82 



MANUAL OF THE MOLLUSCA. 



Trochita radians. 

 Crepidula dilatata. 

 Fissurella, many sp, 

 Liotia Cobijensis. 

 Gadinia Peruviana. 

 Littorina Pernvia«a. 

 „ araucaaa. 

 Rissoina Inca. 

 Cancellaria buccinoides. 

 Sigaretus cymba. 

 Fusus Fontainei. 

 Murex horridus. 

 Ranella ventrioosa. 

 Triton scaber. 

 Nassa dentifera. 

 Columbella sordida. 



Oliva Peruviana. 

 Kapana labiosa. 

 Mouocei-os gifianteus. 



„ crassilabris. 



„ acumiiiatus. 



Puqjura chocolata. 

 Coiicliolepas. 

 Mitra maura. 



Terebratella Fontainei. 

 „ Chilensis. 



Discina lamellosa. 

 „ Isevis. 



Pholas subtruncata, &c. 

 Lyonfcia cuneata. 



Solen gladiolus. 

 Solecurtus Dombe)'i. 

 Mactra Byroneiiai-;. 

 Mesodesma Chilensis. 

 Cumingia lan:iellosa. 

 Semele rosea, &c. 

 Petricola, many sp. 

 Saxidomus opacua, &c. 

 Cyclina Kroyeri. 

 "Venus thaca. 

 Crassatella gibbosa. 

 Nucula, many sp. 

 Leda, many sp. 

 Solenella Norrisii. 

 Lithodomus Peruvianas. 

 Saxicava solida. 



XY. Magellanic Province. 



This region includes tlie coasts of Tierra del Euego, the Falk- 

 land Islands (Malvinas), and the mainland of South America, 

 from P. Melo, on the east coast, to Concepcion, on the west. It 

 is described by M. D'Orbigny and Mr. Darwin (Journal, p. 177 

 et seq.). Philippi also has given attention to it; he assigns 88 

 species to the district near the Straits of Magellan. Only 15 

 species are known from the Malvinas, and 11 of these have not 

 been met with elsewhere. The southern and western coasts are 

 amongst the wildest and stormiest in the world; glaciers in 

 many places descend into the sea, and the passage round Cape 

 Horn has often to be made amidst icebergs floating from the 

 south polar continent. The greatest tides in the straits amount 

 to 50 feet. " In T. del Fuego the giant sea-weed [Macrocystis 

 ipyrifera) grows on every rock from low-water mark to 45 

 fathoms, both on the outer coast and within the channels ; it 

 not only reaches up to the surface, but spreads over many 

 fathoms and shelters multitudes of marine animals, including 

 beautiful compound Ascidians, various patelliform shells, Trochi, 

 naked mollusca, cuttle-fish, and attached bivalves. The rocks, 

 at low water, also abound with shell-fish which are very dif- 

 ferent in their character from those of corresponding northern 

 latitudes, and even when the genera are identical the species are 

 of much larger size and more vigorous growth."* 



Shells of the Magellanic Province (* Falkland Islands). 



Buccinum antarcticum. Monoceros imbrioatus. Ti-oplion Magellanicus. 



„ Donovani? „ glabratiis. Voluta Magellanica. 



BuUia cochlidium. „ calcar. „ ancilla. 



* Shell-fisli are here the chief support of the natives as well as of the wild animals. 

 At Low's harbour a sea-otter was killed in the act of carrying to its hoi" a large 

 Volute, and in T. del Fuego one was seen eating a cuiilc-fish.— Darwin. 



