50 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Jan. 20, 



C. cancellata, De Blainville, Faune Fran9. p. 142, pi. 4 B. f. 1 ; 

 Hid. Mol. mar. de Esp. lam. ii. f. 3, 4 (opt.). 



'Porcupine' Exp. 1870: Atl. St. C. Sagres (fr.); Med. 50, 

 Benzert lioad, Rasel Amoush. 



Distribution. G. Gascony (De fo/m), Atlantic coasts of Spain 

 and Western Africa, Mediterranean and Adriatic ; 4-100 fms. 



Fossil. Miocene: Vienna and Bordeaux Basins, Northern and 

 Centra] Italy. Pliocene : Denmark (Morch), Biot, Italy, Algeria, 

 and C. Yerd I. {Rochebrnne). 



C. similis of Sowerby is scarcely a variety. 



The apex of the shell is trochiform and different from that of 

 other species ; it resembles in shape and sculpture the apex of 

 Columhella haliceeti. 



Family XXVII. Aporrhaidje. 



1. Aporrhais pes-pelecani, Linne. 



Stromhvs pes-pelecani, L. S. N. p. 1207. 



A. pes-pelecani, B. C. iv. p. 250, pi. iv. f . 3 ; v. p. 216, pi. Ixxx. 

 f. 1. 



' Lightning ' Exj). St. 5. 



'Porcupine' Exp. 1869: 2, 13-15, 18, 35, the Minch, off 

 Lerwick. 1870: Atl. 2, 10, 11, C. Sagres ; Med. C. de Gata, 55, 

 G. Bona, Benzert Koad, G. Tunis. Specimens from Cape Sagres 

 and the last three stations belong to a variety which I would name 

 carinata. They are keeled in the middle of each whorl, the ribs 

 are nodose, and the spire tapers to a fine point. This variety may 

 be meridionalis of Basterot. 



Distribution. Throughout the North Atlantic from Iceland and 

 Fiuniark to the Mediterranean, Adriatic, and jEgean ; 6-100 fms. 



Fossil. Every Miocene, Pliocene, and Post-tertiary or Quaternary 

 bed in Europe, as well as the last in Rhodes and Cos, from the sea- 

 level to 1360 feet above it. Var. carinata. Coralline Crag (S. Wood, 

 as probably A. serresianus). 



2. Aporrhais serresianus, Michaud. 



Bostellaria serresiana, Mich, in Bull. Soc. Linn. Bord. 1828, 

 p. 120, f. 3, 4. 



Chenopus serresianus, Phihppi, Moll. Sic. ii. p. 185, t. xxvii. f. 8 



Var. A. macandrece, B. C. iv. p. 253 ; v. p. 216, pi. Ixxx. f. 2. 



' Porcupine' Exp. 1869 : St. 1, 3, 5, 6, 10, 17, 18, 23a, A5a,Abb, 

 64, 65, 68, 70, Little Minch, off Lerwick. 1870 : Atl. 3, 3a, 6, 

 8-14, C. Sagres, 26-28ff ; Med. 50ff, off Jijeh and Riualdo's 

 Chair, Adventure Bank. Variable as to the number and ])osition of 

 the spikes. One monstrous specimen has a spur which projects 

 from behind the lower part of the pillar, besides a double spike at 

 the base. Another specimen is somewhat scalariform. The variety 

 macandrece is smaller and more slender ; it occurs with the typical 

 form in the Mediterranean. 



