36 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Jail. 20, 



17. Natica flammulata, Requien. 



N.flammulata, Req. Cat. Coq. Corse (1848), p. 61. 



N. safjraiana, Hidalgo, Mol. mar. de Esp. lam. -6 a. f. 5-7 

 (opt.). 



'Porcupine' Exp. 1870: Atl. St. off C. Sagres, Tangier B. ; 

 Med. Cartagena B., 50, 50 «, Benzert Road, Rasel .^moush, Adven- 

 ture Bank. 



Distribution. Grulf of Gascony, Cadiz, throughout the Mediter- 

 ranean, Cuba, Madeira and Canaries ; 20-120 fms. 



Fossil. Pliocene : Calabria and Sicily. 



N. filosa, Philippi (1852), but not of Reeve, N. sagraiana, 

 d'Orbigny (1854), and perhaps Nacca fulminea of Risso, but not 

 Nerita fulminea of Gmelin. 



The specific name ought strictly to he Jlammula or fiammeol a, in- 

 stead oi flawmulata, vFhich is not a Latin word. 



18. Natica marmorata, H. Adams. 



N. marmorata, H. Adams, in Proc. Zool. Soc. 1869, p. 274, 

 pi. xix. f. 8. 



N prietoi, Hidalgo, Mol. mar. de Esp. lam. 20 b. f. 2, 3 (opt.). 



' Porcupine ' Exp. 1870 : Med. St. Cartagena B. 



Distribution. Algiers (TFezH^flf/jf), Minorca ( FTidafgo), Palermo 

 (Monterosato), Adventure Bank (' Shearwater ' Exp.) ; 16-120 fms. 

 Canary 1. (Mc Andrew) ; 30-120 fns. 



Not Nacca marmorata of Risso, which appears, from the descrip- 

 tion, to be Natica imbricata. 



The sculj)ture of the Mediterranean shell is somewhat different 

 from that in Mr. Adams's description. Instead of being very 

 finely and obliquely striated (or whatever may be meant by " stri- 

 atula "), the surface is microscopically but irregularly reticulated. 

 It differs from N. flammulata in the peculiar colouring of the shell, 

 and the shape of the umbilical callus. The operculum is calcareous 

 in a specimen which was kindly given me by my late friend Mr. 

 McAndrew. I have already, in my work on British Conchology, 

 endeavoured to give tliis excellent naturalist ample but fully-de- 

 served credit for his long and persistent labours in exploring so many 

 parts of the North Atlantic for the furtherance of our common 

 science ; and I would avail myself of the present opportunity to 

 renew my grateful testimony. But the field of submarine researches 

 has been, since his death, so greatly extended with respect to depth, 

 that the result of his numerous dredgings in comparatively shallow 

 water, although they were most u-eful, will become of less importance 

 in considering the diflScult problem of geographical distribution. 

 See, for instance, the important paper of Dr. Fischer in the ' Comptes 

 Rendus' for 1883, on some of the results of the last French Ex- 

 pedition, and the valuable communications of Professor Yerrill to 

 the Academy of Sciences at Cincinnati on the progress of the con- 

 tinued operations of the United States for similar objects. 



This is N. prietoi of Hidaljr;o, ex typo. 



