MOLLUSCA. 
81 
Fam. 23. CancellariidaB, Forbes & Hanley. 
Genus 2. Trichotropis, Broderip & Sowerby. 
Trichotropis borealis , Brod. & Sowerb. Op. cit. iv. p. 245, 
v. pi. 79. f. 6. 
A single specimen from the stomach of a cod. 
Fam. 24. Aporrhaidse, Troschel. 
Genus Aporrhais, Da Costa. 
Aporrhais pes-pelecani, L. Op. cit. iv. p. 250, v. pi. 80. f. 1. 
Abundant on the West Sands after storms, and frequent in 
the debris of the fishing-boats. 
Fam. 27. Buccinidse, Fleming. 
Genus 1. Purpura, Bruguibre. 
Purpura lapillus , L. Op. cit. iv. p. 276, v. pi. 82. f. 1. 
Very abundant between tide-marks on rocks and stones. 
Varieties are common. 
Genus 2. Buccinum, L. 
Buccinum undatum , L. Op. cit. iv. p. 285, v. pi. 82. f. 2-5. 
Common in the living state (var. littoralis ) in pools at the 
East Bocks, especially where a stream of salt water rushes 
through the seaweeds. This species spawns in October, 
November, and the following months ; the young are found 
in swarms on the egg-cases in May. Frequent on the West 
Sands after storms. 
Genus 5. Trophon, De Montfort. 
Trophon truncatus , Strom. Op. cit iv. p. 319, v. pi. 84. f. 6. 
Not uncommon in the fishing-boats, and the stomachs of 
the cod, haddock, and flounder. 
M 
