﻿98 Annals of the South African Museum. 



1901. AcanthcpJiyra ezimia, var. hrachytelsonis, Alcock, Catal 



Indian Deep-sea Macrura, p. 78, 

 (as A. hrachytelsonis) Illustr. In- 

 vestigator, Crust., pi. 3, fig. 2. 



1906. ,, ,, var. hracJujtelsonis, Kemp, Fisheries 



Ireland, 1905, pp. 21, 23. 



1914. „ ,, var. hrachytelsonis, Balss, Abhandl. 



K. Bayer Ak. Wiss., vol. 10, 

 Siippl. 2, p. 21 (distribution). 

 A South African specimen, with damaged antennae and the 

 body broken in two between the fourth and fifth segments of 

 the pleon, has the rostrum " armed on the upper surface near 

 the base with six small teeth, from which point it is smooth 

 to the apex, the lower margin has one tooth about one-third 

 its length from the apex, and two near together about one- 

 third from the base of the rostrum," in these respects exactly 

 corresponding wuth Bate's description and also with his illus- 

 tration, which differs very considerably fi'om that supplied for 

 A. eximius by the trustw^oi'thy pencil of Professor S. I. Smith 

 (Rep. Comm. Fish, for 1885, pi. 14, fig. 1, 1886). No doubt, 

 however, there are many connecting links between the two 

 forms. According to Bate his .4. angustus, which Kemp 

 identifies with A. eximius, has the pleon carinate from the 

 second to the sixth segment, and Alcock ascribes the same 

 character to A. eximius. In the form here considered the first 

 segment is also carinate. The various descriptions agree in 

 giving the length of the telson as less than that of the exopod 

 of the uropods, but it is not on that account especially short 

 as might be expected from the name hrachytelsonis. Its 

 narrow apex is armed with a central tooth fianked by a pair 

 of spines that are longer and stouter, with a slender pair 

 intervening from below; there are four dorso-lateral spines on 

 the right and three on the left of the distal half of the telson. 

 The scale of the second antennae, though narrowing from 

 the base, is not very narrow at the apex, which is just over- 

 topped by the marginal tooth. The mandibles have a broad 

 incisor process divided into 8 or 9 teeth of different sizes, the 

 most prominent one more or less central. This process is 

 attached to the molar, which in the left mandible, as seen 

 from the upper or inner surface, appears partially to fold over 

 it. The palp of the first maxillae has two small spines 

 projecting from the inner surface near the apex, and on the 



