342 ME. J. K. HENDERSON— A CONTKIBUTION 



Tuticorin, several specimens, overgrown with sponges and polyzoa{ T/mrstow). Com- 

 mon on the reef at Rameswaram [J. B. M.). 



Distribution. Japan, China, Malay Archipelago, N. & N.E. Australia. 



Genus Simocakcinus, Miers. 



6. SiMOCARCiNus SIMPLEX (Dana). 



Huenia simplex, Dana, Crust. U.S. Explor. Exped. vol. i. p. 133, pi. vi. fig. .3, ^ (1852). 

 H. brevirosfrata, Dana, 1. c. p. 134-, pi. vi. fig. 4, ? (1852). 



Tuticorin, a male and a female {Thurston). 



The male is of small size and has the rostrum much more elongated than is represented 

 in Dana's figure, with the apex somewhat trigonal. In the female the rostrum has 

 been broken off, and, as noted by Miers, the anterior pair of lateral lobes on the carapace 

 are larger than figured by Dana, and their apices are subtruncated. In this species, as in 

 the last, there is great sexual dimorphism. 



Distribution. Sandwich Is. {Dana, Miers). 



Genus Men^thius, Milne-Edwards. 



6. Men^thius monoceros (Latreille). 



M. monoceros (Latr.), A. Milne-Edwards, Nouv. Arch. Mus. Hist. Nat. t. viii. p. 352 (1872), ubi 

 synon. 



Rameswaram, Tuticorin, Muttuwartu Par, Silavaturai Par {Thurston) ; Gulf of Mar- 

 taban {Oates). Very common on the reef at Rameswaram, and usually overgrown with 

 .sponges and liydroids {J. R. II.). 



No less than eleven so-called species have been referred by A. Milne- Edwards to this 

 very variable and widely distributed form. 



DistribufloH. From the Red Sea and East Coast of Africa to Japan, New Caledonia, 

 and the Fiji Is. 



Genus Doclea, Leach. 



7. DocLEA HYBRiDA (Eabr.). 



D. hybrida (Fabr.), De Man, Mcrgui Crust, p. 9 (1887). 



( = ? D. hybridoida, Bleeker). 



Ceylon {Ilaljj). Very common at Madras, and elsewhere on the Coromandcl coast 

 {J. B. K.). 



Distrihiition. Malay Archipelago, Mergui. 



8. DocLEA MURICATA (Eabr.). 



D. muricata (Fabr.), Milne-Edwards, Hist. Nat. Crust, t. i. p. 295 (1834). 



Gulf of Martaban (Oates). Madras, not uncommon {J. R. 11.). 



The spines on the carapace; of this species are strongly developed, more especially in 



