South African Crustacea. 247 



Alcock notes that in this genus the fourth joint of the third 

 maxillipeds is not much more than half the length of the third 

 joint measured along the inner border, while in Ebalia, it is a 

 great deal more than half that length. Leach notes that in 

 Ebalia it is the last pleon segment that carries a dentiform 

 process, but in Nursia the penultimate segment. These con- 

 siderations point to the inclusion of the species here described 

 in the genus Nursia. 



NURSIA SCANDENS, n. sp. 

 Plate CVlA. 



In general appearance it will be seen that this species is not unlike 

 that described and figured as Ebalia jordani, n. sp., by Miss Rathbun 

 in 1906 (U.S. Fish. Comm., p. 889, pi. 15, fig. 3, text-figs. 43, a, b), 

 where the pleon is of the Nursia type, but the maxilliped is un- 

 described. In our species the fourth joint of the maxilliped is less 

 than half the length of the third joint, the chelipeds are more slender, 

 with the fingers more slender, as they shoiild be for the Nursia form, 

 and for the ambulatory limb in the single one that was present the 

 finger is relatively much longer than in Ebalia jordani. The latter 

 appears to be a much larger form length of male type ll - 4 mm., 

 width 11 '2 mm. ; whereas our specimen, evidently by its pleopod an 

 adult male, is in middle line of the carapace only 4'5 mm. long, with 

 a width of 5 mm. ; between the front, and hind processes the length 

 about equals the width. E. salamensis, Dofleiu, 1904, seems to be 

 distinguished by its pleon. 



Locality. Cove Rock, N.W. f W. 13 miles ; depth 80-130 fathoms. 

 Specimen apparently climbing in a small thicket of Cerataisis ramosus, 

 Hicksou. A 4049. 



GEN. LITHADIA, Bell. 



1855. LUhadia, Bell, Tr. Linn. Soc. London, vol. 21, p. 305. 

 1860. ,, Stimpson, Ann. Lyceum. Nat, Hist. Mus. York, vol. 7, 

 p. 238. 



1870. Stimpson, Bull. Mus. Comp. Zool., vol. 2, pt. 2, p. 159. 



1871. ,, Stimpson, Ann. Lyceum. Nat. Hist. New York, vol. 10, 



p. 115. 



1872. Ebalia (Lithadia), von Martens, Arch. Naturg., vol. 38, pp. 114, 



115. 



1886. LUhadia, Miers, Rep. Voy. Challenger, vol. 17, pt, 49, p. 318. 

 1901. M. J. Rathbun, U.S. Fish. Comm. for 1900, vol. 2, p. 88. 



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