BRACHYURA. 377 



supra-ocular eave is hardly so much produced ; (2) the two gastric spines are not so 

 long ; (3) the intestinal tubercle is but slightly represented. The present examples 

 belong to the comobrinus variety. 



Halimus convexus (MIERS), var. hendersoni, nov. 



Localities : Coral reefs, Gulf ofrManaar, two specimens (ovigerous ? and young c?) ; 

 west of Cheval Paar, two specimens (young c? ) ; Cheval Paar, three specimens 

 (young ?). 



Description: C.I. of the ovigerous female = 10 '50. 



They differ from MIERS' form (' "Alert" Expedition/ p. 196 and figure) in having (1) 

 an epibranchial tubercle on either side ; (2) the carapace regions less strongly 

 demarkated and less convex ; (3) the rostral spines less divergent, straighter and 

 shorter. 



Remarks. The specimens agree with the two dried ovigerous females from Penang 

 in the British Museum, with which HENDERSON (p. 344) describes his Martaban 

 example as almost identical. There is thus a group with a fairly wide distribution 

 which differs from MIERS' form in certain definite respects : I call it var. hendersoni. 



This variety bears a suspiciously close resemblance to descriptions and figures of 

 Halimus sub-inermis (ZEHNTNER) ('Revue Suisse de Zool.,' ii., p. 136, pi. vii., 

 figs. 2, 2c&), and to Halimus espinosus, BORRADAILE (p. 688, pi. xlvii., fig. 4). I have 

 not seen specimens of either of these species. The main difference from Halimus 

 espinosus seems to be the form of the rostral spines. I should be inclined to merge 

 both in Halimus convexus (MiERs). 



Halimus brocki (DE MAN), 1887 (' Arch. f. Naturges.,' liii., p. 22). 



Locality : Off Mutwal Island, one specimen. 



Description: A male, perhaps adult. C.l. (measured anteriorly to the angle 

 between the rostral spines) = 9 '50 ; rostral spine 1. -7- C.I. = I'O. 



The rostral spines diverge less in their distal than in their proximal portions. 



Halimus agassizi, RATHBUN, 1902 ' Bull. Mus. Comp. Zool.' xxxix., p. 133, fig. 6. 



Localities : Pearl banks, Gulf of Manaar, one specimen (a) ; off Mutwal Island, one 

 specimen (b) ; pearl banks, off Manaar, one specimen (c). 



Description : (a) ovig. ? . (b) ovig. ? . (c) ad. ? . 



C.I 8-50 6-00 6-50 



R.1.-J-C.1 0-58 0'54 



In specimen (a) there are a few inconspicuous hooked hairs, in no way hiding from 

 view the tuberculation of the carapace, which I find to agree with Miss RATHBUN'S 

 description of the male. The walking legs have a smooth appearance. In specimens 

 (b) and (c) hooked hairs are numerous, obscuring the tuberculation of the carapace 

 and giving the legs a roughened appearance. 



As a point of distribution I may note that I found a specimen of this species (an 



3 c 



