Mollusca of 8t. Andrews. 421 



Genus 3. Tectura, Cuvier. 

 Tectura testudtnali's, Miiller. Oj). cit. iii. p. 246, v. pi. 58. f. 3. 

 Common under stones near low-water mark. 



Tectura virginea^ Miiller. Op. cit. iii. p. 248, v. pi. 58. f. 4. 



Under stones near low-water mark ; nearly as common as 

 the foregoing. 



Tectura fulva, Miiller. Op. cit. iii. p. 250, v. pi. 58. f. 5. 

 A single specimen on the West Sands after a storm. 



Fam. 2. FissurellidsB, Fleming. 



Genus 2. Emarginula, Lamarck. 



Emargimda Jissura^ L. Op. cit. iii. p. 259, v. pi. 59. f. 2. 



Not uncommon in deep water ; and worn specimens amongst 

 the shell-debris on sands. 



Fam. 3. Capulidse, Fleming. 



Genus Capulus, De Montfort. 



Capulus ungaricus, L. Op), cit. iii. p. 269, v. pi. 59. f. 6. 



Frequent in deep water, and often brought in by the fishing- 

 boats. 



Fam. 7. Trochida, D'Orbigny. 



Genus 2. Trochus, Rondeletius. 



Trochus tumidus, Mont. Op. cit. iii. p. 307, v. pi. 62. f. 2. 



Common on hard ground in the bay, in the stomach of the 

 cod and haddock, and on the West Sands after storms. 



Trochus cinerariusj L. Op. cit. iii. p. 309, v. pi. 62. f. 3. 

 In great abundance on stones and rocks between and beyond 

 tide-marks. 



Trochus zizyphinus, L. Op. cit. iii. p. 330, v. pi. 63. f. 6. 

 Not uncommon in deep water and on the beach after storms ; 

 rarely met with at extreme low water at the East Rocks. 

 Var. Lyonsii is occasionally seen. 



