CRUSTACEANS. 63 



ISOPODA. 

 ASELLID^. 



J^RA PUBESCENS, Dana. 



Jwra pubescens, Dana, United States Exploring Expedition, Crustacea, 744, pi. 49, 

 fig. 9, 1852. 



Associated with the following species upon rocky beaches, Kerguelen 

 Island. Dana's specimens were from Nassau Bay, Tierra del Fuego. 



SPH^ROMID^. 



Sph^roma gigas, Leach. 



Sphceroma gigas, Leach, Dictionnaire des Sciences naturelles, vol. xii, 346 (teste 

 Desmarest and Edwards). — Desmarest, Considerations gen6rales sur la classe des 

 Crust., 301, 1825. — Edwards, Histoire naturelle des Crust., vol. iii, 205, 1840. — 

 White, List of Crustaceans in British Museum, 102, 1847. — Dana, United States 

 Exploring Expedition, Crustacea, 775, j)!. 52, fig. 1, 18.o2. 



A large series of specimens of all sizesfrom 5™" to 29™°^ in length were 

 obtained, all the larger specimens from the gullets of terns, the smaller 

 ones from rocky beaches. All the specimens agree with the typical 

 gigas, and do not seem to approach the S. lanceolata, White, (Annals 

 and Magazine Nat. Hist., vol. xii, p. 345, 1843, and List of Crustaceans in 

 Biitish Museum, p. 102, 1847). 



SEROLIDJi]. 

 Serolis latifrons, White. 



Sc7^oUs latifrons, White. List of Crust. British Museum, 106, 1847 (no description); 

 Voyage of the Erebus and Terror, Crust., pi. 6, fig. 12. — Miers, Annals and Maga- 

 zine Nat. Hist, iv, vol. xvi, 74, 1875. 



Rocky beach, Kerguelen Island. 



Only one specimen was obtained. This is a female, and considerably 

 larger than the British Museum specimen. Our specimen diifers some- 

 what in outline and proportions from White's figure 5 but the differences 

 are very likely due to sex, although the sex of White's specimen is not 

 stated. The antennae are smaller than given in White's figure, the 

 peduncle being scarcely longer than the head and the first thoracic seg- 

 ment. The peduncle of the antennula reaches beyond the lateral angle 



