532 J. R. Henderson — Some " Tnve&itjator " TacjuruUe. [No. 3, 



The length of the hand is not quite twice its breadth. In the la: _ 

 specimen the joints of the chelipede are almost smooth, there being 

 only a faint denticulation, or almost granulation, visible on the margins 

 of the hand and fingers, but in other specimens there is a regular 

 minute serration, and in these c.uses the margins are thinner or less 

 rounded. In some cases minute granules are visible on the tinder 

 surface of the hand and wrist. In one or two examples the tip of 

 the dactylus is bent under that of the immobile finger. The smaller 

 or left chelipede extends to about the middle of the hand of the larger 

 chelipede, and in some cases even to the articulation of the dactylus. 



The ambulatory legs are unarmed, though faintly pubescent, 

 especially the terminal portions of the dactyli. The dactyli are not 

 quite twice the length of the propodi. 



The gills are similar to those of P. andersoni, but the lamellae 

 are narrower. The eggs are moderately large, and the oviducal 

 opening of the female is, as usual in the genus, present only on the 

 left side. 



The largest specimen is a female with ova, which measures as 

 follows : — 

 Length of body* ... ... ... ... 16 mm. 



„ ,, carapace ... ... ... ... 5o „ 



,, ,, right chelipede ... ... ... 10'5 .. 



„ first right leg ... ... ... ... 16 



The chief feature of the species is its small size. Although the fact 

 that some of the females carry ova is not in itself sufficient to indicate that 

 they have attained their maximum size, yet I think it may be safely 

 assumed that by this time they have developed all the leading specific 

 characters. In some Pagurids, notably the common European Enpa gurus 

 bcmliardus, (Linn.) considerable differences may be observed in the 

 size of egg-bearing females. 



Genus Sympagurus, S. I. Smith. ' 

 This genus according to A. Milne-Edwards and Bouvier. is distin- 

 guished from Parapagurus solely by the arrangement of the gills, which 

 are biserial and not quadriserial, and in the opinion of these obervers 

 the two genera ought probably to be united. A connecting- link occurs 

 in the S.nudus, A. Milne-Edwards, taken by the " Hirondelle." in which 

 at the base of each branchial lamella there is an external rudiment u-v 

 lamella, and if the latter were somewhat larger the gill would resemble 

 that of a Parapagurus. The evidence furnished by this species, tends at 



* Owing to the species inhabiting a Dentalium shell, the body — unlike that of 

 most Pagurids— is fully extended. 



