ISOPODA. 31 



Uropoda similar iu both sexes, rami lamellar, exopodite cousiderably shorter 



than cudoixxlite. 

 Mouth parts similar iu both sexes. 



Male with appeudix masculiua ou the eudopodite of the second pleopod. 

 ^Farsupial lamella3 overlap each other somewhat, the brood in an exceedingly 



large external pouch and iu the marsupium. 



Cymodocella tubicauda. 



Cymoilocella tuUcawla Pfeffer (11), pp. im-lir). 



Sphirromn egreyiian Chilton (2), p. 20!). 



Ci/moilocea antarctiar Ilod^rson (8), pp. •21:^-2 tTi. • 



CijmoiloreUd fgregia Iliinsen (7), p. 120; Richardson (12), p. 7. 



This .species was first described by Dr. Pfetf'er from .specimens taken in South 

 Georgia. It was then found by Dr. Chilton in New Zealand — the South Islaml ; 

 more recently it was takeu by the 'Southern Cro.ss ' Expedition in the Autikland 

 Islands. 



On all these occasions it has been more or le.ss perfectly described as a new .species. 

 It now turns up off the Antarctic continent at Cape Adare, and it is hoped that its 

 identity is now fully and permanently established. As my description of the animal 

 was so un.satisfactory it is here re-dcscribed. It is a little unfortunate that both 

 Dr. Hansen and Mi.ss Richardson have made use of Dr. Chilton's name for the species. 

 That of Dr. Pfeffer has a priority of five years. 



Specific characters : — 



Body vaulted, cephalosomc short, with small dorso-hiteral eyes. 

 Antenna invisible from jiliovc. 



Pereiopoila ambulatory, first the shortest, the remainder very slightly increasing in size, armed 

 with a stout cnrved claw on the dactylus and one, occasionidly two, stumpy accessory ones. 



Metasome, always witli one distinct segment, and two others imperfectly separated dorsally ; a 

 pointed tubular urosome. 



The cephalosomc is small, rather broad but short, the anterior margin, seen from 

 above, is rounded, it bends downwards and terminates with a small rounded rostrum 

 between the antennae ; the lateral margins bulge for the reception of the small eyes 

 which are postero-laterally situated ; the posterior margin is iniiurvcd. It is about 

 two-thirds the diameter of the first segment of the meso.some. 



The mesosome comprises the normal seven segments of which the first is the 

 longest and largely envelops the cephalo.some, the epimera are large, ending 

 posteriorly in a blunt point. The succeeding three .segments are .subequal in length, 

 with rather small irregularly rounded epimera. Of the three posterior ones the first is 

 a little .shorter than the other.s. The epimera are larger and project liackwards, the 

 last of the three .segments is narrower than the rest, and the posterior border of the 

 epimera rises abruptly from its segment. In no case are the epimera .separable from 

 their respective .segments. 



