712 DR. W. T. CALMAN ON DECAPOD [June 15,, 



pair of walking legs are a little longer than the cai-apace and 

 rostrum. The clactyli are slender, curved, and very sharp -pointed,, 

 with two or three teeth near the base on the lower edge. 



An ovigerous female specimen measures 12 mm. in length to 

 base of rostral spines, by 9 mm. across the widest part of the 

 carapace. 



Remai^ks : — This little crab, which I have failed to identify with 

 any described species, differs from the usual type of Hyastenus by 

 the comparatively slight development of the supra-orbital margin. 

 In this character and in the narrowness of the basal antennal 

 segment it seems to approach the American genus Felia, from 

 which, however, it differs in the absence of a tooth at the distal 

 end of the same segment. As there are considerable differences 

 in the relative development of these parts in the various species of 

 Hyastenus, the new species may provisionally be placed in that 

 genus. 



Hyastenus uncifer, sp. n. (Plate LXXII. figs. 8, 9.) 



Carapace sub-pyriform, pointed behind, tomentose, tuberculate. 

 There is a transverse row of five tubercles (the outer pair the 

 largest) on the gastric region and, behind this, a single median 

 tubercle ; the cardiac region is convex and the intestinal region 

 bears two tubercles, the posterior one acute and recurved ; there 

 is a very prominent hepatic spine, and the branchial i-egions bear 

 each several tubercles and a procurved epibranchial spine. The 

 rostral horns are equal to, or a very little shorter than the carapace 

 (in the male), slender, divergent, and gently decurved. The supra- 

 ocular eave is acutely produced anteriorly ; there is no inter- 

 mediate tooth between it and the post-ocular process, which is not 

 expanded distally. The basal antennal segment has a sharp spine 

 at the antero-external angle. 



The chelipeds (in the female) are slender, with two or three 

 spines on the carpus ; the fingers are less than half the length of 

 the palm and meet for the greater part of their length. 



The walking legs are slender, with a few granules on the carpus, 

 and with the dactylus armed with a row of stout recurved spines. 



A female specimen measures 11 mm. in length to the base of 

 the rostral spines. 



Remarks: — In the length of the rostral horns this species 

 approaches IT. brockii de Man, but has the carapace more tubercu- 

 late and more pointed behind. The very prominent hepatic 

 spine and the strong hooked teeth on the dactyli of the walking 

 legs are unlike those of any species with which I have been able 

 to compare it. 



Tylocarcinus gracilis Miers. 



T. gracilis Miers, Ann. Mag. Nat. Hist. (5) iv. p. 15 (1879). 



In describing this species, Miers suggested that it might 

 " perhaps prove to be only a variety " of T. styx (Herbst). The 

 numerous specimens collected by Dr. Andrews, howevei*, show no 



