602 Proceedings of the Royal Irish Academy. 



Class.— PELECYPODA. 

 Order.— rPtOTOBllAKCHI ATA . 



Family. — Xuculid^. 



Nucida tenuis (Montagu). 



i., ii., . iv., v., . 



i. OS Ballycastle, dead (Chaster, '97a) : near tlie Maidens, deep 

 water, living (Hyndman, '59 ; Belfast Mus., f. Praeger, '89) : 

 coast of Down (Brown, '44). 

 ii, rortmarnock ("W'arren, f. Thomi^son, '56) : Dublin Bay (Jeffreys, 



'63) : Dalkey Sound,-rare (^Yalpole, '53a). 

 iv. "Porcupine" Exp., 1869, 85-110 fms. (Jeffreys, '79): E. I. A. 



Exp., 1886, off Dursey Head, 214 fms., dead^A. Pt. K). 

 V. "Porcupine" Exp., 1869, Galway Bay, 15-20 fms., and 165-208 

 fms. (Jeffreys, '79). 

 Distrilution, — Arctic seas in both hemispheres to Mediterranean 

 and New England. "W. America. N. E. Asia. 



Nucida corhidoides, Seguenza. 

 . . . iv., . . 

 iv. "Porcupine" Exp., 1869, 90-364 fms. (Jeffreys, '79): "Plying 

 Pox" Exp., 1889, 1000 fms. (Smith, '89). 

 Distribution. — Xorth Atlantic. Mediterranean. ^". Africa. Deep 

 water. 



\^]\'^ucula cancelhda, Jeffreys.] 



• . . . iv., v., . 



iv. " Plying Pox" Exp., 1889, 1000 fms. (Smith, '89). 

 V. "Porcupine" Exp., 1869, 816 fms. (Jeffreys, '79). 



Distribution. — Both sides of Xortli Atlantic. Deep water. 



I^ucula sidcata, Brown. 

 . ii., iii., iv., v., . 



ii. Dublin Bay (Clark and "Warren, f. Thompson, '56; Branscombc 

 and W^arren, f. Jeffreys, '63) : off Dublin coast (Parran f. 

 Thompson, '47a ; AValpole, '53a). 



iii. Kymph Bank, 50-60 fms., very young specimens (M'Andrew, f. 

 'Thompson, '56): 11. I. A. Exp., 1885, 1886, off S. coast of 

 Cork, 54-55^ fms. (Chaster, '98, A. Ii. K). 



