7-> MARINE FAUNA OF ST. ANDREWS. 



Littortna litorea, L. Op. cit. iii. p. 368, v. pi. 65. f. 5& 5 a. 

 between tide-marks in vast numbers. Often eaten. 



Genus 3. Rissoa, Frcminville. 

 Rissoa parva, Da Costa. Op. cit. iv. p. 23, v. pi. 67. f. 3 & 4. 

 In great numbers on the seaweeds jn the laminarian region 

 all round, especially off the East Rocks. Var. interntpta is 

 also common in shell-sand. 



Rissoa striata, Adams. Op. cit. iv. p. 37, v. pi. 68. f. 2. 

 Common under stones between tide-marks. The var. arctica 

 is the prevailing form. 



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

 Occasionally in deep water and in shell-sand. 



Rissoa semistriata, Mont. Op. cit. iv. p. 46, v. pi. 68. f. 8. 

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



Genus 4. Htdrobia, Hartmann. 

 Hydrobia uIvcb, 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. 



Earn. 11. Skeneidae, ('lark. 



Genus I. Skenea, Fleming. 

 Skenea planorbis, Fab. Op. cit. iv. p. 65, v. pi. 70. f. 1. 



< 'oinmon in rock-pools amongst Ceramium and other alga'. 



Genus 2. Homalogyka, Jeffreys. 



//oma/iK/i/ra rota, Forbes &- llanlev. Op. cit. iv. p. 71. 

 v. pi. 70. f. 3. 



In shell-debris from the West Sands. Dead. 



