EEPOET ON THE GASTEROPODA. 593 



Habitat. — From the Hebrides of Scotland (Jeffreys) to the Canaries (McAndrew) and 

 Mediterranean (Monterosato). to 128 fathoms. 



Fossil. — From the Upper Miocene (Seguenza). 



12. Rissoa (Alvania) canariensis, d'Orbigny, and var. of Manzoni. 



Rissoa canariensis, d'Orbigny, Moll. Canaries, Webb and Bertkelot, p. 78, pi. vi. figs. 5-7. 



„ ,, Manzoni, Rissoa Canaries, &c, McAndrew, Journ. de conch., 1868, vol. xvi. 



p. 245, sp. 11. 

 „ „ Watson, Proc. Zool. Soc. Lond., 1873, p. 376, pi. xxxv. fig. 12. 



„ „ Reeve, Conch. Icon., vol. xx. pi. ix. fig. 82. 



„ „ Gwyn Jeffreys, "Lightning" and "Porcupine" Moll., Proc. ZooL Soc. Lond., 



1881, p. 114, sp. 9. 

 Weinkauff, Conch. Cab. (eel Kiister), p. 118, sp. 18, pi. iii. figs. 19, 20. 



February 10, 1873. Tenerife, Canaries. 70 fathoms. 

 Habitat. — Canaries (d'Orbigny) ; Madeira (Watson). 



The variety of this somewhat variable form is that referred to by Manzoni (loc. cit. supra) as 

 resembling Rissoa pxmctura (Montague). It differs from that species in having the sculpture less sharp 

 and somewhat coarser ; the base is more produced ; the whorls are more conical, and less roundedly 

 cylindrical; the suture is less impressed (though the lower part of each whorl is a little more constricted) ; 

 the apex is blunter, being larger and more tabulated ; and the extreme tip is more impressed. 



13. Rissoa [Alvania) hispidula (Monterosato). 



Rissoa clathrata (but not of Grateloup), Philippi, Enumeratio, vol. ii. p. 223, sp. 16b, and p. 303, 



note, pi. xxviii. fig. 20. 

 Alvania clathrata, Weinkauff, Conch. Mittelmeer., vol. ii. p. 302, sp. 2. 

 Rissoa clathrata, Monterosato, Enuruerazione, p. 24. 



„ „ Reeve, Conch. Icon., vol. xx. pi. ix. fig. 76. 



Alvania clathrata, Seguenza, Form. Terz. Calabria, pp. 268, 320. 



Rissoa clathrata, Weinkauff, Conch. Cab. (ed. Kiister), p. 167, sp. 78, pi. xxl figs. 9, 12. 

 Acinus hispidulus, Monterosato, Nomenclatura, p. 63. 



Station 75. July 2, 1873. Lat. 38° 38' N., long. 28° 28' 30" W. Off Fayal, Azores. 

 450 to 500 fathoms. Volcanic mud.j 



Habitat. — Mediterranean (Philippi). 



Fossil. — From the Middle Pliocene onwards (Seguenza). 



I am indebted to Dr Gwyn Jeffreys for the identification of this species, my acquaintance with 

 which is slight. 



Philippi (Joe. cit. supra, p. 303, note) withdraws his name of clathrata as preoccupied, but does 

 not say by Whom. It had been previously used by Grateloup for a Falunien fossil (see Tab. Coq. 

 foss. tert. Dax Landes, Bull. Soc. Linn. Bordeaux, 1827, vol. ii. p. 133, No. 101). The identifica- 

 tion of the species with Rissoa zetlandica (Mont.), is, according to Monterosato, a mistake. 



(ZOOL. CHALL. EXP. — PART XLII. — 1S85.) Tt 75 



