Crustacea from the China Sea. 77 



This species is very distinct from all known to me, and is 

 to be at once recognized by its enormously long and diver- 

 gent rostral spines and by the long and slender spinule which 

 is situated at the distal extremity of the merus of the first 

 pair of legs. It somewhat resembles Hyastenus oryx of A. 

 Milne-Edwards *, but differs in the armature of the cephalo- 

 thorax and in its long and diverging rostra. In possessing 

 two median, large, erect spines on the cardiac lobes of the 

 carapace it appears to be allied to Naxia hystrix and to Naxia 

 elegans. 



16. Naxia tauruSy sp. n. 



Carapace pyriform, with gastric, cardiac, and branchial 

 regions well defined by conspicuous smooth sulci ; the whole 

 surface covered with distinct though close-set minute tufts of 

 hair, amongst which, especially in the gastric and branchial 

 regions, project a few longer and coarser hairs ; the rostral 

 spines long and diverging, i. e. each spine is considerably 

 longer than half the length of the carapace, and the distance 

 between the tips of the spines is a little more than three 

 quarters the length of each, coarsely and sparsely hairy in 

 the proximal half of the inner surface, the additional spine 

 is large and situated far from the apex near the middle, but 

 in the distal half of the upper surface ; antennal spine long 

 and strong, but less strong than the superior orbital spine ; 

 the external half of the orbital margin is bidentate above and 

 hairy on the inner surface ; the superior interorbital area is 

 furnished with two subparallel longitudinal series of tubercles, 

 which extend, increasing in size from before backwards, almost 

 from the base of the rostrum to the gastric region ; gastric 

 region armed with many symmetrically-disposed tubercles ; 

 three of these are very large and situated in the middle line, 

 on each side of the anterior and posterior of these are two 

 transversely disposed smaller tubercles, and in addition there 

 are several still smaller tubercles scattered about ; the ante- 

 rior half of the cardiac region furnished with a cluster of 

 small tubercles and the posterior half with three larger 

 tubercles arranged in the form of a triangle ; the hepatic and 

 lateral portions of the branchial region covered with many 

 small tubercles, the upper portions of the branchial region 

 armed with fewer tubercles — on the epibranchial portion there 

 is one large tooth and on the inner side of this a few smaller 

 close-set tubercles, and on the metabranchial portion two or 

 three widely separated small tubercles and a larger external 

 tooth. 



* jNouv. Arch. Mus. viii. p. 250, pi. xiv. fig. 1. 



