662 ON CRUSTACEA BROUGHT BY DR WILLEY FROM THE SOUTH SEAS. 



The branchial laminae are very large. 



The caudal laminae (or furca) have six pairs of serrate ungues or principal 

 spines, the first pair of the graduated series one-fourth as long as the last. They 

 have above them three spinules and a row of setules. 



Length, 8 mm,, breadth, 6'4 mm. Other specimens 7'5 x 5 mm., and 5 x 3"-5 mm. 



Habitat. Blanche Bay, at 60 fathoms and at 70 fathoms ; the larger specimens 

 from the smaller depth. 



The species is strongly distinguished by the character of the maxillipeds combined 

 with its great size. The name is chosen in compliment to Dr Arthur Willey. 



Faji. Ctpridinidae. 



18.50. Cypridinadae, Baird, British Entomostraca, Ray Soc, p. 176. 



1880. Gypridinidae (part), Brady, Challenger Reports, vol. 1, Ostracoda, p. 151. 



1887. Cypridinidae (part), Sars, Arch. Naturv., vol. 12, p. 181. 



1894. Gypridinidae (part), G. W. Miiller, F. u. Fl. des Golfes von Neapel, Mon. 21, 

 p. 203. 



1896. Cypridinidae, Brady and Norman, Trans. Royal Dublin Soc., Ser. 2, vol. .5, 

 p. 638. 



Distinguished from the Asteropidae by the structure of the maxillae and the absence 

 of branchiae, or their comparatively inconsiderable development. Eumonopia, Glaus, is 

 distinguished as a subgenus of Cypridina, among other characters, by having a T-shaped 

 branchial vesicle, and Cypridina. Hilgendorjii, G. W. Mtiller, has seven branchial folds 

 in the male (G. W. Miiller, loc. cit., p. 20-5). 



Gen. Cypeidixa, Milne-Edwards. 



1838. Cypridina, Milne-Edwards, Annotated Edition of Lamarck's Anim. sans 



Vertebres, vol. 5, p. 178. 



1840. Cypridina, Milne-Edwards, Hist. Nat. Crust., vol. 3, p. 409. 



1850. Cypridina, Baird, Brit. Entom., Ray Soc, p. 176. 



18.53. Cypridina, Dana, U.S. Expl. Exp., vol. 13, pt. 2, p. 1290. 



1876. Cypridina, Claus, Unters. genealogischen Grundlage der Crustaceen-systems, 

 'p. 92. 



1880. Cyp-idina, Brady, Challenger Reports, vol. 1, Ostracoda, p. 155. 



1887. Cypridina, Sars, Arch. Naturv., vol. 12, jx 206. 



1890. Cypridina (and subgen.- Pyrocypris), G. W. Mtiller, Zool. Jahrbiicher, vol. 5, 

 p. 211. 



1894 Cypridina, G. W. Mtiller, F. u. Fl. des Golfes von Neapel, Mon. 21, p. 204. 



1896. Cypridina, Brady and Norman, Trans. Royal Dublin Soc, Ser. 2, vol. 5, 

 p. 645. 



Many moi-e references may be obtained by consulting those given above. In citing 

 Cypridina from the edition of Lamarck's History of Invertebrates, annotated by Henri 

 Milne-Edwards, Brady and Norman add in parenthesis "(including subgenus Pyrocypris, 



