157 



PAGURID^E. 



PAGURID.E. 



158 



The species are numerous, and are divided by M. Milne-Edwards 

 into the following sections : 



Species whose ophthalmic ring is not armed above with a median 

 rostriform piece. 



A. Ocular peduncles large, and shorter than the basilary portion of 

 the external antennae. 



a. Spiniforni palp of the external antennae going beyond the extre- 

 mity of the ocular peduncles. 



P. Bernardtu, the Common Hermit-Crab, may be taken as an 

 example. It has the following characters : Hands strongly tuberculo- 

 grauulated ; terminal joints of the second and third pair of legs spinous 

 on the upper side, slightly tortuous. 



It is an inhabitant of the coasts of England, France, and of northern 

 Europe as far as Iceland. 



P. it rial tu. The anterior feet of this species are very large, espe- 

 cially that of the right side. They are covered nearly throughout 

 with transverse lines, which are curved, tubercular, and furnished with 

 small rather thick-set hairs on the upper part of the member ; many 

 of the tubercles of these sqiiamiforui lines acquire sufficiently large 

 dimensions to become large pointed spines. Colour red mixed with 

 yellow. Length from 7 to rather more than 8 inches. 



It is a native of the Mediterranean Sea. 



R. Ocular peduncles reaching beyond the basilary portion of the 



external antenna. 1 . 

 ". No roetriform prolongation on the anterior border of the 



carapace. 



P. deformii. Ocular peduncles very stout and short, rather longer 

 than the basilary portion of the external antenna;, but much shorter 

 thun the anterior border of the carapace ; cornea large, and occupying 

 half the length of the terminal joint of the ocular peduncles. Anterior 

 feet short and stout, especially on one side, smooth externally but spiny 

 ; a dentilated crest on the upper border of the larger moveable 

 finger. Succeeding feet smooth, and with but little hair, furnished 

 externally with a projecting crest, which extends over the two first 

 joints, and which, in the third foot, is very much developed and finely 

 ilentilated. Nothing similar on the opposite side. Abdomen furnished 

 with four large transverse plates, each with an oviferous false foot, the 

 first three of these are large, and terminated by three elongated and 

 ciliated lamina; in the female. In the male all these appendages are 

 small, and terminated by a single lamina. Length 5 inches. 

 It u a native of the Mauritius and the Seychelles. 



/ 



Ptigvnu ifrfui-tnir. 

 a, une of the muted cUws j the under ii!c of which i towards the p(ctiilor. 



Six other species are arranged by M. Milne-Edwards under this 

 nib-section, besides P. xinyuinolintui (Quoy and Gaim.), which he 

 believe* to be merely a variety of /'. yiutatun, and not to differ from 

 the P. Hungarvt figured by Herbst, pi. 23, f. 6. 



6. Anterior border of the carapace armed on the "edian line 

 with a more or leu projecting rostral tooth. 



c. So pairs of appendages on the anterior part of the abdomen. 



P. oculatus. Rostriform tooth scarcely developed. Ocular peduncles 

 shorter than the peduncular portion of the internal antenna;, but 

 longer than the anterior border of the carapace, and with their baailary 

 scales small, curved, nearly oval, and approximated. 



Found at Noirmoutiers. 



Ten other species are arranged under this sub-section, and P. Chit- 

 emis, one of these, which is nearly allied to P. clcyans, and inhabits 

 the coast of Chili, is here figured. 



faijuna Oliil, ftti't. 



c. f. Abdomen, with one or two pairs of appendages under its 



base. 



/'. 'inaculal'tu is an example, and four other species are arranged 

 under this sub-section. 



SS Species having the ophthalmic ring armed above with a move- 

 able rostriform tooth, which advances between the ocular 

 peduncles, and is denticulated on its edges. 



P. Milts and two other species are arranged under this sub-section. 



In Bele's ' British Stalk-Eyed Crustacea,' six species, besides /'. Ber- 

 nardm, are figured as British. There are P. Pndeauxii, which ia often 

 mistaken for P. Sernardut, P. Cuanensii, P. Ulidianus, P. Hyndmann, 

 P. larit, four small species described by W. Thompson, and P. Forbefii 

 of Bele. 



Ctnobita (Latreille). This genus, in the opinion of M. Milue- 

 Edwards, establishes the passage between the Pagwri, properly so 

 called, and Blrgnt. The abdomen ia conformable with that of 

 J'agurus ; the antenna) resemble those of Rinjux ; the carapace is 

 equally characteristic, for it is much more solid than it is found in 

 the Payui-i, is narrowed and compressed forward, and presents in its 

 posterior half a projecting border, which separates its upper surface 

 from the lateral portion, which descends vertically towards the feet. , 



Cnder eidc of carapace, &c. of Cenobitc (Cciiolila). 



The Cenobites, which are all the inhabitants of warm climates, aro 

 thus divided by M. Milne-Edwards. 



Species having the ocular peduncles nearly cylindrical, rounded 

 on the upper border, and terminated by a. hemispherical cornea 

 which reaches beyond the prolongation of the peduncular joint 

 received into the notch of its upper border. 



C. Dioyenet. Stomachal region hardly convex. Ocular peduncles 

 only of the length of the anterior border of the carapace, and nearly 

 triangular ; their basilary scale moderate anil oval ; tarsi very short ; 

 a trenchant nnd very projecting crest on the lower edge of the two 

 last joints of the third left foot. Length about three inches ; colour, 

 especially of the large claw, red or violaceous. 



It is a native of the Antilles. 



Only one other species is placed by M. Milne-Edwards under this 

 section. 



