6 Annals of tlie. South African Museum. 



many points of difference from (Jr. dispersus. Thus he 

 describes the rostrum as long, with the four lateral teeth 

 as small and very slender, the gastric region of the carapace 

 carrying 2 little spines anteriorly, the chelipeds as rather 

 stout, hand with a thick palm, but very slender fingers, which 

 together are much narrower than the palm, sti'aight and not 

 toothed. 



In the specimens here referred to G. dispersus the rostrum 

 cannot properly be called long, and three of the lateral teeth 

 are not small nor always slender, the teeth behind the rostrum 

 on the gastric region are 6 in number. Within and slightly 

 below the antero-lateral tooth there is a small denticle, and 

 a row of denticles runs behind the antero-lateral to a pterygo- 

 stomian tooth ; a line of seven teeth runs down each side. 

 The first joint of the first antennae has three long apical 

 processes. The fingers of the chelipeds are together not 

 strikingly narrower than the palm, and they are not devoid 

 of teeth on their confronting margins, though the teeth are 

 inconspicuous except one near each curved apex. Perhaps the 

 most distinctive feature of this species is one to which Stimp- 

 son's account makes no allusion, namely, the four conspicuous 

 teeth on the oblique distal margin of the fourth joint in the 

 third maxillipeds. The difficulty of deciding anything as to 

 the independence of Stimpson's species is in large measure 

 due to the varying characters of G. dispersus. Thus Hender- 

 son states that " the first striated ridge on the gastric area, 

 situated at the base of the rostrum, bears from two to six 

 spinules, but in some cases they are obsolete." A. Milne- 

 Edwards and Bouvier have discussed the great differences in 

 size that occur between adult specimens. In our three South 

 African specimens, of graduated sizes, the medium one was 

 23 mm. long, of which the carapace accounted for 12*5 mm., 

 the rostral part of it being 4'5 mm., and the greatest breadth 

 8 mm. Only in the smallest of the three did the rostral 

 lateral teeth give the impression of slenderness. 



Locality. Great Fish Point Lighthouse, W. by N. 5 miles 

 (Cape Colony) ; depth 22 fathoms. A 919. 



GEN. MUNIDOPSIS, Whiteaves. 



1874. Munidopsis, Whiteaves, Amer. J. Sci., Ser. 3, vol. 7, p. 212. 

 1882. S. I. Smith, Bull. Mus. Comp. Zool., vol. 10, 



No. 1, p. 21. 



