Mollusca of St. Andrews. 423 



Rissoa soluta, Philippi. Oj). cit. iv. p. 45, v. pi. 68. f. 7. 

 Occasionally in deep water and in shell-sand. 



Rissoa semistriata^ Mont. Oj). cit. iv. p. 46, v. pi. 68. f. 8. 

 From deep water and in shell-sand ; not common. 



Genus 4. Hydeobia, Hartmann. 

 Hydrohia ulvce. Pennant. Op. cit. iv. p. 52, v. pi. 69. f. 1. 



In great abundance in the brackish pools near the mouth of 

 the river Eden. 



Fam. 11. Skeneidae, Clark. 

 Genus 1. Skenea, Fleming. 

 Skenea planorhisj Fab. Ojp. cit. iv. p. 65, v. pi. 70. f. 1. 

 Common in rock-pools amongst Ceramium and other algaj. 



Genus 2. Homalogyra, Jeffreys. 



Homalogyra rota, Forbes & Hanley. Oj). cit. iv. p. 71, 

 V. pi. 70. f. 3. 



In shell-debris from the West Sands. Dead. 



Fam. 13. Turritellidae, Clark. 



Genus TuRRiTELLA, Lamarck. 



Turritella terebra, L. Oj?. cit. iv. p. 80, v. pi. 70. f. 6. 



Common in deep water. Var. nivea is also not rare. A 

 favourite food of the codfish, probably in many cases on 

 account of its tenant the hermit crab. 



Fam. 15. Scalariidse, Broderip. 



Genus Scalaria, Lamk. 



Scalar ia Trevelyana, Leach. Op. cit. iv. p. 93, v. pi. 71. f. 4. 



From the fishing-boats, and on the West Sands after storms. 

 Rather rare. 



Fam. 16. Pyramidellidae, Gray. 



Genus 2. Odostomia, Fleming. 

 Odostomia rissotdes, Hanley. Op. cit. iv. p. 122, v. pi. 73. f. 4. 

 Common in shell-sand. 



