short visit to the Canary and Madeira Islands, <SfC. 101 



were afterwards, by a continuance of bad weather, detained in 

 port till the end of the month. In addition to the species of land 

 shells previously met with by me in the neighbourhood of Lisbon, 

 such as Helix porentina, H. barbula, &c., I obtained a Pupa the 

 size of P. secalina, and a Testacellus. The weather only once 

 permitted of my attempting to dredge, when I tried in deep 

 water towards the south side of the Tagus, but got very little of 

 anything. Nassa scalariformis was the only addition to my pre- 

 vious list from the locality. Cymha Olla is sold in the market 

 of Lisbon, and doubtless eaten by the natives. We set sail from 

 Lisbon on the 1st of April, and almost immediately after passing 

 the bar, began to observe numerous marine animals, such as 

 Vellella, Salpa (in chains), Portuguese men-of-war, &c. In 

 lat. 34°, and about fifty or sixty miles from the nearest land, a 

 Loligo was brought on board by the patent log: — a similar cir- 

 cumstance occurred on another occasion further north, and at a 

 still greater distance from land. 



5th April. — Dredged two hauls at eight miles from the shore, 

 oflp Mogador, depth 35 to 40 fathoms, bottom fine sand and 

 mud. 



Obtained twenty-two species of shells, all known inhabitants 

 of the British seas, with the exception of the six following, viz. 

 a Tellina, Venus undescribcd, but previously dredged by me in 

 Gibraltar Bay, Dentalium dentalis, Buccinum modestum, Ringui- 

 cula auriculata, and a Natica, species not ascertained. One of 

 the species ( Venus striatula) would hardly have been looked for 

 so far south. 



We spent two days in the port of Mogador, during which a 

 strong wind with a heavy surf coming into the harbour rendered 

 landing inconvenient, and dredging all but impracticable; I 

 managed however to work a little under the lee of the island 

 which forms the harbour, by going very early each morning be- 

 fore the breeze freshened up. I had no opportunity of examining 

 the shore of the main land — indeed only landed there once, but 

 the country in the vicinity of the town was far from inviting — 

 presenting nothing but bare sand, rising behind into hills topped 

 Avith a shrubby vegetation. The island, on the contrary, at the 

 time of our visit was covered with a perfect carpet of flowers. 

 The only land shells I could find there were — 



Helix lactea. Buliinus decoUatus. 



aspersa. acutus. 



pisana (the most abundant). pyramidatus. 



A CaracoUa (white with pink in- 

 side) . 



Of marine shells, between what were collected on the shore 



