594 MR. G. F. ANGAS ON THE TERRESTRIAL [DcC. 4, 



An examination of the New-Brighton skeleton as a whole shows, 

 in the first instance, that it closely resembles in all its principal 

 characteristics that described and figured by Dr. Hector in the 

 Transactions of the New-Zealand Institute, with the exception that 

 it has 62 vertebrae instead of 64 as in the Wellington skeleton. It 

 is, however, possible that there may be some mistake in the number 

 of caudal vertebrae of the latter. 



I have looked carefully over the description of the different species 

 of Baleenoptera accessible to me, and find only one, B. sibbaldi, 

 possessing 64 vertebrae, but there are 16 dorsals, or one more than 

 in Dr. Hector's specimen. 



Till a specimen of this New-Zealand species is obtained, of which 

 the external form can be exactly ascertained, I do not wish to pro- 

 nounce a decided opinion as to the specific position of Balanoptera 

 australis. However, judging from the evidence before us, the 

 skeleton under review resembles so closely in all its osteological 

 peculiarities that of B. musculus, that it would be a most remarkable 

 fact if both did not belong to the same species. 



7. On the Terrestrial Mollusca of Dominica^ collected 

 during a recent visit to that Island. By George French 

 Angas, F.L.S., C. M. Z. S. 



[Eeceived November 20, 1883.] 



The island of Dominica, lying almost midway between Martinique 

 and Guadaloupe, in about 1 5° north latitude, is the most lofty of the 

 Lesser Antilles, some of its peaks rising to an altitude of over 5000 

 feet. It is of volcanic formation, and densely wooded, two thirds 

 of the island being still covered by primaeval forest. The rainfall 

 averages over 70 inches in the year. 



I was certainly disappointed in finding the number of genera and 

 species of Land-shells so limited, and the forms so small, as, from 

 the favourable conditions of the island for molluscan life, I should 

 have expected a richer harvest. I give below a list of the species 

 collected by myself during a two months' visit to this beautiful 

 island, being only some 20 in all. 



Inoperculata, 



SuBULiNA (Stenogtra) octona, Chcmu. 



Common in most localities, under stones and decaved leaves. 

 Tliis species appears to have an extended range amongst the West- 

 India islands, reaching to Mexico and Costa Rica. 



ZoNiTES CONCOLOR, Ferussac,= fiT. haudoni. Petit. 



Not common, at an altitude of 2000 ft. 



This species is said to occur also in Porto Rico. 



