2s 



ISOPODA. 

 Apical sinus in male with prominent 



central lobe 3. 

 Apical sinus in male with central lobe 



very small or absent 5. 



I The medio-dorsal process with apex 

 o j simple. 



The medio-dorsal process with apex 

 bifid 4. 



r Outer ramus of uropods sub-apically 

 4 <^ notched. 



L Outer ramus of uropods not notched. 



I Apical sinus of pleon in male with 

 r ! very small central lobe. 



I Apical sinus of pleon in male without 



i. central lobe 6. 



f Surface of perseon conspicuously spinu- 

 lose 7. 

 Surface of perseon smooth or mode- 

 (. rately granular 8. 

 I Inner ramus of the uropods in male 



35 



1. C. latreillii, Leach, 1818. 



C. crassct, Haswell, 1882. 

 C. longispina, Miers, 1884. 



4. C. antennalis, Mieks, 1884. 



not shorter than the outer. 

 Inner ramus of the uropods in male 

 shorter than the outer. 



J Apex of medio-dorsal process not dis- 

 o I tinctly bifid 9. 



Apex of medio-dorsal process distinctly 

 I bifid 10. 



[ Apex of medio-dorsal process truncate, 

 g J slightly indented. 



Apex of medio-dorsal process truncate, 

 t slightly trifid. 



I Outer ramus of uropods in male with 

 . . I bifurcate apex. 



Outer ramus of uropods in male with 

 [_ simple apex. 10. 



'Apical sinus of pleon in male with 



minute central lobe. 11. 



} Apical sinus of pleon in male with 

 large central lobe 12. 

 Apical sinus of pleon in male without 

 central lobe 13. 



p 2 



5. C. spinulosa, Haswell, 1882. 



6. C. hystrix, Haswell, 1882. 



7. C. caniculata (Thomson), 1879. 



8. C. granulata, Whitelegge, 1902. 



9. C. tenuicaudata, Haswell, 1881. 

 C. whiteleggei, n. sp., 1905. 

 C. sculpta (Holmes), 1904. 



