288 STUDIES ON AUSTRALIAN MOLLUSCA, xi., 



Alaba vibex A. Adams. 

 (Plate xviii., fig. 62.). 

 Alaba vibex A. Adams, Ann. Mag. Nat. Hist. (3), x., 1862, p. 

 296; Id., Smith, Proc. Zool. Soc, 1875, p. 538. 



Litiopa vibex Tryon, Man. Conch., x. 1887, p. 282. 

 My figure is drawn from one of two in the British Museum, 

 apparently types, but not so marked, labelled "A. vibex A. Ad., 

 Annals, 1862, x., p. 296. Hab., Sharks Bay, West Australia. Pres. 

 Mrs. de Burgh." 



CALYPTRiEA calyptraeformis Lamarck. 



Trochus calyptraeformis Lamk., Anim. s. vert., vii., pt.i., Aug., 

 1822, p. 12. 



In the Museum at Geneva I saw the type, a single specimen 

 marked in Lamarck's own writing "Trochus calyptraeformis." This 

 tablet has been re-labelled by a later hand, perhaps that of Chenu, 

 "Galerus lamarcki Deshayes." In a recent review of this subgenus, 

 Sigapatella, Dr. E. Larny* also prefers the name of Deshayes. 



It is important for Australian conchologists to decide which name 

 for this common shell is correct. The subject is complicated, in the 

 first instance, Lamarck described a French tertiary fossil as Calyp- 

 trcea trochij 'ormis. f Subsequently he proposed the name Trochus 

 calyptraeformis for a recent shell, collected at Maria Island, Tas- 

 mania, by Peron, which resembled this fossil. Finally he revised 

 the tertiary fossil under the name of Trochus calyptraef ormis. % 



At this time the unfortunate savant had become totally blind, so 

 that this last volume was completed from dictation by his devoted 

 daughter Rosalie. § This sad circumstance probably caused the 

 name of the fossil to be exchanged from Calyptraea trochif ormis to 

 Trochus calyptraeformis by merely accidental inversion. 



The simplest correction of the error seems to be to restore to each, 

 the fossil and the recent, its earlier name. The second part of vqj. 



* Lamy, Bull, du Mus, d'hist. nat., 1911, p.318. 



t Lamarck, Ann. du Mus. i., 1802, p. 385. 



+ Lamarck, Anim. s. vert., vii., pt.2(?date) suppl., p.558. 



§Landrieu, Mem. Soc. Zool. Fiance, xxi., 1909, p.100. 



