82 MARINE FAUNA OF ST. ANDREWS. 



Genus 6. Fusus, Bruguiere. 



Fusus autiquus, L. Op. cit. iv. p. 323, v. pi. 85. f. 1 & 2. 



Abundant in the coralline zone, and frequently thrown on 

 shore after storms. 



Fusm i/racilis, Da Costa. Op. cit. iv. p. 335, v. pi. 86. f. 2. 

 Common on the West Sands after storms, and often brought 

 in by the fishing-boats. 



Fusus propinquity, Alder. Op. cit. iv. p. 338, v. p. 219, 

 pi. 86. f. 3. 



Occasionally procured from the deep-sea lines of the fisher- 

 men. 



Fam. 29. Nassidae, Stimpson. 



Genus 1. Nassa, Lamk. 



Nassa incrassata, Strom. Op. cit. iv. p. 351, v. pi. 88. f. 1. 



Common in the laminarian region and under stones between 



tide-marks ; while worn shells are abundant in debris at the 



East Rocks. An egg-capsule is shown in Plate IX. fig. 4. 



Fam. 30. Pleurotomidae, Loven. 



Genus 1. Defkancia, Millet. 

 Defrancia linearis, Mont. Op. cit. iv. p. 368, v. pi. 89. f. 2. 

 From deep water ; rather rare. 



Genus 2. Pleuuotoma, Lamk. 

 Pleurotoma costata, Donovan. Op. cit. iv. p. 379, v. pi. 90. f. 3. 

 Occasionally in shell-debris from the West Sands. 



Pleurotoma rufa, Montagu. Op. cit. iv. p. 392, v. pi. 91. f. 6. 

 Common on the West Sands after storms. 



P/eurotoma turricula, Montagu. Op. cit. iv. p. 395, 

 v. pi. 91. f. 7. 



Abundant under the same circumstances. 



