82 
MARINE FAUNA OF ST. ANDREWS. 
Genus 6. Fusus, Bruguikre. 
Fusus antiques, L. Op. cit. iv. p. 323, v. pi. 85. f. 1 & 2. 
Abundant in the coralline zone, and frequently thrown on 
shore after storms. 
Fusus gracilis , 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 propinquus, 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, Lovdn. 
Genus 1. Defrancia, Millet. 
Defrancia linearis , Mont. Op. cit. iv. p. 368, v. pi. 89. f. 2. 
From deep water ; rather rare. 
Genus 2. Pleurotoma, 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. 
Pleurotoma turricula , Montagu. Op. cit. iv. p. 395, 
v. pi. 91. f. 7. 
Abundant under the same circumstances. 
