522 EEV. E. E. WATSON ON WEBB'S 



" 19. Littorina vulgaris (Turho littoreus, Linn.)." 

 D'Orbigny has published this as a new species, L. canariensis ; 

 but it is the L. striata. King, which name has the priority. 

 It is also found in Madeira. 



" 20. Turbo rugostis, Linn. & Lamk." 



D'Orbigny gives this species, which is also Madeiran. 



" 21. Natica porcellana, nob. N. mamillce and N. effusce 

 afSnis. Found also in Madeira. I want it of all things with the 

 operculum. As many more as you can spare." 



M. d'Orbigny spells this name with one I. In the text it 

 bears no name ; but on the plate it has that of " d'Orb." 



" 22. Oerithmm lineolatum, nob. Adans. t. 10. f. 5, ' le De- 

 gon,' not taken up by Lamk. More." 



M. d'Orbigny refers to a small var. of C. vulgatitm, Brug., 

 which is, no doubt, this species. It is not found in Madeira, but, 

 like the Nassa above mentioned, seems to abound in the Sel- 

 vagens. 



" 31. vulgatum, Lamk., Adans. t. 10. f. 3. ' Le Goumier,' 



p. 156. ' J'ai trouve cette espece dans les endroits vasevix de 

 I'isle Tenerif et de celle de Fayal.' " 



It is thus given by D'Orbigny. 



It is not found in Madeira. 



" 23. Succinumscrobicidator, nob.; Triton scrohiculator,lj'dmk.; 

 Murex scrohiculator, L." 



This is 'Ranella scrohiculator. It is given by D'Orb., and is 

 found in Madeira. 



" 24. Mitra melaniana, Lam. Much higher-coloured than in 

 Madeira." 



D'Orbigny publishes this as M. nigra, Chem. It is the M. lu- 

 tescens, Lam., of the Mediterranean, and the Mitra fusca, Eeeve. It 

 is found at Madeira, as Mr. Lowe mentions ; but the difference 

 of colour he adverts to is not found in the better specimens. 



"25. Voluta porcina,'La.mk.'''' 



D'Orbigny has published this species under this name ; but, 

 according to Lowe, in his very able paper on Oynibium, given in 

 his notes to his Mogador shells, this is an erroneous identifica- 

 tion, and the species here in question is really Gynibiwn (Voluia) 

 rubiginosum, Swains. Further, Mr. Lowe rejects this altogether 

 as a Canarian shell, founding his decision, not merely on circum- 



