592 THE VOYAGE OF H.M.S. CHALLENGER. 



B. Eeticulated (Alvania), i.e., ribs and spirals pretty equal in strength. 



10. Rissoa (Alvania) calathus (?), Forbes and Hanley. 



Rissoa calatlius, Forbes and Hanley, Brit. Moll., vol. iii. p. 82, pi. lxxviii. fig. 3. 



„ „ Gwyn Jeffreys, Brit. Conch., vol. iv. p. 11, vol. v. p. 207, pi. lxvi. fig. 4. 



Alvania calatlius, Weinkauff, Concli. Mittelmeer., vol. ii. p. 304, sp. 5. 



„ „ Hidalgo, Moll. Mar. Espagne, Journ. de conch., 1867, vol. xv. p. 391, '^sp. 14. 



Rissoa calatlius, Reeve, Conch. Icon* vol. xx. pi. v. fig. 39. 

 Alvania calatlius, Seguenza, Formaz. Terz. Calabria, p. 268. 

 Rissoa calatlius, Jeffreys, "Lightning" and "Porcupine" Moll., Proc. Zool. Soc. Lond., 1884, p. lll,sp. 2. 



„ „ Weinkauff, Conch. Cab. (ed. Kiister), p. 170, sp. 83, pi. xxii. fig. 2. 



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

 450 fathoms. Volcanic mud. 



Habitat. — From the Hebrides of Scotland to the" Canaries and the Mediterranean 

 (Jeffreys). 



Fossil. — In the Middle Pliocene (Seguenza). 



The various identifications of the foreign specimens of this shell seem to need careful revision. 

 The solitary Challenger specimen of the species is in such bad condition that the identification of it 

 has been very difficult, and in the end, not altogether without doubt. 



11. Rissoa (Alvania) cancellata (Da Costa). 



Turbo cancettatus, Da Costa, Brit. Conch., 1778, p. 104, pi. viii. figs. 6-9." 



„ cimex (not of Linne), Wood, Ind. Test., p. 150, pi. xxx. fig. 15. 

 Rissoa crenulata, Michaud, Rissoa, 1832, p. 15, sp. 10, single pi., figs. 1, 2. 



,, „ Potiez and Michaud, Moll. Douai, voL i. p. 268, sp. 10. 



,, „ Lamarck, Anim. s. vert. (ed. Desh.), vol. viii. p. 465, sp, 2. 



,, „ Philippi, Enumeratio, vol. ii. p. 126, sp. 13, p. 131, sp. 8. 



,, „ Forbes and Hanley, Brit. Moll., vol. iii. p. 80, pi. lxxix. figs. 1, 2. 



,, „ McAndrew, Distrib. Moll. N. Atlantic, Brit. Assoc. Report, 1851, p. 31. 



„ cancellata, J. Gwyn Jeffreys, Brit. Conch., vol iv. p. 8, vol. v. pi. lxvi. fig. 3. 

 Alvania crenulata, Weinkauff, Conch. Mittelmeer., vol. ii. p. 301. 

 Rissoa crenulata, Aradas e Benoit, Conch. Mar. Sicil., p. 197, No. 523. 



„ cancellata, Monterosato, Notiz. Conch, foss. Monte Pellegrino, &c, p. 29. 



„ ,, Watson, Proc. Zool. Soc. Lond., 1873, p. 367, pi. xxxiv. fig. 2. 



„ „ Reeve, Conch Icon., voL xx. pi. iv. fig. 32. 



,, ,, Monterosato, Enumerazione, p. 24. 



Seguenza, Formaz. Terz. Calabria, pp. 116, 268, 320. 



„ „ Jeffreys, "Lightning" and "Porcupine" Moll., Proc. Zool. Soc, Lond., 1884, 



p. Ill, sp. 1. 



„ (Alvania) crenulata, Weinkauff, Conch. Cab. (ed. Kiister), p. 115, sp. 14, pL iii. figs. 9-12, 

 pi. xix. figs. 6, 7. 

 Acinopsis cancellata, Monterosato, Nomenclatura, p. 63. 



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

 450 to 500 fathoms. Volcanic mud. 



