Crustacea of St. Andrews. 347 



Fam. Canceridae. 



Genus Cancee, L. 



Cancer pagurus, L. ; Bell, op. cit. p. 59. 



Abundant all round the rocky border in the laminarian 

 region, and frequent between tide-marks. In the stomach of 

 this species are many curious parasites, such as Tetrarhynchus 

 and Echinorhgnchus, probably derived from its food. Sections 

 of the carapace show internally tubular processes, apparently 

 connected with the hairs. 



Genus Pirimela, Leach. 



Pirimela denticulata, Mont. ; Bell, op. cit. p. 72. 

 Occasionally from deep water. Rare. 



* 



Fam. Portunidae. 



Genus Portunus, Leach. 



Portunus depurator, L. ; Bell, op. cit. p. 101. 



Dredged occasionally off the West Bocks on a sandy bottom, 

 cast ashore by storms, or found in the stomach of the cod. 



Portunus marmoreus. Leach j Bell, op. cit. p. 105. 

 On the West Sands after storms. Rather rare. 



Portunus holsatus, Fab. ; Bell, op. cit. p. 109. 



Not uncommon in the stomachs of cod and haddock. Saccu- 

 le na occurs on this species occasionally. 



Portunus pusittus, Leach ; Bell, op. cit. p. 112. 



Occasionally from deep water, and rather common in the 

 stomachs of the haddock and flounder. 



Genus Portumnus, Leach. 



Portumnus variegatus, Leach ; Bell, op. cit. p. 85. 

 Abundant on the sandy ground off the West Sands. 



Genus Carcinus, Leach. 

 Carcinus m&naSj L. ; Bell, op. cit. p. 76. 

 Everywhere abundant between tide-marks and in the 



