NODULARIA 949 
CUNEOPSIS TAURIFORMIS Preston. 
“Shell obliquely ovate, truncate anteriorly, wedge-shaped 
posteriorly, solid. periostracum dark, having a silky lustre, ex- 
terior umbonal region with raised zigzag ridges, concentric 
striz below, the umbones turned slightly inwards, decorticated ; 
two cardinal teeth in the left valve, the anterior rather thin, 
the posterior thick with a deep triangular pit between; right 
valve with one thick cardinal tooth situated below the umbo, 
lateral teeth long and roughly striated; nacre silvery; a deep 
pit marks the place of the anterior adductor, the posterior 
scar being only moderately indented. 
Length 31, height 20, diam. 16.5 mm.” (Preston). 
Type locality, Yunnan-fu, Yunnan. 
Unio (Cuneopsis) tauriformis Preston, Ann. Mag. Nat. Hist., 
£7), 2c NV LE, 1906,. p..246, pl. 1x; fig’ 9. 
“T have been unable to find any species closely allied to this, 
which I take to belong to the genus Cuneopsis Simpson.” 
Subfamily HYRIANA® Swainson. 
(ENDOBRANCHL®. ) 
Male and female shells alike, with beak sculpture radial or 
zigzag-radial ; marsupium occupying the inner gills only. 
ROSANORHAMPHUS. 
Beak sculpture zigzag-radial. 
Genus NODULARIA Conrad, 1853. 
Nodularia Conran, Pr. Ac. N. Sci. Phila., 1853, p. 268. 
Pharaonia Bourcuicnat, Mat. Moll. Aceph. Syst. Europ., 
1880, I, p. 3. 
Zairia ROCHEBRUNE, Bull. Soc. Mal. Fr., III, 1886, p. 10. 
Reneus JousSEAUME, Bull. Soc. Zool. Fr., XI, 1886, p. 481. 
Shell elliptical to elongated, pointed behind about midway 
up from the base, the post-basal part produced; beak sculpture 
variable, irregularly zigzag-radial, often breaking into nodules, 
