342 ME. J. E. HENDEBSON — A CONTEIBUTION 



Tuticorin, several specimens, overgrown with sponges and yoljzoa (Thttrston). Com- 

 mon on the reef at Rameswarani (J. B. H.). 



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



Genus Simocarcinus, Miers. 



5. Simocarcinus simplex (Dana). 



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

 H. brevirostrata, 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 

 heen hroken off, and, as noted hy Miers, the anterior pair of lateral lohes 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^ethitjs, Milne-Edwards. 



6. Men^thius monoceros (Latreille). 



M. monoceros (Latr.), A. Milne-Edwards, Nouv. Arch. Mus. Hist. Nat. t. viii. p. 252 (1872), ubi 

 synon. 



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

 tahan (Oates). Very common on the reef at Rameswaram, and usually overgrown with 

 sponges and hydroids (J. B. S.). 



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

 very variable and widely distributed form. 



Distribution. From the Fed Sea and East Coast of Africa to Japan, New Caledonia, 

 and the Fiji Is. 



Genus Doceea, Leach. 



7. Doclea uybrida (Fabr.). 



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



( = ? D. hybridoida, Bleeker). 



Ceylon (Ilahj). Very common at Madras, and elsewhere on the Coromandel coast 

 (J. B. H.). 



Distribution. Malay Archipelago, Mergui. 



8. Doclea muricata (Fabr.). 



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



Gulf of Martaban (Oates). Madras, not uncommon (J. B. DZ.). 



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



