834 MAJOR ALCOCK. 



Nematopagurus, Edw. and Bouv. 



This genus resembles Eupagurus on the one hand and Catapagurus on the other, but dififers 

 from both in the rather remarkable character — a character shared also by Pi/lopagurus, Pylo- 

 paguropsis, and Munidopagurns — that the female only (not the male) has a pair of appendages, 

 modified for sexual purposes, on the first abdominal segment. 



It agrees with Catapagurus in having the vas deferens of the right side protruded, but 

 the protruded tube ends in a long slender filament : moreover the left vas deferens also 

 protrudes, though it forms only a short conical tube. 



Five species of Nematopagurus are found in the seas of India, mostly in the sublittoral 

 depths; the only other species known is Nematopagurus longicorms, Edw. and Bouv., from 

 depths of about 42 to about 1410 fathoms of the Eastern Atlantic (from the North of Spain 

 to Cape Verde) and the Western Mediterranean. It is a remarkable fact — one of many similar 

 facts of distribution that will be discussed in a forthcoming volume on the Indian Paguridae — 

 that this Atlantic and Mediterranean species differs in only a few trifling particulars from a 

 species found at 102 fathoms in the Arabian Sea. 



18. Nematopagurus muricatus. Henderson. 



Catapagurus muricatus, Henderson, Journ. Asiatic Soc. Bengal, LXV. Pt ii. 1896, p. 524. 



Illustrations of the Zool. of the Investigator, Crust. PI. XXXI. fig. 3. 



Two males and a female from the Maldives. 



Distribution. Maldives; off N.E. and S. coasts of Ceylon, 28—34 fathoms. 



19. Nematopagurus gardineri, n. sp. PL LXVIII. fig. 3. 



Resembles N. indicus, but has much longer eyestalks and more pilose chelipeds. 



Carapace smooth, rostrum indistinct. Eyestalks as long as the anterior border of the cara- 

 pace, longer than the antennal peduncles, and reaching to the distal fourth of the terminal 

 joint of the antennular peduncles. Eyes not much expanded: ophthalmic scales very small, 

 bifid at tip. Antennal acicle curved, setose, nearly reaching the end of the peduncle : flagellum 

 long, nude. 



Chelipeds thickly pilose, especially so on the outer surface of the wrist and palm ; the right 

 is a little larger than the left, but both are almost alike in form and sculpture: the carpus 

 has an iridescent sheen, its inner edge is spinose, and there is a median longitudinal row of 

 spines on its outer surface : both edges of the palm are well defined and serrulate, and there 

 is a median longitudinal carina on the outer surface of the palm: the palm is slightly longer 

 than broad, longer than the fingers in the right cheliped, and about as long as the fingers 

 in the left. 



Second and 3rd legs nearly a dactylus longer than the chelipeds : they are sparsely setose 

 and except for a spine at the far end of the anterior border of the carpus are unarmed: the 

 dactyli end in a sharp claw and have some capillary spinelets on their posterior border: the 

 dactylus of the 3rd pair is about as long as the combined merus and carpus. 



The paired appendages of the first abdominal somite of the female are slender, curved 

 rods. 



Length of carapace of an egg-laden female, 5 mm. 



A single specimen, inhabiting a shell of a Cerithiid, from the Maldive Is. 



