CLASSinOATIOX Or THE MAIOID CEUSTACEA. 



64.9 



legs more or less dilated and compressed. Type Huenia ptvteus, 

 De Haan. 



SiMOCAECixus, Miers. Eostrum as in Huenia, but sliorter. 

 Pra?ocular spine wanting. Sexes dissimilar. Hands in adult 

 male turgid, not cristate above. Ambulatory legs not compressed. 

 Type Simocarcinus simplex (Dana). 



The type of this genus is the Huenia simplex of Dana; this 

 species and his H. hrevirostrafa are obviously male and female of 

 the same form. Specimens are in the British Museum of both 

 sexes. 



Ctcloxtx, Miers. Eostrum laminate, flattened, very broad, 

 and transversely oval in shape. Eyes situated in the narrow 

 angle between the base of the rostrum and front of the carapace, 

 the sides of which are produced into dilated wing-like expansions 

 as in Huenia. Type Cyclonyx frontalis (White). Only known 

 from a single female in bad condition. 



** JEyes onohile. Sexes similar. 



Men^thius, M.-Edio. Eostrum slender, acute. Praeocular 

 spine well developed. Carapace subtriangular. Anterior legs 

 with the palm slightly compressed, fingers arcuate. Ambulatory 

 legs not compressed. Type Mencetliiiis monoceros, Latr. 



§§§ Carapace usually more or less ohlony or orhiculate in outline. 

 Bostrum flattened, emarginate, hifid, or two-spined. Prceocular 

 usually luell developed. Myes molile. Basal antennal joint 

 dilated at base, narroivimj distally. Amlulatory legs of moderate 

 length. 



* Flagellim of anfennce concealed heneath tlie rostrum and not 

 visible from above. 



*LErcipPE, M.'Edioards. Eostrum laminate, divided by a nar- 

 row median fissure. Carapace subtriangular or subpentagonal. 

 Prjeocular spine wanting. Basal antennal joint not much en- 

 larged at the base. Type Leucippe pentagona, T^I.-Edwards. 



This genus marks the transition from the preceding section to 

 the present one. 



MiOTLUS, Stinipson. Eostrum laminate, bifid. Cara- 

 pace flattened, subpentagonal, with the lateral margins in both 

 sexes produced into bilobatc laminate expansions. Pra^ocular 



