MOLLUSC A. 81 



Fam. 23. Cancellariidae, Forbes & Hanley. 

 Genus 2. Trichotropis, Broclerip & Sowerby. 



Trichotropis borealis, Brod. & Sowerb. Op. cit. iv. p. 24.5, 

 v. pi. 79. f. 6. 



A single specimen from the stomach of a cod. 



Fam. 24. Aporrhaidae, Troschel. 

 Genus Aporrhai's, Da Costa. 

 Aporrhais pes-pdecani, 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. Buccinidae, Fleming. 

 Genus 1. Purpura, Bruguiere. 

 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 Rocks, 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 oi 

 the cod, haddock, and flounder. 



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