NODULARIA 993 
Unio scobinatus Lea, Pr. Ac. N. Sci. Phila., VIII, 1856, p. 93; 
Ons V1. I8s7.0. 19, plaxeva, dias > JiAc.N. Sei, Philas 
IIT, 1858, p. 299, p!. xxv1, fig. 13.—Sowersy, Conch. Icon., 
XVI, 1868, pl. uxru, fig: 313—Morerer, Ser. Conch., IV, 
1875, p. 354, pl. xvu, figs. 2-6. 
Margaron (Unio) scobinatus Lea, Syn., 1870, p. 32. 
Nedularia scobinata SIMPSON, Syn., 1900, p. 815.—Haas, Con. 
Cab. Unio, 1910; p. 100, pl. x, figs. g-11. 
Unio mandarinus More et, Jl. de Conch., XII, 1863, p. 159. 
Unio pellis-lacerti Morrier, Jl. de Conch., XIII, 1865, p. 22.— 
Sowersy, Conch. Icon., XVI, 1868, pl. Lxxxvi, fig. 457.— 
Moretet, Ser. Conch., IV, 1875, p. 355, pl. xvu, fig. 5. 
Unio venustus Morevrt, Jl. de Conch., XIV, 1866, p. 63. 
Unio oblitus Lea, Syn., 1870, p. 64. 
At first sight this seems to be only a form of Gould’s Unio 
crispata, but a careful examination shows that there appears 
to be differential characters as Dr. Lea has pointed out. It is 
rather more elongated than crispata and has a median radial 
depression not found in that. The nacre is brighter than in 
Gould’s shell and it is less inflated. 
For this species and N. fersculpta Haas, fluctigera Lea, 
phaselus Lea and nucleus Lea, Haas, (Conch. Cab., Unio, 
IQI2, p. 105), has made a new section, Scabies. 
NopULARIA DIESPITER ( Mabille). 
Type locality, Tonkin. 
Unio diespiter Maviiie, Bull. Soc. Mal. Fr., IV, oe p. 162. 
—SIMpson, Syn., 1900, p. 861. 
Oxynaia diespiter Haas, Con. Cab., Unio, 1910, al Va! es 3. 
The description of this species is not now accessible to me. 
Haas, (1. c.), figures it and refers it to his new genus O-rynaia, 
but has not yet described it in his new monograph. 
NopuLARIA GRATIOSA (Philippi). 
Shell small, much compressed, somewhat elongated, appar- 
ently subsolid ; beaks neither full nor high; posterior ridge well 
developed, ending behind in a point on the median line; ante- 
