298 
spira conica, submucronata ; anfract. 3 cum apice punctiformi, 
superis conveais, ultimo 2 longitudinis formante, basi parum atte- 
nuato ; columella angulatim a ventre anfractus penultimi rece- 
dente, substricta ; apertura obliqua, angulato-ovali ; perist. sim- 
plice, margine dextro regulariter arcuatoa. 
Long. 73, lat. 4, alt. 33 mill. 
Hab. Ceylon (Layard). 
55. Succinea Bacont, Pfr. S. testa semiovato-acuminata, tenuis- 
sima, longitudinaliter subundulato-plicata, pellucida, nitida, pallide 
cornea; spira parvula, submucronata ; anfract. 2 cum apiculo 
punctiformi, penultimo convexo, ultimo = longitudinis formante, 
basi subattenuato ; columella filosa, superne subplicata ; apertura 
obliqua, subregulariter acuminato-ovali, non incumbente ; perist. 
simplice, margine dextro antrorsum arcuato. 
Long. 15, lat. 10, alt. 6 mill. 
Hab. Calcutta (Bacon). 
56. Succinea viTREA, Pfr. 8S. testa ovato-conica, tenuiuscula, 
confertim plicato-striata, nitida, albo-hyalina ; spira conica, sub- 
papillata; anfract. 3 convexis, ultimo 2 longitudinis formante, 
inflato, basi attenuato ; columella filosa, arcuata ; apertura parum 
obliqua, incumbente, ovali, superne vix angulata ; perist. simplice, 
marginibus callo opaco junctis, subsymmetricis. 
Long. 12, lat. 8, alt. 5 mill. 
Hab. Calcutta (Bacon). 
57. Succinea DAvuCINA, Pfr.  S. testa ovato-conica, solidula, 
leviter striatula, oleoso-micante, lutescenti-rubella ; spira conica, 
apice subpapillata ; anfract. 3, penultimo convexo, ultimo 2 longi- 
tudinis formante, bast parum attenuato ; columella filari, leviter 
arcuata ; apertura obliqua, incumbente, acuminato-ovali, basi lata ; 
perist. simplice, marginibus subsymmetricis. 
Long. 92, lat. 6, alt. 43 mill. 
Hab. Caleutta (Bacon). 
2. Descriptions oF THREE New SPECIES oF Pyrtuia. 
By Dr. L. Preirrer. 
1, Pyrura Maceinurvrayi, Pfr. P. testa subperforata, ellip- 
tico-acuminata, tenuiuscula, sublevigata, nigra ; spira elongata, 
concaviusculo-conica, acuta; varicibus albis, castaneo submacu- 
latis ; anfract. 9 planis, ad suturam arcuato-striatis, antice valde 
descendentibus, ultimo spira vix longiore, basi attenuato; aper- 
tura subverticali, angustissima ; dentibus parietalibus 2, superiore 
parvo, trigono, altero compresso, intrante, simplice ; plica co- 
lumellari tenui, compressa, arcuatim ascendente ; perist. acuto, 
margine dextro superne recto. infra medium eaxpansiusculo, intus 
