Mazycx: Mouwuusca or SoutH CAROLINA 23 
343. ochraceus Say (crocatus Lea). Cooper River, 
Ravenel collection. 
344. ———— ogeecheensis Lea.* Coll. Bryant Walker, De- 
troit, Mich. 
345. var. prevostianus Lea.* Coll. Bryant 
Walker, Detroit, Mich. 
346. — paulus Lea.* Edisto River, coll. Bryant Wal- 
ker, Detroit, Mich. 
347. ——-— pullus Con.* ‘‘Sawney’s Creek’’ [near Camden] 
(Jay ’50, p. 64). 
348. radiatus Gmel.* (Ravenel 34, p. 6.) 
349. sudus Lea* (concavus Lea). ‘‘ Abbeville County” 
(Lea ’53, p. 260). 
350. taeniatus Con.* (Gibbes 48.) 
351. tenerus Rav. MS. Santee Canal, St. John’s, 
Berkeley, Ravenel collection. This shell was first mentioned by 
Dr. Ravenel in the catalog of recent shells in his cabinet, in 1834, 
but no description was ever published by him. The recent dis- 
covery of two specimens in the Ravenel collection now owned 
by the Charleston Museum with the names written in the shells 
in Dr. Ravenel’s handwriting seems to solve all doubt concerning 
the species and set at rest the guess work of students of the North 
American Naiades. The shell is very close to Lampsilis ogee- 
cheensis Conrad (prevostianus Lea), and is about midway 
between that species and L. modioliformis Lea, and may best be 
considered a variety of the former. The shell is thin, smooth, 
rather inflated, very inequilateral, with small rounded beaks; 
epidermis yellowish brown, rayed with green; shorter, broader 
and more ventricose than typical modioliformis in same collec- 
tion. 
352. vanuxemensis Lea.* Edisto River, coll. Bryant 
Walker, Detroit, Mich. 
353. vaughanianus Lea.* “Sawney’s Creek near 
Camden” (Lea ’39, p. 5). 
354. Medionidus subtentus Say.* (Say ’31, pl. XV.) 
355. Anodonta cataracta Say.* (Gibbes ’48; Ravenel ’74, 
p. 58.) 
