76 MARINE FAUNA OF ST. ANDREWS. 



Genus 2. Helcion, De Montfort. 

 Helcton jjellucidum, L. Op. cit. iii. p. 242, v. pi. 58. f. 1 & 2. 

 Abundant on the blades of the tangles ; while var. IfBvis 

 occurs in hollows at the bases of the stems. 



Genus 3. Tectura, Cuvier. 

 Tectura testudinalis, Miiller. Op. cit. iii. p. 246, v. pi. 58. f. 3. 

 Common imder 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. Fissurellidae, Fleming. 

 Genus 2. Emarginula, Lamarck. 

 Emarginula 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. Capulidae, Fleming. 

 Genus Capulus, De Montfort. 

 Capultis 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. Trochidae, D'Orbigny. 

 Genus 2. TroCHUS, Rondeletius. 

 Trochus ttiniidus, Mont. Oj). 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. 



