290 Proceedings of the Royal Physical Society. 



99. Cytherura simplex, Brady and Norman. 



1889. Cytherura simplex, B. and N., I.e., Pt. I. p. 200, pi. xviii. 

 figs. 1, 2. 



Hah. — Off St Monans, frequent, in 12 to 15 fathoms, 

 bottom partly clean sand and partly gravel. 



100. Cytherura similis, G. O. Sars. 



1865. Cytherura similis, G. O. Sars, Oversigt af Norges marine 

 Ostracoder, p. 72. 



Hab. — Dredged off Musselburgh and in Largo Bay; not 

 very common. 



101. Cytherura clathrata, G. O. Sars. 



1865. Cytherura clathrata, G. O. Sars, I. c, p. 77. 



Hab. — Bo'ness, Firth of Forth (Brady and Robertson). 

 Dredged off Bo'ness, off the west side of Inchkeith, and other 

 parts of the Forth ; not common. 



102. Cytherura cellulosa, A. M. Norman. 



1865. Cytherura cellulosa, Norman, Nat. Hist. Trans. Northumb. 

 and Durh., vol. i. p. 22, pi. v. figs. 17-20; pi. vi. fig. 17. 



Hab. — South Bay, and in other parts of the estuary, but 

 apparently not common ; but as it only measures T T o of an 

 inch (about *36 mm.) it may have frequently been overlooked. 



Genus (30) Cytheropteron, G. O, Sars, 1865. 



103. Cytheropteron latissimum (Norman). 



1865. Cythere latissima, Norman, I. c, vol. i. p. 19, pi. vi. figs. 5-8. 



Hab. — Dredged in South Bay, and in deep water west of 

 May Island ; frequent. 



104. Cytheropteron nodosum, G. S. Brady. 



1868. Cytheropteron nodosum, Brady, Mon. rec. Brit. Ostrac, p. 448, 

 pi. xxxiv. figs. 31-34. 



Hab. — Firth of Forth (Brady and Eobertson). South Bay, 

 off Musselburgh ; not unfrequent. 



