studies on marine Ostracods 24o 



claws is perhaps, on tlie average, somewhat weaker, though only slighth" so, than in the 

 species mentioned. 



The frontal organ, upper lip and lateral eyes are similar to those 

 of the preceding species, 



Male: — 



Shell: — This agrees both in shape and length with the male sheU of the preceding species. 



With regard to the other organs but little information can be given, as they were in so 

 damaged and dirty a condition in the only specimen accessible that it was impossible to carry 

 out a detailed investigation with any certainty. As far as could be seen, the exopodite of 

 the second antenna, the mandible, maxilla and fifth, sixth and seventh limbs seemed to agree 

 closely with these organs in the female. The endopodite of the second antenna was very like 

 this organ in the male of the preceding species. 



Habitat: — 



Falkland Islands: 



S. A. E. Station 58, lat. 52o 29' S., long. 6U" 36' W. (type locality); 11. IX. 1902; 

 depth, 197 m. ; sand and gravel; temperature at the bottom, +4,1° C. : several mature females 

 and larvae of different stages; R. M. S. 147. S. A. E. Station 59, on the Burdwood Bank, lat. 

 53" 45' S., long. 61" 10' W.; 12. IX. 1902; depth, 137—150 m.; mussel sand with scattered stones: 

 3 juvenes; R. M. S. 149. 



Tierra del Fuego: 



S. A. E. Station 60; east mouth of the Beagle Channel, lat. 55" 10' S., long. 66" 15' W'.; 

 15. IX. 1902; depth, 100 m.; bottom of broken shells; temperature at the bottom +5,0" C. : 

 12 mature females, 1 mature male and about 50 larvae of different stages; R. M. S. 148. S. A. 

 B. Station 62, Beagle Channel, lat. 54" 53' S., long. 67" 56' W.; 16. IX. 1902; depth, 140 m.; 

 clay mixed with sand: 1 mature female; R. M. S. 150. S. M. E., Puerto Condor; 26. II. 1896; 

 depth, 72 m.: 2 mature females; R. M. S. 146. S. M. E., Puerto Harris; 11. III. 1896; deptli 

 27 m.; bottom of dead shells: 1 mature female and 3 larvae; R. M. S. 145. S. M. E., Cap 

 Valentyn; 12. III. 1896; depth 270 m.; bottom of dead shells: 5 mature females; R. M. S. 144. 



Type-specimen, on slides, R. M. S. 



Sub-Genus Vargula n. sub-gen. 



Cyfridina (part.), a u t o r u m. 



Description: — Shell: — The shape is somewhat, though rather slightly, different 

 in males and females. — It is oval, with or without a weakly developed posterior comer. 

 The rostral incisur is most frequently narrow and comparatively deep, only in exceptional 

 cases quite shallow. Near the inner edge of the incisur there are two medial bristles situated close 

 to each other. With ratlier strong calcification. All the species hitherto known are rather large. 



