ON CRUSTACEA BROUGHT BY DR WILLEY FROM THE SOUTH SEAS. 647 



1810. PInloscia, Latreille, Consid. gen. Crust., Arachnides, Insectes, p. 110. 



1813. Philoscia, Leach, Edinb. Encycl. (Art. Crustaceology), vol. 7, p. 406. 



1825. Philoscia, Desmarest, Consid. gen. Crustaces, p. 318. 



1833. Philoscia, J. F. Brandt, Bull. Soc. Nat. Moscou, vol. 6, p. 182. 



1840. Philoscia, Milne-Edwards, Hist. Nat. Crust., vol. 3, p. 1G3. 



1868. Philoscia, Bate and Westwood, Brit. Sess. Crust., vol. 2, p. 448. 



1880. Philoscia, Harger, Rep. U. S. Comm. Fisheries, pt. 6 for 1878, p. 30.5. 



1885. Philoscia, Budde-Lund, I.sopoda terrestria, pp. 201, 207. 



1893. Philoscia, Stebbing, History of Crustacea, Internat. Sci. Ser., vol. 74, p. 430. 



1897. Philoscia, Dollfus, Feuille des Jeunes Naturalistes, Ser. 3, 27'= Annee, No. 317 

 (Tableau icon, des Philoscia d'Europe). 



1898. Philoscia, Sars, Crustacea of Norway, vol. 2, p. 172. 



1900. Philoscia, Harriet Richardson, The American Naturalist, vol. 34, p. 303. 



In this genus the antennae are comparatively smooth, the first maxillae have 

 several spines on the apex of the outer plate, and the inner ramus of the uropods 

 is slender, these being characters in which it differs from the genus next to be dis- 

 cussed. 



Philoscia gracilis, Budde-Lund. 



1879. Philoscia gracilis, Budde-Lund, Prospectus Crust. Isop. terrestrium, p. 2. 

 1885. Philoscia gracilis, Budde-Lund, Isopoda terrestria, p. 220. 



A single specimen, without antennae or uropods, appears to belong to this species, 

 which I only know from the second work above cited. 'The fifth segment of the 

 peraeon almost entirely black-brown' among the others that are much marbled with 

 white is rather a striking characteristic. The length of the specimen, however, is only 

 about 6 mm., whereas Budde-Lund's from the Island of Upolu was 10 mm. 



Habitat. Lifu, Loyalty Islands. 



Philoscia truncata, Dollfus. 



1898. Philoscia truncata, Dollfus, Zool. Ergebn. Niederlandisch Ost-Indien, vol. 4, 

 p. 376, pi. 15, fig. 23, and in text fig. 23 o, 23 6. 



The .shape and colouring of the specimens agree very exactly with the figure on 

 Dollfus' plate, the seventh segment of the peraeon having the postero-lateral angles 

 notably truncate, with the whole of each corner pale in contrast with the dark hue 

 otherwise prevailing. A specimen 8 mm. in length, which is the length given by Dollfus 

 for specimens from Celebes and Flores, has the caudal segment apically .sub-obtuse ; 

 in a smaller specimen, only 5 mm. long, this segment would rather be described as 

 obtuse at the apex. 



Habitat. New Britain. 



