MARINE MOLLUSCA OF MADEIRA. 269 



dredging during " a few days spent intiie Madeira islands ; " the 

 other, published in 1889, that of Prof. Nobre, enumerating the 

 species collected by Mr. Ernesto Schmitz of the Seminario de 

 Funchal. 



McAndrew individualizes 156 (I follow his reckoning) species, 

 but 29 are unnamed, and of the remaining 127, three {Dentalium 

 dentalisi Marginella guanclia, and Neritina viridis) have crept in 

 by mistake, and with almost equal certainty the same may be 

 said of four others (viz. Poromya granulata, Pectunculus siculus, 

 Murex cristatus, and Amphisphyra hyalina). Besides these, four 

 were wrongly identified, viz. Bulla ampulla, Chiton fascicularis , 

 Pecten maximus, and JP. opercularis ; finally, Rissoa purpurea, 

 probably a slip for R. violacea. Thus 12 more have to be 

 deducted, leaving 115. 



The other list, " Contribucioes para a Fauna Malacologica de 

 Madeira," was published in the ' Instituto,' no. 3, 1889 (Porto), 

 by Senhor Augusto iSTobre. It contains the names, but barely 

 more, of 93 species : one of these, Litorina canariensis, d'Orb,, 

 is merely the young form of i. striata, which also occurs in the 

 list ; another, Troclius conuloides, is a re-duplication of T. zizy- 

 phinus. Five more, viz. Mytilus edulis, Tellina serrata, Natica 

 flammulata, N.Alderi, N. Josephina, " dredged at Funchal," require 

 confirmation. Marginella Pliilippi calls for further examination. 

 Eight, therefore, of Nobre's 93 species must for the present be, 

 I think, excluded*. Of the 85 which remain, 59 were already 

 given by McAndrew, so that 26 — not an inconsiderable addition 

 — swell McAndrew's list of 1 15 to a total of 141 known species 

 in all. To these I now add 35 new species and 206 previously 

 determined species — that is, 241 ; bringing up the entire number 

 of observed Mollusca from the Madeiran sea to 382. 



This result has come about through a combination of circum- 

 stances not very usual. During ten years' residence in Madeira 

 I had opportunity to collect and dredge. In 1874 the collections 

 of the Eev. E. T. Lowe, continued from 1827 to 1872, were 

 sent to me by his literary executor, my lamented friend Mr. T. 

 Y. Wollaaton. In 1896 Mr. J. Tate Johnson (instead of him- 

 self publishing, as I had long hoped he would do) seut to me his 



* Fuller criticism of this List will be found in the Presidential Address to 

 the Oonchological Society, 1890, I. c. supra. Six more of the species giyen in 

 the List should, I fear, have been excluded : see, at the end here, a strange 

 list of dredging products. 



