UROPTYCHUS PUBESCENS. 101 



Nearly allied to M. edwanlsii (Wood-Mason) * of the Bay of Beno-al, 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 31. hen. 

 dersoniana they are entire. 



UROPTYCHUS Hexd. 



Dipti/chus A. M. Edw., Bull. Mus. Comp. Zobl., VIII. 01, ISSO (noiii. praoc). 

 UroptycAus Hend , Rep. CLalleuger Anomura, p. 173, 1SS8. ' 



Uroptychus nitidus occidentalis Fax. 

 Flate XXVI., Fig. 1, F. 



Uroptj/chus nitidus occidentalis Fas., Bull. Mus. Comp. Zool., XXIV. 192, 1S93. 



Dipti/chus nitidus, var. occidentalis A. M. Edw. et Bouv., Anu. Sei. Nat , Zool., 7='°" Ser., XVI. 306, 1S94. 



Differs from the typical Uroptijclms nitidus (A. M. Edw.) t 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 I'espects U. uncifcr (A. M. Edw.), in which 

 the rostrum and chelipeds ai-e still shorter. U. politus 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, 4 mm. ; 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 flithoms. 2 males, 2 fem. ovig. 



Uroptychus pubescens Fax. 

 Plate XXri., Fi<j. 3, 3% 3'. 



UroptycAus pubescens Fax., Bull. Mus. Comp. Zool., XXIV. 192, 1S93. 



Biptychus pubescens A. M. Edw. et Bouv., Ann. Sci. Nat., Zool, 7""" Ser., XVI. 306, 1S94. 



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. 

 t Bull. Mus. Comp. Zool., VlII 02, 1880. 



