124 
MOLLUSCOUS ANIMALS. 
CONCHOLEPAS. 
The foot is truncated, nicked in the middle. The tentacles are short, close together at their base, with 
the eyes on the outer side of their base. The respiratory canal is short. The operculum is horny, and placed 
near the back of the foot. 
The muscles of the foot form a cavity upon which the liver is laid, so that a lamina might be placed 
between the liver and the upper edge of the foot as there is in Crepidula. 
MONOCEROS. 
Monoceros unicorne. 
Bucc. unicorne. Brug. 
Monoceros crassilabrum. Lam. 
Bucc. crassilabrum. Wood. Cat. t. 24. /. 167. — Enc. t. 396./. 2. ( young ). 
Mon. glabratum. Lam. 
Bucc. Narwal. Brug. 
Bucc. dentatum. Wood. Cat. t. 24./. 169. — Enc. t. 396./. 5. 
Purp. Novae Hollandiae. Blain. Mon. t. 12. f. 5. 
Inhab. Pacific Ocean. 
Varies reddish, purple, and yellow. 
Monoceros monodon. 
Bucc. monodon. Gmel. 
Bucc. monoceros. Chemn. x./. 1469. 
Mon. imbricatum. Lam. Var. Mon. breve. Sow. Gen. f. 
Monoceros grande. 
Shell solid, rugose brown, upper whorls with two or three, and last with five or six flat-topped spiral 
ridges. Mouth white ; throat ridged, ridges placed in twos and threes. Length inches. 
Inhab. Pacific Ocean. 
Monoceros punctatum. 
Shell ovate, fusiform, solid, white, upper whorls with one band, last with three articulated lines of 
black and white spots. Throat purplish, outer lip four or five ridged. Length 1£ inches. 
Inhab. Pacific Ocean. 
Monoceros lugubre. Sow. Gen.f. 3. 
Bucc. denticulatum and Bucc. amatum. Wood. Cat. Sup. t. 4. /. 11, 12. 
Mon. cymatum. Sow. T. C. 
Bucc. cymatum. Soland. 
Inhab. Pacific Ocean. 
