6 W. T. CALMAN. 



For the purpose of comparison, I have examined a series of specimens of 

 C. verrucosa from the West of Ireland and from the Mediterranean ; those from 

 the latter locality include some determined by Prof. Sars himself. These specimens, as 

 I have elsewhere noted, show considerable variation among themselves and differ in 

 some points from Prof. Sars's figures and description. In view of this variation, it 

 does not seem possible to attribute specific value to the characters which distinguish 

 the Antarctic from the northern specimens, more especially since I have only very few 

 fully adult specimens of the latter. 



Campylaspis nodulosa, described by Prof. Sars from specimens obtained by the 

 ' Challenger ' at Kerguelen, is very similar to the present species, but the type 

 specimens, although of large size (3*75 mm. in length according to my 

 measurements *), are without any trace of the last pair of legs, and may, therefore, 

 be presumed to be immature. The smallest specimens of C. verrucosa which I have 

 seen are about 2'5 mm. long, and have the last legs already fully developed. The 

 smallest of the ' Discovery ' specimens are about the same size as the types of 

 C. nodulosa, and they agree in all essentials with the adults. It is likely, therefore, 

 that before attaining the adult state the Kerguelen form must grow to a size 

 greatly exceeding that of the ' Discovery ' specimens, and it will be necessary to 

 wait until adult specimens are obtained before deciding what value is to be attached 

 to the characters distinguishing it. The most important of these characters are the 

 smaller relative size of the carapace, which is less than one-half of the length of the 

 body, and the absence of any tubercles or teeth on the dorsal surface of the abdominal 

 somites. 



Occurrence: 'W.Q., Aug. 29, 1903, Sept. 8, 1903, and Feb. 13, 1904.' Many 

 specimens. 



EXPLANATION OF THE PLATE. 



Fig. 1. Eudorella similis, sub-adult female, from the side, appendages omitted. 



2. ,. front margin of carapace. 



., 3. antennule, 3a, inner ramus of same. 



4. adult male, front margin of carapace. 



,, 5. terminal part of antennule. 



6. sub-adult female, last somite and uropod. 



7. Ctimella australis, adult female, from the side. 



8. from above. 



9. first leg. 



10. second leg. 



11. third leg. 



12. fifth leg. 



13. last somite and uropod. 



14. Campylaspis verrucosa, var. antarctica, adult female, from the side, appendages omitted. 



15. from above. 

 ,,16. last somite and uropod. 



* Sars says " Nearly 5 mm.," which is a little too much, even if the uropods be included. 



