424 Journal of the Asiatic Society of Bengal. [N.S., XIX, 
Yunnan-fu. Neumayr,! in his account of the scientific results 
of Count Bela Szechen yi's expedition, described two new species, 
Unio superstes and U. heres, from the Lake Tali and Unio 
pantoensis from Panto, Yunnan. Another new species was des- 
cribed later by Fulton* under the name Cuneopsis ‘auriformis. 
The various forms were included by Simpson” in his Descriptive 
Catalogue, and have recently been revised in a special contri- 
bution by Haas.* J one not ren’ a ial to go into the 
question in any detail, and only include a short note on the 
single valve brought ae by the Fees y Sladen Expedition. 
Genus Rhombuniopsis Haas. 
1920. Rhombuntopsis, Haas, op. cit., p. 149. 
Haas has recently created this genus for the two Yunnanese 
Unionids, tauriformis and superstes. The genus is closely allied 
to the European Rhombunio, but stands in an isolated position 
when compared with the other genera of Asiatic Unionidae. 
Rhombuniopsis superstes (Neumavyr.) 
(Plate 16, Figs. 8, 8a.) 
1898. Unio superstes and U. heres, Neumayr, Wiss. Ergeb. Reise Bela 
zechenyt Ostasien, II, pp. 648, 644, Plate I, Figs. 3, 
1914. Unio superstes and U. her res, Simpson, Descr. Cat. Naiades, pp. 722, 
1920. Rhombuniopsis superstes, Haas, Senckenbergiana, II, p. 147. 
J agree with Haas in considering the two species of Neumayr 
as being the same, and have, therefore, adopted his name. 
The only (single right) valve collected by the Percy Sena 
I:xpedition from the north-western shores of the Lake Tali, 1 
intermediate in shape between the two “ species’ ’ figured e 
vr. 
Genus Corbicula Meg. 
Specimens of five species of this genus were collected by 
Dr.Gregory. None of these are new, but the interest of the col- 
lection lies in the fact that most of these had not been collected 
since they were first described. I have also added a few notes 
on C, yunnanensis Nevill—the only other Yunnanese species, 
which is not represented in the present collection. 

a Tes mayr, Wise, Brg Reise Bela Sz ie een. i pp. 643, 644 
(1898). See also Haas, Abhand. Senck. Nat. Gesell., XX XVIII, pp. sat 
186, 190 (1924) ; according to him U. pantoensis Neumayr isa Nodulari 
? Fulton, Ann. Sigin 3 Nat. Hist. 7) XVU, p. 246, Plate = Fig. 9 
a Sinpon, J A Descriptive Catalogue of the Naiades, Detroit, Michigan 
* Haas, Senckenbergiana, II, pp. 146-151 (1920). 
