248 Annals of the South African Museum. 



LlTHADIA BARNARDI, 11. Sp. 



Plate CI. 



The rather narrow f font is scarcely emarginate. It projects a little 

 beyond the small eyes, but being slightly upturned may, according to 

 the point of view, appear to be on a level with them. The specimen 

 figured must be considered abnormal, the antero-lateral wing on the 

 right of the carapace having no counterpart on the left. After the 

 drawing of the plate, two specimens, a male and a female, were 

 examined and showed no trace of such an unusual outgrowth. The 

 whole surface of the carapace is covered with tubercles, diversified 

 by prominent lamellae, six of which in the male are arranged in a 

 forward curve across the middle. In the female the number is 

 reduced to four by coalescence in the two outer pairs. Behind this 

 row in the centre line two other lamellae are placed a large one near 

 the hind border and a smaller intermediate. The pleou of the female 

 specimen figured firmly enclosed a great number of eggs. The first 

 six segments form a very broad oval, smoothly trilobed, the third to 

 the sixth coalesced, but with suture-markings, the telson triangular, 

 very small. In the male the pleon from the third segment to the apex 

 is narrowly triangular. 



The mandibles have a small three-jointed palp. The inner plate 

 of the first, maxillae is small and curved, palp-like, but in the wrong- 

 position ; the palp was not satisfactorily made out. In the third 

 maxillipeds the fourth joint is much more than half the length of the 

 third and extends considerably beyond the long joint of the exopod- 

 The opaque parts of these maxillipeds are tuberculate on the outer 

 lower surface and the exopod is longitudinally grooved on its inner 

 upper surface. 



The fingers of the first peraeopods (chelipeds) close completely with 

 the apices crossing ; the palms are longer than the fingers and stout, 

 but longer than broad ; they are slightly tuberculate, but the three 

 preceding joints, especially the long fourth joint, strongly so. The 

 second to the fifth pairs of peraeopods are small, with the fourth, 

 fifth and sixth joints tuberculate, the fingers setulose. 



The carapace of the specimen figured measured approximately 

 9 mm. long, 9' 5 mm. broad ; the female from the second locality 

 9 mm. long, 11 mm. broad, and the accompanying male 8 mm. long, 

 9 mm. broad. 



Localities. Umhloti River, N.W. by W. 2f miles ; depth 25 fathoms. 

 A 504. 32 53' S., 28 12' E. ; depth 45 fathoms. A 508. 



