152 Contributions to Indian Malacology. [No.-2, 
Vondenbuschiana, and also in both Adams’s figures of different species 
oi Monocondylea from 8. America. The same ocenrs in Anodon and 
im the type species of Margaritana of Schumacher,* (7. margaritifera, 
L.). I have not had an opportunity of examining the animals of the 
Burmese species of Monocondylea, and therefore cannot say ii the 
gills are free or not. 
Besides the above forms, a minute species of Anodon is stated by 
Mr. Benson to inhabit ponds in Bundelcund, J. A. S. B., V. 750. 
P.S. No. 2a.—Unto spurtus, Gm. Tranquebar. 
Mya spuria, Gm, vol. I, Pt. VI, p. 3222, No. 16. 
Unio spuria, Lam. V1,.80, No. 45. 
Mya spuria, Wood, Ind. Test. p. 12, pl. 2, No. 35. 
Since writing the note on this species at p. 146, I have found that it 
was described originally as from India. Gmelin refers to Schroeter 
Hinl. in Conch. I, 617, No. 9, pl. 7, f. 5, so perhaps the name may 
haye been given by Schroeter, though that by no means follows from 
the reference. The description is very brief: “ MZ. testa rhombea viridt, 
natibus glabris” and the shell is said to be like corrugatus, but near- 
ly twice the size and pertectly smooth in front of the beaks (‘“ praeter 
vulveé regionem tota glabra,” Gm. 1. c.). Wood’s figures are all poor. 
The shell can scarcely be a young form I think, if considerably larger 
than corrugatus. 
Mya radiata,t I find, is attributed to Malabar by Gmelin, (p. 3220,) 
from whom Wood appears to have only copied his localities. The species 
is, I think, correctly attributed to Chemnitz by Mr. Benson, although 
other authors give Gmelin as their authority. Gmelin’s description 
runs thus—“ MW, testa equivalvi pellucida tenuissime transversim stri- 
ata viridi flavicante livido radiata ; valvis altero latere latissimis, altero 
angustissiumis.” J know of no form of Indian Unio to which this de- 
seription would be applicable, and I cannot help suspecting that the 
writers who have applied the name to an American species may very 
possibly be right. Wood’s figure, also, does not recall any Indian 
* It is by no means clear that Margaritona and Monocondylea are more than 
subgenera, or even artificial sections of Anodonta. M. Vondenbuschiana is inter- 
mediate between the second and last in characters of the shell, and there is no 
known essential distinction in the animal. 
+ The Linnzan genus Mya, like most Linnean genera, was an artificial group 
to some extent Besides Mya as now understood, it comprised Unio and seve- 
ral other genera. 
