REPORT ON THE GASTEROPODA. 135 



Ianthina rotundata, Kiister, Concli. Cab. (ed. Kiister), p. 4, pi. i. figs. 1, 2. 

 n „ Monterosato, Enumerazione, p. 35. 



„ communis, Sowerby, Thes. Conch., pt. 38, p. 50, sp. 3, pi. ccccxliii. (i. Gen.) figs. 7, 8. 



June 20, 1873. Lat. 35° 35' N., long. 50° 27' W. Surface. 



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

 1 000 fathoms. Pteropod ooze. 



Station 133. October 11, 1873. Lat. 35° 41' S., long. 20° 55' W. Mid-Atlantic. 

 1900 fathoms. Globigerina ooze. 



Habitat. — Great Britain, France (Jeffreys), Azores (Drouet), Madeira (my dredgings), 

 Canaries (M'Andrews), Mediterranean (Monterosato). 



I avoid other quotations of interest, such as Lischke (Conch. Japan, vol. iii. p. 52, Ianthina frag His, 

 Lam.), and Krauss (Siidafr. Moll., p. 92, Ianthina communis), the citation of which would involve a 

 discussion of the synonymy and species of this genus, on which I am not called upon to enter. 



Family Solariid.£, Chenu, 1859. 



This family was first differentiated by Gray (see Mrs Gray's figures, vol. iv. pt. 2 ; Dr Gray's 

 Systematic Arrangement, 1850, p. 79, fam. .13) under the name Architectomidcc. The Messrs 

 Adams (Genera, vol. i. p. 241) correct this word to Architcctonicida;, without reference to Gray. 

 Chenu in 1859 set aside Gray's name in favour of Solariidoz (see Manuel, vol. iii. p. 232), but without 

 assigning any reason for the change. Deshayes in 1864 (Animaux sans vertebres du bassin de 

 Paris, vol. ii. p. 65), without mention of Chenu, substituted Solariadm for Gray's name, supporting 

 the change by reasons which, though a little overjDressed, are unanswerable. It is somewhat singular 

 that Keferstein in 1866 (see Bronn's Thier-Reich, vol. iii. ; Weichthiere, p. 1052), and Weinkauff in 

 1868 (Moll, des Mittelmeeres, vol. ii. p. 260), both seem either to have been unaware of the author 

 of the name of the family or to have claimed it as their own. 



Genera. 1. Solarium, Lamarck. 2. Eifrontia, Deshayes. 3. Trachysma, G. O. Sars. 



1. Solarium, Lamarck, 1799. 

 Species. 



l.^Solarium (Architectonica) perspcctivum, Linne. 2. Solarium (Architectonica) reevei, Hanley. 



3. Solarium (Torinia) rosulentum, Wats. 



1. Solarium {Architectonica) perspectivum (Linne). 



Trochus perspective, Linne, Syst. Nat., 10th ed., p. 757, and 12th ed. p. 1227, No. 581, in part. 



Chemnitz, Conch. Cab., vol. v. p. 121, pi. elxxii. fig. 1693 (figs. 1691, 1692, 

 1694-96, exclusis) [vol. xi. p. 162, pi. cxcvi. figs. 1884-85, represents 

 Solarium maximum, Phil., f. Hanley.] 

 Solarium formosum, Hinds, Proc. Zool. Soc. Lond., 1844, p. 22, sp. 1. 

 ,, zonatum, Philippi, Zeitschr. f. Malak., 1848, p. 173, sp. 54. 

 auslrale, Philippi, Zeitschr. f. Malak., 1848, p. 168, No. 44. 



