RECENT BRITISH OSTRACODA. 



387 



Of this pretty little species I have seen only three specimens — two found amongst 

 shell-sand from Connemara by Dr. Alcock, the other dredged off the Hebrides by Mr, 

 Jeffreys. The Irish specimens were completely bleached, but that from the Minch was 

 well coloured. My drawings were taken from the former, and exhibit the lucid spots 

 very distinctly. These are not visible in the fresh specimen. Prom the colour and 

 o-eneral characters of the shell, I have no hesitation in assigning it a place under the 

 genus Fontocypris. It seems to be quite distinct from any hitherto described species. 



Cape Verdr 



P 



from the side 



3. Poktocypbis trigoxella, G. 0. Sars. (Plate XXV. figs. 31-34, and Plate XXXVIII 



fig. 3.) 



Pontocypris trigonella, Sars, Oversigt af Norges marine Ostracoder, p. 16. 



British type. Distribution : Recent— Norway, Great Britain, Ireland, 

 Fossil— Raised beaches and glacial clays, Scotland and Ireland. 



Shell less compressed than in either of the foregoing species 

 triangular, rather higher in front than hehind ; greatest height nearly in the middle 

 and equal to half the length. Anterior extremity rounded, posterior obtusely pointed 

 Dorsal margin strongly arched, ventral gently sinuated in front, and sweeping up wa r 

 with a slisht convexity behind. Seen from above, elongate oval, widest a little in front 

 of the middle ; width equal to more than one-third of the length j acutely pointed m front, 

 obtusely behind. End view broadly oval. Shell very slightly pilose, dull white in 

 colour/clouded with opaque patches. The terminal claw of the first pair of feet rather 

 more than equalling in length the three preceding joints. Second joint of the last pair of 

 feet more than equal in length to the following two joints ; pectinated spine short. Post- 

 abdominal rami obliquely truncate at the apex ; terminal claws nearly equal; inn, 

 marginal set* slendei-, and longer than the claws Second jaws of *££*£ 

 subchelate, alike on both sides, terminal claw of moderate length CopuW™ ^gM 

 subhamate. - Eye large and distinct, composed of three lenses, two lateral and 



anterior." 

 Length A- in., height -^ in. . 



° d8 ' ° .„.., » /-.i_.j_ /Mi. r> R nhoH snn\ • in shell 



Hab. In 3-30 fathoms. Plymouth {Mi 

 from Guernsey and Birterbuy Ba 

 (G. 8. B.) ; in tidal pools, Arran 

 Davison) . 



one 



tifully 



Stranraer 



M. Norman), Estuary of Thames {M\ 



a ./ • a «iw ^rirunrished from others of the genus by its shape and 



A pretty species, and easily distinguisneu u** 



colour 



* Pontocypris (?) amkn. n. sp. (Plate XXXIV. figs. 43, 44) 



™™™tp highest in the middle ; greatest 

 Carapace, as seen from the ^f^ZlT^fro^, posterior narrowed 



height much less than half the length. Anterwr "J* ^ ^^ sloping steeply 



and obliquely rounded ; superior margin aicuaa, , . d Q tlin as seen 

 behind ; inferior sinuated in front of the middle, straxght 



3g2 



» 



