372 pleurotomidjE. 



Bay, co. Galway (Walpole) ; Cork (Huraplireys) ; co. 

 Antrim, in 60 f. off Loch Ewe, and in 43 f. on the 

 Shetland coast (J. G. J.). The variety is from Fal- 

 mouth (Cocks and Barlee); Shetland, 78-86 f. (Barlee 

 and J. G. J.). D. reticulata belongs to our Red and 

 Coralline Crag (S. Wood, as Clavatula cancellata) , and 

 to the Italian tertiaries (Philippi and Calcara). It is 

 spread along the north- Atlantic coasts, from Brittany 

 (Collard des Cherres and Tasle) to Gibraltar (M' An- 

 drew), and throughout the Mediterranean, Adriatic, 

 and iEgean, at depths of from 4 to 35 f. The variety 

 has been dredged by Lilljeborg in Norway, by Loven 

 and Malm in Bohuslan (by the latter in 40 f.), and by 

 Forbes in the iEgean (as var. spinosa) in 105 f. 



This species varies remarkably in size. An Irish 

 adult specimen is only three lines long; another, from 

 Shetland (the varietal form), measures nearly an inch 

 and a quarter. Those from the Mediterranean are of 

 two kinds, one like ours, and the other (which is more 

 usual) having a shorter spire and very tumid whorls, 

 and averaging three-quarters of an inch in length. The 

 latter may therefore be considered the typical form. 

 The variety is extremely beautiful, and almost " para- 

 gons description ; " it will be figured in the next 

 volume. 



It is the Murex cancellatus of J. Sowerby (not Pleu- 

 rotoma cancellata of Calcara, nor Fusus cancellatus of 

 Mighels and Adams, both of which appear to be also 

 species of Defrancia) , M . echinatus of Brocchi, Pleuro- 

 loma Cordieri of Payraudeau, P. rude of Scacchi, and 

 P. purpureum of Philippi — not M. purpureus of Mon- 

 tagu; I described the present species as P. scabrum, 

 under the impression that it was distinct from the 

 Mediterranean shell and not merely a variety. 



