103 Mr. R. M*^ Andrew on the Mollusca observed during a 



and those dredged, I got ninety- eight species ; of which fifty-four 

 are common to the British seas, ninety are known to inhabit the 

 Mediterranean, one [Psammobia rugosa) the south coast of Por- 

 tugal, one (a Kellia or Galeomma, but genus not ascertained) the 

 coasts of Algarve and Asturias, one {Marginalia glabella) Senegal 

 and the Canaries, five (two small Marginella, a Chiton, a Buc- 

 cinum, and Mitra zebrina) I met with in the Canaries, and one (a 

 Turbo) is new to me. 



Laminarice are as abundantly developed in Mogador harbour 

 as on our own coasts, the prevailing species apparently identical 

 with the common tangle, but of a paler colour ; numerous speci- 

 mens of Patella pellucida are found upon it. 



Two days' sail from Mogador brought us to Lancerote, one of 

 the Canaries. Among these islands we spent exactly a month, 

 which allowed time for only a partial examination of a small 

 portion of the coasts of Lancerote, Grand Canary and Tenerifie, 

 and I appropriated a full fortnight to the latter island. I have 

 reason to think that Fuerteventura, and the smaller islands of 

 Graciosa, Alegranza, and Monte Claro, which I. did not visit, 

 would have furnished results of greater interest. 



The marine Mollusca described in the costly work of Webb 

 and Berthelot on the Natural History of the Canaries, comprise 

 138 species, of which eight are Cuttle-fishes, and six naked Mol- 

 lusca, leaving 124 species of marine shells, of which a list was 

 furnished to me by my friend Prof. Edw. Forbes. Of these I did 

 not succeed in taking 



Argonauta Argo. Scissurella Berthelotii. 



Planaxis laevigata. Mytilus elongatus. 



Conus betulinus, Prometheus and Area Nose. 



guinaicus. Cardium costulatum. 



Cymba Neptuni, porcina«nd pro- Cardita corbis. 



boscidalis. Crassatella divaricata. 



Marginalia lineata. Lutraria rugosa. 



Cassis flammea and testiculus. Mitra ebenea. 



Cerithium nodulosum. Trochus, two or three species 

 Murex trunculus. doubtful. 



But as several of these are known African shells, and were re- 

 ceived from fishermen, it is possible that some may have been' 

 obtained from the coast of Africa, the great Canarian fishing-'i 

 ground. ''J 



Of six species of Hyalsea I only procured three. >' 



Of five species of Cleodora I only procured three. 



Of two species of Atalanta I only procured one. 



Several of the species I have obtained are either new or not 

 identified ; but when they are all worked out and named, I reckon 

 that my list of shells of the Canaries will include about 260 to 



