UROPTYCHUS PUBESCENS. 101 
Nearly allied to M. edwardsii (Wood-Mason) * of the Bay of Bengal, but 
easily distinguished from that species by the lateral margins of the carapace, 
which in Wood-Mason’s species are divided into two lobes, whilst in Jf. hen- 
dersoniana they are entire. 
UROPTYCHUS Henp. 
Diptychus A. M. Epw., Bull. Mus. Comp. Zoél., VIII. 61, 1880 (nom. preoc). 
Uroptychus Henv , Rep. Challenger Anomura, p. 173, 1888. 
Uroptychus nitidus occidentalis Fax. 
Relate Xi XGVIS Baga le 
Uroptychus nitidus occidentalis Fax., Bull. Mus. Comp. Zodl., XXIV. 192, 1893. 
Diptychus nitidus, var. occidentalis A. M. Epw. et Bovv., Ann. Sci. Nat, Zool., 7¢™° Sér., XVI. 306, 1894. 
Differs from the typical Uroptychus nitidus (A. M. Edw.) + as follows: the 
branchial regions are more swollen, giving to the posterior half of the cara- 
pace a more convex lateral outline ; the rostrum is shorter, the chelipeds 
shorter and more robust, the fingers shorter in proportion to the length of 
the basal part of the propodite ; the branchial regions are more distinctly 
margined. It approaches in some respects U. uneifer (A. M. Edw.), in which 
the rostrum and chelipeds are still shorter. U. poditus Hend., another closely 
related form, is distinguished by its short antennal acicle. 
Length of body of a female, 29 mm. ; length of carapace, 15 mm. ; length 
of rostrum, 4mm. ; breadth of carapace between antero-lateral spines, 5 mm. ; 
breadth across the branchial region, 10 mm.; length of cheliped, 44.5 mm. 
(merus, 11 mm., carpus, 12.5 mm., chela, 17.5 mm., dactylus, 6 mm.). 
Station 3384. 458 fathoms. 2 males, 2 fem. ovig. 
Uroptychus pubescens Fax. 
Plate XX VI, Fig. 3, 3%, 3. 
Uroptychus pubescens Fax., Bull. Mus. Comp. Zodl., XXTV. 192, 1893. 
Diptychus pubescens A. M. Evw. et Bovv., Ann. Sci. Nat., Zool., 7°m® Sér., XVI. 306, 1894. 
Carapace, without including rostrum, broader than long, pubescent; a 
transverse row of spines across the gastric region from one side of the cara- 
pace to the other; lateral border of carapace spinose ; the anterior margin 
* Ann. Mag. Nat. Hist., 6th Ser., VII. 201, 1891. 
+ Bull. Mus. Comp. Zodl., VIII. 62, 1880. 
