﻿22 



Annals of the South African Miiscum. 



small smooth interval near the apex in the second maxillae, to make 

 up for which there is a closely packed group of spines on the surface 

 close to the apex. The second and third maxillipeds agree with all 

 the five pairs of peraeopods in having each a minute exopod, the 

 smallness being in striking contrast with the great length of the 

 endopod in the third maxillipeds and most of the following 

 appendages. 



For the three chelate pairs of limbs the relations of length between 

 the several joints may be sufficiently estimated by help of the illus- 

 trations, as they do not appear to show anything exceptional. It 

 may, however, be noticed that in each pair the teeth of the opposing 

 margins are not continued even half-way along the fingers from 

 their blunt apices. A transparent membrane shielding these mar- 

 ginal teeth is perhaps usual in this family. 



The total length of the specimen dissected was 87 mm., the 

 carapace with rostrum being 31 mm. long, the sixth pleon segment 

 11 mm., and the telson 125 mm. 



Locality. East London NW. ^ N. 18 miles (Cape Colony) ; depth 

 250-300 fathoms. Obtained by Dr. Gilchrist. No. 208. The 

 specific name alludes to the distinctly three-jointed character of 

 the mandibular palp. 



Gen. MACEOPETASMA, n. 

 A Penaeid with long stiletto-like terminals to the petasma. 

 Eostrum without ventral teeth. Peduncle of first antennae elongate, 

 both flagella I'ather long. Flagellum of second antennae longer than 

 the body. Second joint of mandibular palp large but distally 

 narrowed. Upper lip and lobes of lower lip broad. An epipod on 

 each of the first three peraeopods, an exopod only on the first. 

 Fourth and fifth peraeopods very slender. 



Macropetasma africanus (Balss). 

 Plate LXXII. 

 1913. Parapcnens africanus, Balss, Schultze's Forschungsreise in 

 Siid-afrika, vol. 5, pt. 2, p. 105, text-figs. 1-6. 

 The rostrum, which reaches just beyond the dark globular 

 eyes, has a variable number of dorsal teeth, 12 according to 

 Balss, 11 in a female, 8 in a male of our specimens; at some 

 distance behind the rostrum there is a small tooth. The sixth 

 pleon segment is more than twice as long as the fifth and 

 much longer than the telson,*which is very narrow, the sharply 



