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



that he identified the Tadin with the West Indian species, his description is utterly inapplicable to 

 this of Gmelin. He says that the last whorl " est relevee de quinze canelures," and his figure 

 evidently multiplies these still more, whereas Gmelin's species has nothing like that number of ridges 

 and furrows. The other authorities I have quoted as I find them, not being in circumstances 

 adequately to control them. Sowerby, Thes. Conch., pts. 39 and 40, p. 109, sp. 27, pi. ccccLxvii. 

 (v. Gen) figs. 86-89, certainly presents the African species. 



Family Ianthinid^e, D'Orbigny, 1839. 



Genus lanthina, Lamarck, 1792. 



Species. 

 1. lanthina exigua, Lamarck. 2. lanthina rotundata, Leach. 



1. lanthina exigua, Lamarck. 



lanthina exigua, Lamarck, Anim. s. vert., vol. vi. pt. 2, p. 206 (ed. Desk), vol. ix. p. 5, No. 2. 

 Janthina ,, Deskayes, Encyclop. method., vers., text, vol. ii. p. 325, sp. 2 ; and plates, vol. iii. 



pi. cccclvi. fig. 2. 

 lanthina „ Sowerby, Genera, vol. ii. pi. cxci. f. 2. 



„ „ D'Orbigny, Amerique nierid., vol. v. p. 414, No. 318. 



„ D'Orbigny, Cuba, voL ii. p. 84, No. 260. 



„ „ Conch. Cab. (ed. Kiister), p. 7, pi. ii. figs. 6, 7. 



„ „ Reeve, Conch. Icon., vol. xi. pi. v. fig. 21. 



,, „ Monterosato, Enumerazione, p. 35. 



,, „ Hutton, Manual New Zealand Moll., p. 71. 



,, „ Sowerby, Thes. Conch., pt. 38, p. 51, pi. ccccxliv. (ii. Gen.) figs. 23, 24. 



Station 70. June 26, 1873. Lat. 38° 25' N., long. 35° 50' W. West of Azores. 

 1675 fathoms. Globigerina ooze. 



Station 73. June 30, 1873. Lat. 38° 30' N, long. 31° 14' W. West of Azores. 

 1000 fathoms. Pteropod ooze. 



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

 450 fathoms. Volcanic mud. 



Station 78. July 10, 1873. Lat. 37° 26' N, long. 25° 13' W. San Miguel, Azores. 

 1000 fathoms. Volcanic mud. 



Station 120. September 9, 1873. Lat. 8° 37' S., long. 34° 28' W. Off Pernambuco. 

 675 fathoms. Eed mud. 



Habitat. — North and South Atlantic. Mediterranean to New Zealand. 



2. lanthina rotundata, Leach. 



lanthina rotundata, Leach (MS.), in Dillwyn's Contrib. to Hist. Swansea, 1840, p. 59. 



„ communis, Forbes and Hanley, Brit. Moll., vol. ii. p. 549, pi. Ixix. figs. 6, 7, and pi. cxxxiii. 



fig. 1. 

 „ rotundata, J. Gwyn Jeffreys, Brit. Conch., voL iv. p. 186, frontispiece, and pi. iii. fig. 1, and 

 vol. v. pi. lxxvii. fig. 1. 



