718 T. R. R. STEBBING. 



The ciyptoniscus-stage, whether of this or some other species, was represented by three 

 specimens, smooth, narrow, sharply tapering to the uropods, the head broader than long, with 

 a pair of gleaming eyes. In describing Liriopsis pi/rfniaea (Rathke) Sars says, ' eyes very 

 distinct, each consisting of a dark pigment, within which is imbedded a single rather large, 

 refractive lenticular body.' The dorsal view which he gives of that species is in fair agree- 

 ment with the specimens now under notice, but in these the ocular pigment is not dark, 

 and the fourth and fifth peraeopods have not the peculiar shape characteristic of Liriopsis. 



The first and second gnathopods are compact, subchelate, with the fifth joint apparently 

 in coalescence with the sixth. The peraeopods are slender, all having the fourth and fifth 

 joints very small, the fifth triangular, underriding the sixth. The second joint is widest at 

 the middle and narrow at both ends ; the third, which is rather shorter but broader, is 

 narrow only at the ba.se ; the sixth like the second and third has a convex outer and more 

 or less straight inner margin ; near the apex of the latter it carries a fine spine and in the 

 first three pairs two minute sjjinules on the widened apical margin, but a single spine on 

 the comparatively narrow apex of the last two pairs. The finger is thin, slightly curved, 

 longer on the fourth and fifth peraeopods than on the three preceding pairs, but in none 

 longer than the sixth joint. 



The pleopods have a broad but short peduncle armed at the inner angle with two long 

 spines. The rami are short, not longer than the peduncle, each carrying four long plumose 

 setae, the outer which is the less robust having in addition a short plumose seta at the 

 outer angle. 



The uropods have short peduncles, quite as broad as they are long. The outer ramus, 

 scarcely longer than the peduncle, carries a long seta and two that are shorter. The inner 

 ramus, more than twice the length of the outer, tapers to the apex, which nearly agi'ees 

 with that of the outer ramus in armature. 



Length 1"5 mm., with a breadth of about 0'4 mm. 



ONISCIDEA. 



Fam. Ligiidae. 



Gen. Ligia, Fabricius. 



For references to the bibliography of tribe, family, and genus, the reader may be invited 

 to consult Willey's Zoological Results, Part 5, p. 645, 1900. 



13. Ligia exotica, Roux'. 



lAgia exotica, 1828, Roux, Crust, de la. Medit. et de son littoral, Livr. in. PI. XIII. fig. 9 ; 

 1885, Budde-Lund, Isopoda terrestria, p. 266. 



Budde-Lund, from whom the reference to Roux is taken, gives a full synonymy. The 

 single specimen in the present collection was a female without the uropods, the fiagellum 

 of the second antennae having about thirty-eight joints, the telsonic segment agreeing well 

 with Dana's figure of that part in the species which he names ' Li/g. gaudichaudii ?,' adopting 

 the specific name from Milne-Edwards. Budde-Lund puts both the French author's and Dana's 

 names in the sjaionymy of L. exotica. 



Loccdity. Lagoon, Minikoi. Taken along with Sphaeroma [Exosphaeroma ?] globicauda. 



' See "Land Crustaceans," by L. A. BorraJaile, Fauna Geoijr. Maldives, etc., vol. i. p. 98. 



