OF MOLLUSCA. 141 



The description of the animal by Mr. Fairbank {Ann. Lye. New 

 York, vi. 35) is not correct ; and those given by Quoy and Gaimard 

 (Voy. Astrol. cop. Fig. Moll. t. 38. f. 7, 8) and Kiener (Conch, t. 1, 

 cop. Fig. Moll. t. 107. f. 6) are evidently from some species of 

 Trochus. 



2. Photina. 



Shell smooth, subcorneal ; spire depressed ; axis covered with a 

 smooth callus ; columella ending in a simple point. Operculum 

 horny. Animal ? 



1. P. tseniata, Gray in Wood, Cat. Supp. t. 5. f. 12. 



3. ISANDA. 



Shell orbiculately conical, polished ; whorls rounded ; pillar-edge 

 crenated ; axis umbilicated. Operculum orbicular, of many whorls. 

 Animal ? 



1. I. coronata, Adams, Gen. Moll. t. 46. f. 2. 



4. Camitia. 



Shell orbicular, depressed, polished, imperforated; whorls rounded; 

 pillar-edge callous ; pillar-lip spirally twisted in front. Operculum 

 ? Animal ? 



1. C. pulcherrima, Adams, Gen. Moll. t. 46. f. 8. 



5. Chrysostoma. 



Shell subglobose, solid, polished, very slightly perforated ; whorls 

 few, rounded ; pillar-edge callous. Operculum ? Animal 1 



1. C. paradoxum. 



** Rostrum short, produced, truncated, not retractile. 



Eyes most often free, the fringe generally above the rostrum, and 

 continued to the sides of the foot, fimbriated, furnished with a series 

 of little beards. Tentacles often covered with a series of papillae. 

 Gill-bearing lobe simple. Lingual membrane long, strong, linear, in 

 great measure received into the visceral cavity. Teeth : central series 

 many ; lateral teeth very numerous, hooked, in a series, gradually 

 growing more slender and more simple. 



Trochina, Love'n. 



Fam. III. TURBINID.E. 



Operculum horny, with a solid, external, convex, calcareous coat. 

 Frontal appendages two, between the tentacula, lobed. 



