534 J. R. Henderson — Some "Investigator" Pdguridte, r No. 3, 



incurved, and the upper margin of the dactylus is strongly dentate. 

 The left chelipede is slender and almost smooth, with the carpus con- 

 siderably longer than the hand, and the fingers about equal in length 

 to the palm. 



The ambulatory legs are practically smooth, only a few marginal 

 hairs being present. The anterior margin of the meri is faintly tuber- 

 cular, and in some specimens there is a denticle at the anterior distal 

 end of the carpus. The dactyli are about one and a half times the 

 length of the propodi. 



The gills are biserial, without any trace of outer lamellae ; the 

 inner lamellae are long and somewhat narrow, resembling those of 

 S. pilimanus, A. Milne- Edwards, as figured by Milne-Edwards and 

 Bouvier, in their Report on the " Blake" Paguridae. 



An adult male gives the following measurements : — 

 Length of body ... ... ... ,.. 17 mm. 



„ „ right chelipede ... ... ... 20 ,, 



„ „ left chelipede ... ... ... 15 ,, 



„ „ third light leg ... ... ... 27 „ 



„ „ eye-stalk ... ... ... ... 25 ,, 



This species is closely allied to Parapagurus gracilis, Henderson 

 (which is probably a Sympagurus), taken by the " Challenger " off 

 Pernambuco, at a depth of 350 fathoms. It agrees with the latter in 

 the character of its eye-stalks, but the dilatation of the corneae is 

 somewhat greater in S. monstrosus. It differs, however, in the more regu- 

 lar denticulation of its hand, while this part is also considerably broader 

 in the " Challenger " species. It also bears considerable resemblance 

 to 8. arcuatus, A. Milne-Edwards and Bouvier, from the West Indies, 

 in which however, the larger hand is more distinctly granulated on the 

 upper surface, and the carpus presents a row of denticles on its upper 

 surface, bordering the articulation of the hand. Subsequent investiga- 

 tion may possibly show that all three species are identical. 



Undetermined species. 



15. Glibanarius sp. 



Great Sober Island, Trincomallee Harbour. Four small speci- 

 mens. 



The largest example measures only 20 mm. in total length, and all 

 are obviously very young. They probably belong to some common 

 litoral species. 



16. Eupagurus sp. 



Station 151, off the coast of Ceylon, depth 142 to 400 fathoms 



