TO INDIAN CARCINOLOGl'. Ml 



Order DECx\PODA. 

 Suborder B K ACIIYURA. 



Group O X Y 11 H Y N C H A. 



Genus Ach^eus, Loaeli. 



1. AcH^rs LACERTosus, Stimpsoii. 



A. lacertosus, Stimpson, Pi'oc. Acad. Nat. Sei. Pliilad. p. 218 (1857); Miers, 'Alert' Crust, p. 188 

 (1884). 



(= A. //refirt'/is, Haswcll). 



Gulf of Martaban, two females with ova, and a mal(> [Oates). 



These specimens are not in a very good state of preservation, but there can be little 

 doubt that they belong to this species. 

 Distribution. E. & N. Australia. 



2. AcH^us AFFixis, Miers. 



A. affinis, Miers, ' Alert' Crust, p. 188 (1881); Dc Man, Brock's Crust. ]). 218 (18S8). 



Gulf of Martaban, a female (Oates). 



This species is distinguished from the last chiefly by the presence of a prominent 

 bilobed tubercle on the cardiac area, and by its tuberculated ocular peduncles. 

 Distribution. E., N.,andW. Australia, Malay Archipelago. 



Genus Oncinopus, De Haan. 



3. Oncinopus akanea, De Haan. 



O. aranea, De Haan, ('rust. Japou. p. 100, pi. .\xix. fig. 2 (1850). 



(= O. Nejjtuiius, Adams & "White, (>. subpe/htcidu.i, Stm., 0. nm/H/aii/.s, Hasw.). 



Muttuwartu Par, a female with ova, and a male carrying a Scuctilina [Thurston). 

 Gulf of Martaban, several specimens [Oates). 



All the described species of this genus are referred by Miers to O. aranea, and he has 

 shown that there is considerable variation in the length and roluistness of the legs, 

 characters on which the so-called species had lieen founded. Tlie carapace and legs arc 

 much more attenuated in the male than in the female. 



Distribution. Japan, Mindoro Sea, Singapore, N. & N.E. Australia, New Hebrides. 



Genus Huenia, De Haan- 



4. Htjenia Proteus, De Haan. 



H. Proteun, De Haan, Crust. Japon. p. 95, pi. xxiii. figs. 4, 5 J , tig. 6 ? (1850). 



(= H. De/iaani, White; //. Proteus, vars. temiipes, elomjuta, and heruldica, Adams & AVhite). 

 SECOND SERIES. — ZOOLOGY, VOL. V. 50 



