igig.j S. Kemp : Notes on Crustacea Decapoda. 391 



M. crinitus, as Tesch has observed, is much more nearly related 

 to M. bosci than to M. pacificus, with which Miss Rathbun com- 

 pared it. I have examined a good series of M . bosci from the Red 

 vSea and find that the two species are to be distinguished by the 

 following characters : — 



Jlf. en nit us, Rathbun (fig. 7). 



Carapace widest behind tip of first 



a ntero- lateral tooth, less strongly 



areolated. 

 Orbital teeth not very sharp, their 



outer margins parallel. 

 Third tooth ' of antero-lateral border 



of carapace distinct. 

 Granulate crest on outer surface of 



palm of male conspicuous. 



M. bosci, Sav. & Aud. (fig. 6). 

 Carapace widest between tips of orbital 

 teeth, more strongly areolated. 



Orbital teeth very sharp, their outer 

 margins posteriorly convergent. 



Third tooth I of antero lateral border 

 of carapace practically invisible. 



Granulate crest on outer surface of 

 palm of male exceedingly faint. 



Tesch is mistaken in supposing that the species differ in the 

 form of the third maxillipeds. 



^4o^ Paway I., Mergui Archipelago. ' Investigator.' Three, 



-fo" Tanah Merah Besar, Singapore. N. Annandale. One. 



M. crinitus has been recorded only from Halmaheira (de Man) 

 and Amboina (Rathbun). M. bosci, though described from the 

 Red Sea and since reported from the E. coast of Africa, Malaysia 

 and Oceania, has not yet been discovered in Indian waters. 



Macrophthalmus pacificus, Dana. 



1915. AlacropJithalmiis pacificns, Tesch, Zoo/.. A/eded. AIus. Leiden, \, p. 190, 

 pi. viii, fig. 1 1. 



Thirteen specimens from Portuguese India belong to this 

 species; in the largest, which is a female, the carapace is I2"8 mm. 

 in length and i8'7 mm. in greatest breadth. I have compared 

 these individuals with a rather larger male from Australia, obtained 

 many 3^ears ago from the Queensland Museum, and am unable to 

 find any difference between them. 



Heller's M. bicarinatus irom the Nicobars is almost certainly 

 synonymous with this species. 



"fo^ Nova Goa, Portuguese India. S. Kemp. Four, 



^fo^ Rachol R., opposite Durbate, Por- 

 tuguese India ... ... S. Kemp. Nine. 



—■i-'^- Australia. Queensland Mus. One. 



The specimens from Portuguese India were found in brackish 

 water, under stones on the banks of the Mapusa and Rachol 

 Rivers. 



The species is known from the Nicobars (Heller), Penang and 

 Pontianak (de Man), the Loo Choo Is. (Stimpson), Upolu and 

 Samoa (Dana). 



1 Including'- the orbital tooth. 



