Undata. | Shell with 30 grooves: lip tooothed, the inner-one wrinkle 
ki and tuberculate. 
Lister tab. $96. fig. 7. Gualt. test. tab. 66. P. 
Bonan recr. and Muf. kirch. 3. fig. 215. 
Cherin, conch. 5. tab. 190. fig. 1950, 1951. 
Inhabits the Zzdzam jeas. — Sbe]l folid whitifh cinereous or reddifh 
with black or cinereous {pots and irterrupted broad bands: 
crown pointed and a little prominent : 7Zs about 30, flattened, 
the intermediate grooves fmooth : pi//ar white. 
554 WORMS. TESTACEA. 82. Nerita. 
Exuvia. Shell grooved: lips toothed: the inner-one tuberculate. 
Lister tab. 596. fig. 5. tab. $99. Pet. Gaz, t. 100. f. 6. 
Bonan recr, and Muf. kirch, 3. fig. 220? 
Gualt. teft. tab. 66. CC. Seba Muf. 3. t. 59. f. 4, 6. 10. 
Argenv. conch, tab. 7-1? Knorr Vergn. 3. t. Y. f. 5. 
Chemn. conch. 5. tab. 191, fig. 1972, 1973- 
Inhabits India. Shell dilated folid large, white with black or 
blueifh fpots: rijs 15—19, broad flattened: aperture wide : 
pillar Bat. 
Maxima, Shell folid thick glabrous, with undulate black and yellowifh 
rays: outer-lip toothlefs, inner-one a little concave 
and 4-toothed. 
Inhabits Chemn. conch, 5. tab. 190, fig. 1942, 1945. 
Shell very large, within and at the aperture fnowy : éaner-lip 
fmooth and very broad, 
dextilis, — Shell with angular black lines, and 16 crenate ribs and 
grooves: outer-lip crenate without and toothed within; 
inner-lip wrinkled above and tuberculate beneath ; 
palate toothed. 
Inhabits Rumpf. Muf. tab. 22. fig. 3. very rare. 
Chemn. conch. $4 t. 390. f. 1944. 1945. 
Jírai4. Shell deep black glabrous and very thinly ftriate above: 
both lips white, the outer-one very-finely grooved and 
flightly toothed within, the inner-one concave wrinkled 
and tuberculate. 
Chemn, conch. 5. tab. 190. fig. 1954, 1955. 
Inhabits the Atlantic American and South yeas. 
Afeen{onis. Shell with 16 white grooves, the ribs {potted with white: 
crown a little prominent: outer-lip glabrous each 
fide, inner-one a little concave yellowifh and toothed. 
Chema. conch. 5. tab. 191. fig. 1956, 1957. 
Inhabits Ajcenfion l/land; rather large: crowm generally worn 
down, rarely black : J/4 thin pellucid, 
Lineat as 
