PATAGOlSriAN EEGION. 115 



"Snails are few and small, and only seen after the dews. At 

 Valparaiso rain is abundant during the three winter months, 

 and the southern coasts are luxuriantly wooded, and extremely 

 wet. The characteristic pulmonifera are the fresh-water 

 Chilinias. The genus Buchanania is doubtful. There are 

 31 species of Bulimus (including B. Chilensis, Plectostylus) and 

 22 of Helix; Succinea Chiloensis, A.ncylus Oayanus (Yalparaiso), 

 Planorbis fuscus, Paludestrina sp. Unio Chilensis, Fisidium 

 Chilense (Yaldivia). Helix Binneyana is found on the island of 

 Chiloe. 



The Island of Juan Fernandez (36) has at least 20 species of 

 land shells, all peculiar to it : — 



Helix quadrata. Omalonyx Gaj'ana. Tomatellina mirnita. 



arctispira. Achatina diaphana. „ trochiformis. 



pusio, „ splendida. Succinea Cumingi. 



tessellata. „ buliiQoides. „ mamillata. 



ceroides. „ conifera. „ fragilia, 



marmorella. „ acuminata ? Pannacella Cumingi. 



helicophantoides. Spiraxis consimilis. 



In the adjoining island, Masafuera, are found — 



Tomatellina Recluzii. Succinea semiglobosa. 



Succinea rubicunda. „ pinguis. 



27. Patagoniait Eegion. 



The Pampas, or great plains of Patagonia, are dry and rain- 

 less nearly all the year; the vegetation which springs up 

 during the light summer rains becomes converted into natural 

 hay for the support of the wild animals. In Fuegia the mean 

 temperature is 33° — 50°, and there is rain and snow through- 

 out the year ; yet the bases of the mountains are clothed with 

 forests of evergreen beech.* Bulimus sporadicus is found on the 

 banks of the Eiver Negro, and B. lutescens at the Straits of 

 Magellan ; Helix lyrata (costellata, D'Orbigny ?) and H. saxa- 

 tilis inhabit Fuegia. Succinea magellanica is also found at the 

 8traits, and Chilinia fluminea, Limncea viatrix, a Faludestrina, 

 Anodon jpuelclianus, and TJnio Fatagonicus in the Eiver Negro. 

 Feronia marginata and Fotamides ccelatus were discovered in 

 Fuegia by Mr. Couthouy. 



The Falkland Islands are 300 miles east of Patagonia, and the 

 only recorded shells are two species of Faludestrina. There is 



* Humming-birds are seen fluttering about delicate flowers, and parrots feeding 

 amidst the ever-green woods. (Darwin, p. 251.) 



