372 WATSON : MARINE MOLLUSCA OF MADEIRA. 



tion one is marked as coming from Canary. Neither Mr. Lowe 

 nor myself met with it, but Senhor Nobre mentions it in his 

 list, but with no further information of any sort, so that on the 

 whole the species can hardly be reckoned as a well-established 

 Madeiran species. 



Finally, lanthina pallida 'frequent.' Of this species none 

 have been met with by any other collector and no Madeiran 

 specimens of it exist at Cambridge, but in the British Museum 

 there are several marked as from Madeira, and of course a 

 chance aggregation of these sea rovers might be hit upon at 

 any time. 



Allowing, then, these last two to pass, Mr, McAndrew's 

 Madeiran list will thus stand at, let us say, 115 species. The 

 only other list which has been published is, as I have already 

 mentioned, one by Senhor Nobre, of Oporto, from specimens 

 collected by Senhor Ernesto Schmitz, teacher of Natural 

 History in the Lyceum of Funchal. The total number of 

 species enumerated by him is 93 in all, from which one falls 

 to be deducted, viz., Litoriiia canariensis d'Orb., which is not 

 even a variety, but only the young form of Litorina striata 

 King. This species in its earliest stage always presents the 

 tubercles and the relative difference of shape, which from 

 hundreds of specimens one can trace in every shade of transition 

 into the larger, smoother, more globose, and altogether more 

 common-place form of full growth described by King. 



Senhor Nobre's list then presents 92 species, of which 59 

 are the same as those of McAndrew, while 33 are additions to 

 his list, and these require a little examination ; the more so 

 that outside of the mere list of names the information supplied 

 by Senr. Nobre is meagre in the extreme. A very few times a 

 synonym is supplied, but in nearly every case ' Funchal,' 

 ' Dredged in Funchal Bay,' or ' Dredged at Canigal ' is the only 

 entry. Beyond the bare mention of such facts a good deal is 

 needed in order to its being possible for a reader to judge how 

 far a species may really be accepted as indigenous. For all 



J.C, vi., July, 1891, 



