198 PKOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



in the British Museum, from Santa Cruz, Canaries, on a tablet labelled 

 ^'PurpuraT\ at the back of which Jeffreys had written in pencil "Not 

 Purpura"" } 



Adaiison's " Le Sadot " is P. lapillus. He not only figures the 

 species himself, but makes reference to figures of Lister's " Euccinum 

 Anglicum". " J'ai observe," he continues, " ce coquillage dans le 

 portde rOrient, a I'lle de Tenerif des Canaries, a celle de Fayal, Tune 

 cies Asores; et je sqai qu'elle se trouve frequemment sur toutes les 

 cotes de la Bretagiie." It is curious that he never definitely states 

 that he has seen specimens from Senegal. But there can be no 

 reasonable doubt tbat he was mistaken in regarding it as an 

 inhabitant of that coast, or of the Canaries or Azores. 



Mr. Tomlin has kindly given me two specimens of P. lapillus ex 

 Coll. "Watson, taken at Grand Canary. I have seldom seen shells 

 more beach-worn. They must be considered as 'ballast' specimens. 

 No writer for 150 years has recorded the species as living in the 

 Atlantic islands. 



I owe to Mr. Tomlin three other specimens, also ex Coll. Watson, 

 from Madeira, no doubt the actual specimens to which Watson (122) 

 refers when he places P. lapillus in a list of species " dredged by me 

 or brought to me as Madeiran, but which I reject ". 



On the strengtli of two specimens of unknown locality from the 

 Cape, Krauss (62) allowed himself to include P. lapillus in his list of 

 South African marine Mollusca. Gr. B. Sowerby (112) has "received 

 no confirmation of its living there ". 



M. Sars(106), G. 0. Sars (105), and Pfeff'er (98) give Behring's 

 Sea as a locality for P. lapillus, but not on the authority of their own 

 collecting. Crosse (19), cataloguing (after Dall 20) the Mollusca of 

 Behring's Strait and the neighbouring parts of the Arctic Ocean, 

 records no other Purpura but canaliculata, Duel., from Plover Bay, 

 Norton Sound, and the Aleutian Islands. Krause (60), whose 

 collecting was chiefly done on the Tschuktschen Peninsula, in the far 

 north of the Gulf of Anadyr, found no Purpura in Behring's Sea. 

 In the Pribiloff and Commander Islands, Behring's Sea, Dall (23) 

 found only P. lima, Mart., a form with which canaliculata, Duel., is 

 identical. 



Middendorff, both in his Beitriige and Reise (82, 83), gives 

 P. lapillus from the Sea of Ochotsk, and mentions the islands of 

 Sitcha and XJrup (in the Kuriles) as further localities. He says that 

 in the Sea of Ochotsk it is rare, the majority of examples being rather 

 thin, and he describes a form intermediate between lapillus and 

 freycinetii, Desh. 



^ Search among Lowe's Mogador shells in the Natural History Museum 

 failed to reveal his specimens of ' P. lapillus'. But Mr. Tomlin has 

 placed in my hands a box labelled in R. B. Watson's hand '' Pisania, 

 Mogador". It contains numerous eii.-M\\])\es oi Ocinebrina imrpuroidea, 

 Pallary. When one knows that many, if not most, of Lowe's marine 

 shells passed into Watson's possession, it appears extremely probable that 

 we have here the actual specimens which Lowe took at Mogador, and 

 mistook for a " dwarf state of P. lapillus ". 



