, without lateral 

 marginal spines. A prominent pra)ocular spine. Eyes very small. 

 3Ierus joint of the outer maxillij^edes not auriculated. Anterior 

 legs in the male greatly elongated. Ambulatory legs of the first 

 pair much elongated, of the last three pairs short. Type Chorimis 

 Iter OS (Herbst). 



Maceocheiea, De Haan. Carapace triangular. Prgeocular 

 spine small. Basal antenna! joint very small, not reaching the 

 front. Merus joint of the outer maxillipedes elongated, and 

 rounded at its distal end (as in Camposcia and Inaclius). Legs 

 very long. Type Macroclicira K'dmpferi, De Haan. 



2. Third joint of the outer maxilli2Jedes notched at its distal end. 



Eeichoplattjs, a. M.-Edivards. Carapace subtriangular. 

 liostrum bifid, its spines divergent. Basal joint of antenna) rather 

 robust. Anterior legs in male loug and slender. Ambulatory 

 legs with the penultimate joint dilated and square-truncated as 

 in Aconthonyx. Type JErichoflatus Suttoni, A. M.-Edwards. 



This genus establishes the transition from the present subfamily 

 to tlic iVcanthonychina?. The single species was contemporaneously 

 described by me as Ilalimiis Hectori, from an imperfect specimen. 



Subfamily 3. Acanthonychin^. (See Plate XII. figs. 5, 6.) {Maiens 

 phanerophthalmes, M.-Edw., part. ; Acanthonychidce, Stimpson.) 



Eyes small and immobile or partially retractile, and concealed beneath 

 the prominent pra^ocular spine. Basal antennal joint usually enlarged at 

 base and narrowing distally. Postocular spine small or absent. 



The carapace is usually more or less oblong and flattened, more rarely 

 elongated and subcylindrical or subtriangular. Rostrum simple or bifid. 

 The merus joint of the outer maxillipedes is truncated at its distal end, and 

 articulated with the next joint at its antero-internal angle. The anterior 

 legs in the male usually have the palm compressed. The ambulatory legs 

 are of moderate length. Postabdomcn 4- to 7-jointed, 



