Distribution of the British Ostracoda. 55 



can scarcely do otherwise than regard it for the present as a 

 new marine form. The single specimen in our gathering is, 

 unfortunately, only an empty shell ; so that we cannot speak 

 confidently as to its generic position. 



In the Ilfracombe list the chief point of interest is the oc- 

 currrence of Cytlieropteron pyramidale (Brady), a species new 

 to Britain, but perhaps too nearly allied to G. latissinmm to 

 be altogether satisfactory. The species was originally de- 

 scribed from Norwegian examples, in No. 1 of these " Contri- 

 butions." Amongst the specimens which we here assign to 

 Cytherideis sidiidata are some of an unusually large size and 

 of slightly more tumid and arcuate outline than the typical 

 form ; but whether these diiferences are sexual or varietal, or 

 whether they constitute an altogether distinct species, we are 

 not, owing to the emptiness of the shells, able decidedly to say. 

 One of these is figured in PI. I. figs. 12, 13 ; fig. 13, however, 

 is unsatisfactory, the outline being too nearly ovate, and not 

 attenuated sufficiently in front. 



Cypris 'prasina^ Fischer. 



The species named by us in a previous paper (" On the 

 Ostracoda and Foraminifera of Tidal Rivers") C. fretensisy 

 appears to be properly referable to C. prasina, though the 

 term, signifying a shade of green, is a misnomer as regards 

 our specimens, which are in all cases of a dirty white. 



Cyj)ris{?) cambrica, n. sp. PI. I. figs. 3, 4. 

 Carapace, as seen from the side, subtriangular ; greatest 

 height behind the middle, and equal to half the length ; ante- 

 rior extremity obtusely, posterior rather obliquely rouuded : 

 superior margin well arched, somewhat gibbous behind the 

 middle, inferior almost straight. Seen from above, regularly 

 ovate, with tapering acuminate extremities, widest in the 

 middle ; width considerably less than one half the length. 

 Shell thin, semitransparent, yellowish. Length 3V inch. 



Cytherura quadrata, Norman. PI. I. figs. 10, 11. 



The specimens here noted and figured are interesting as 

 being the only ones on record, with the exception of the ori- 

 ginal types, which were taken in Shetland by Mr. Norman. 

 Though certainly different in proportion of length to height, 

 this species seems to us to come, perhaps, dangerously near to 

 C. striata, from which the shell differs in no other essential 

 respect. 



Paradoxostoma jiexuosum, Brady. PI. I. figs. 8, 9. 



A more extensive series of specimens from various localities; 



