1870.] MR. H. ADAMS ON NEW SHELLS. 5 
** Mr. Gurney observes that the specimens now exhibited ‘ appear 
to be male and female of the true A. nevioides, identical with those 
found in Africa. I have never seen this larger race from India pre- 
viously, or, at least, have never recognized it if I have seen it. 
“© «The occurrence of these two birds in India raises a curious 
question of nomenclature. 4. nevioides is undoubtedly far more 
“ fulvescens”’ in its average plumage than the allied smaller Indian 
race, which you and I have been in the habit of identifying with 
Aquila fulvescens of Gray. 
« « But as it now seems that the true A. nevioides occurs in India, 
is it not most probable that A. fulvescens, Gray, is in reality a 
synonym of A. nevioides, and that the smaller allied but less 
fulvescent bird, which is peculiar to India, should be termed Aquila 
vindhiana of Franklin, without the synonym of 4. fulvescens?’ 
*T also exhibit a singular specimen, received from Mr. Brooks at 
the same time, which Mr. Gurney considers to be a female of 4. 
vindhiana of an unusually dark colour, attributable to the plumage 
being newly acquired atter a recent moult. This bird has been 
considered by Mr. A. Hume to be 4. nevia, and by others A. 
hastata.” 
The following papers were read :— 
1. Descriptions of a New Genus, and of Eighteen New 
Species of Mollusks. By Henry Apams, F.L.S. 
(Plate I.) 
Genus Nesta, H. Ad. 
Testa oblongo-ovali, superne convewa, apice terminali, subincurvo, 
extus decussata, sulco dorsali in fissuram desinente; apertura 
margine crenulato. 
Nesta canpipa, H. Ad. (Plate Pidies lp :l a) 
N. testa oblongo-ovali, tenui, lirulis elevatis tenuissimis concentricis 
et radiantibus concinne decussata, nivea; sulco dorsali lateribus 
distinctis, transverse striato, fissura antica valida ; apertura mar- 
gine postico paulum incrassato, omnino delicate crenulata. 
Long. 53, lat. 3, alt. 12 mill. 
Hab. Rea Sea (Coll. M‘Andrew). 
This pretty and delicate little form appears to be allied to Zeidora, 
A. Ad.; but the peculiar internal septum, which is a marked cha- 
racteristic of that genus, is absent in Nesta. It may be considered 
a communicating link between Zetdora and Emarginula. 
The genus Zeidora was obtained by my brother in Japan, where 
also he met with another singular shell, Morchia obvoluta, of which 
two specimens have been dredged by Mr. M‘Andrew in the Red 
Sea. 
