40 THE VOYAGE OF H.M.S. CHALLENGER. 



Genus Albiinea, Fabricius. 



Albunea, Fabricius, Suppl. Ent. Syst., pp. 372, 397, 1798. 



Milne-Edwards, Hist. Nat. des Crust, t. ii. p. 202, 1837. 

 „ Miers, Journ. Linn. Soc. Lond. (ZooL), vol. xiv. p. 326, 1877. 

 Alhunxa, Stimpson, Proc. Acad. Nat. Sci. Philad., p. 68, 1858. 



Carapace subquadrate, the frouto-orbital border serrated, with a median notch. 

 Ocular peduncles lamellar, the cornete minute. Antennular peduncle of large size, with 

 a single long ciliated flagellum which exceeds the whole body in length. Antennae with 

 a well-developed peduncle of five joints, the second joint with a movable acicle ; the 

 flagellum short and stout. External maxillipedes moderately slender, the merus oblong 

 and not greatly exceeding the carpus in length. Dactyli of second, third and fourth pairs 

 of legs uncinate. Last thoracic segment free. Female with four pairs of abdominal 

 appendages in addition to the penultimate pair. 



Albunea microps (White), Miers. 



Albunea microps, White, liist Crust. Brit. Mus. Appendix, p. 129, 1847, siiK descr. 



„ ,, Miers, Journ. Linn. Soc. Lond. (Zool.), vol. xiv. p. 328, pi. v. figs. 12, 13, 



1877. 



Habitat. — Station 212, Celebes Sea; depth, 10 fathoms; bottom, sand. Three 

 specimens, two of these unfortunately much crushed. 



The unique specimen in the collection of the British Museum came from Sooloo 

 Island. 



PAGURIDEA. 



Paguroidss, Boas, Vidensk. Selsk. Skr. 6 Etekke nat. og math. Afd. i. 2. p. 110, 1880. 



Frontal region of carapace usually prolonged in the form of a rostrum. Eyes not 

 provided with distinct orbits, the peduncles cylindrical or subcylindrical. Antennal 

 peduncle composed of five segments, the second segment furnished with a projecting spine 

 or acicle. External maxillipedes subpediform, the meral and ischial joints elongate. 

 Chelipedes well developed and in most cases asymmetrical ; the last pair of legs always 

 of smaU size and frequently chelate. Abdomen generally as)Tnmetrical, the number of 

 appendages variable. 



The close affinity which exists between the Lithodids and Pagurids, although 

 previously noticed by De Haan, has been up till within comparatively recent times 

 entirely ignored by carcinologists. In 1880, Dr. J. E. V. Boas pointed out that 



