Sotith African Crustacea. 37 



the first four peraeopods. the first and second maxillipeds having each 

 an epipod. With this branchial formula Alcock's account agrees, 

 except as to the species referred to his sub-genus Plastocrangon. It 

 may be noticed that in the original description of G. longirostris 

 (Smith), from a specimen 54 mm. long, the eyes, with a diameter about 

 one-fifth the length of the rostrum, were (in spirit) devoid of coloured 

 pigment, thus making an approach to Plastocrangon, but in larger 

 specimens subsequently described the eyes (in spirit) were dark 

 purplish brown, and nearly a third of the rostrum's length in diameter. 

 If the branchial formula which Bate has recorded should prove to be 

 correct for the species which he describes, or for any of them, it is 

 obvious that such species would form a division apart both from 

 Glyphocrangon and Plastocrangon. 



GLYPHOCBANGON SCULPTUS (Smith). 



1882. Bhachocaris scidpta, S. I. Smith, Bull. Mus. Comp. Zool. 



Harvard, vol. x., p. 49, pi. 5, fig. 3, pi. 6, figs. 3, Ba-d. 

 1884. Glyphocrangon scufytus, Smith, Eep. U.S. Fish. Comm. for 



1882, p. 365. 

 1886. Glyphocrangon sculptus, Smith, Eep. U.S. Fish. Comm. for 



1885, p. 655 (51), pi. 8, fig. 3, pi. 9, figs. 1, 2. 



The South African specimens which I assign to this species have 

 a character which, if not peculiar to it, is certainly uncommon. 

 The side-plate of the fifth pleon segment is distally tripartite, having 

 (as Smith notes) three acute points instead of the usual two. 



The rostrum is apically strongly upcurved, with a pair of teeth 

 in front of the eyes and another pair just behind them. The four 

 principal dorsal carinae of the carapace are formed by rows of 

 tooth-like tubercles. The large antero-lateral tooth is followed 

 by two teeth, successively much smaller, constituting a carina 

 which reaches the cervical sulcus ; the continuation of this carina 

 behind the sulcus is feebly undulating. The median carina of 

 the pleon is rather variable on the sixth segment, the proximal 

 division varying between two acute points and two that are more 

 or less blunt. 



The eyes in the preserved specimens are not dark purple but 

 deep orange. In the second antennae the small tooth of the scale 

 is about at the middle of the outer margin. There are nine stout 

 spines, besides some that are slighter, on the middle lobe of the 

 first maxilla. On the terminal joint of the second maxillipeds 

 there are six stout spines and a great many slender ones. 



