248 Mr. L. Reeve on the Geographical Distribution of the Bulimi. 



form and simply dark-banded, belong to a type quite peculiar to 

 tbis locality, extending in B. Californicus to the opposite penin- 

 sula. At Vera Cruz, on the eastern side of Mexico, a Bolivian 

 type appears in B. Lattrei, Jonasi andfenestratus. A very remai'k- 

 able type is presented in the Mexican B. Dombeyamis, which is 

 at present unique. B. lahiatus and Schiedianus, which are almost 

 coloui'less, partake of the typical character of B. confinis and li- 

 quabilis inhabiting Texas, and B. dealbattcs inhabiting Alabama, 

 which is the northern limit of the genus in the new world. 



6. Islands of the Western Hemisphere. 



The terrestrial conchology of the islands of the western hemi- 

 sphere is for the most part typically distinct from that of the con- 

 tinent, and the more so in each particular group of islands in 

 proportion to their distance from the main land. This receding 

 gradation of types is distinctly shown in the Bulimi of the Great 

 and Little Antilles. In the first group of islands this genus has 

 but a meagre share in the conchology, which comprises more of 

 Cyclostomata. In the latter group the Bulimi, passing south- 

 ward, are gradually larger and more painted, and exhibit a rela- 

 tionship with those of the neighbouring continent. Jamaica, 

 Cuba, and Tortola yield a few species of the Cyclostoma type, B. 

 Gossei, turricula, &c., just spoken of as appearing at Honduras in 

 B. Kieneri; but there are more of the ground-burrowing Glandina 

 type, such as B. subula, octonoides, Goodhalli, and pauperculus in- 

 habiting the savannahs. B. immaculatus is a rather large species, 

 and B. mirabilis, remarkable for its squamate growth, is quite 

 unique as a type. In Guadaloupe and Martinique, connecting 

 the Leeward and Windward of the West India Islands, a few spe- 

 cies occur with shells of darker and more solid growth, as B. Gua- 

 daloupensis, Martinicensis and chrysalis. In the principal islands 

 of the Little Antilles approximating to the South American con- 

 tinent, the Bulimi increase in size and colouring, gliding most 

 distinctly into the types of the Venezuelan province. The richly 

 painted B. fulminans and Blainvilleanus of Merida are represented 

 in the island of St. Vincent by B. auris-Sileni; the delicate B. 

 roseatus and xanthostoma of Bogota by B. stramineus and Vincen- 

 tinus in the same island ; and B. glaber, a robust species of Tri- 

 nidad, is represented in the nearest main land of Venezuela by 

 B. distortus and euryomphalus, and in New Granada by B.perdix. 



The Gelepagos Islands contribute about ten species of Bulimus, 

 small in size and of a dusky hue, agreeing in this respect with 

 what has been observed by Mr. Darwin in reference to the dusky 

 colour of the birds and insects. B. eschai-iferus and rugulosus 

 from Chatham Island, B. ustulatus, nux, and wiifasciatus from 

 Charles Island, B. Jacobi and rugiferus from Jacob Island, B. 



