On the Terrestrial Mollusca of Dominica. 429 
Elaps jiliformis (Gthr.). 
An adult example from Bogota differs from tlie typical spe- 
cimen in having two postoculars. Ventral shields 295. 
Atractaspis rostrata, Pl. XIX. figs. I. 
Head broad, depressed ; snout slightly turned upwards, the 
rostral shield being provided with a sharp anterior edge, and 
extending backwards for some distance between the anterior 
frontals; two pairs of frontals. Vertical extremely broad; 
one pre- and one postocular; five upper labial shields, the 
third and fourth entering the orbit; temporals 1+1, the ante- 
rior descending between the fourth and fifth labials: a very 
long lower labial shield corresponds to the third, fourth, and 
fifth upper labials. Scales in twenty-three rows. Body elon- 
gate. ee 227-244; subcaudals simple, 22 or 23. 
Two specimens, 22 inches long, were sent by Dr. Kirk from 
Zanzibar. ‘This is the fifth species of this genus in the Col- 
lection of the British Museum. 
XLIX.—On the Terrestrial Mollusca of Dominica and Gre- 
nada; with an Account of some new Species from Trinidad. 
By R. J. LecHMERE Guppy, F.L.S., F.G.S., &e, 
Part I. DOMINICA. 
Dominica is, I believe, the only island in the Antilles of 
which no list of terrestrial Mollusea has yet been published, 
In Mr. Bland’s Catalogue, in the ‘Annals of the New York 
Lyceum,’ still the most complete list we possess of the land- 
shells of the West Indies, it is stated that no species from 
Dominica were known to the author. ‘T’o remedy this defect, 
I took advantage of a vacation to visit and explore that island, 
which I found to consist chiefly of mountains composed of 
voleanie rocks, and ranging from 2000 to 5000 feet high. 
This is perhaps the highest land in the chain of the West- 
Indian Islands between Jamaica and South America, 
There is but little which may be properly called lowlands 
in Dominica; but on the lower slopes near the sea I found a 
few Mollusca, chiefly Bulimulus exilis, Stenogyra octona, 
Succinea approximans, and Helicina humilis. Ascending 
higher, we find Helix dentiens, H. badia, H. Josephine, H. 
nigrescens, Amphibulima patula, Bulimulus laticinctus, and 
Helicina epistilia. Excepting the last one, these species are 
found everywhere above 300 or 400 feet of elevation. The 
dense and excessively humid forests which cover all the higher 
