of British Mollusca. 149 



Suborder III. T^NIOGLOSSA. 



Fara. 1. Tritonidae. 



Genus 1. Triton, Montfort, 1810 

 [=Tritomum^ Cuvier). 



1. Triton nodifer^ Lamarck. 



2. Triton cutaceus (Linn.). 



Fam. 2. Cassididae. 

 Genus 1. Cassidaria, Lamarck, 1812. 



1. Cassidaria rugosa (Linn.). 



Buccinum rugosum, Linn. Mantissa (1771), p. 549. 



Buccimtm tyrrheniim, Clieuimiz, Conch.-Cab. (1788), vol. x. p. 192, 



pi. cliii. figs. 1461, 1462. 

 Cassidaria depressa, Pbilippi, Moll. Sic. vol. ii. (1844), p. 186, pi. xxvii. 



fig. 3, varietas, 

 Cassidaria rugosa, Hidalgo, Moluscos de Espana &c., 1870-82, pi. . 



fig. 1. 

 Cassidaria tyrrhena, Bucquoy, Dautzenberg, and DoUfus, Mollusques du 



Roussillon, fasc. ii. (1882) pi. ix. fig. 3. 



This species was first recorded as a member of our fauna by 

 Mr. G. C. Bourne, who procured two specimens (one of 

 which preserved with the animal in spirits is in my collection) 

 in a trawling-cruise of H.M.S. 'Research' off the south-west 

 of Ireland, lat. 50° 29' 26'' N., long. 11° 4/ W., in 400 fath. 

 In the trawl with it were the fish IlaJoporphyrus eques ; the 

 Echinoderms Spatangus purjjureus, Echinus norvegicusj and 

 Nymphaster suhspinosus ; tiie Crustacea Bathynectes superhus, 

 Ebalia mix, Lispognathus Thomsoni, Scyramathea Garpenteri^ 

 Eupnguriis carneus, and Parapaguncs pilosimanus ; and the 

 Actinozoa Epizoanthus paguriphilus and Actinauge Richard i ; 

 also a living example of another very interesting addition to 

 our moUuscan fauna, Solarium mediterraneum, Monterosato 

 (see G. C Bourne, " Report of a Trawling-Cruise in H.M.S. 

 ' Research ' off the South-west of Ireland," Journ. Marine 

 Biol. Assoc. United Kingdom, new series, vol. i. 1889-90, 

 p. 306). Cassidaria rugosa has been since several times 

 recorded off the same part of Ireland (see Marshall, Journ. 

 Conchol. vol. vii. p. 38()). 



Distribution. Mediterranean, common. In the Atlantic it 

 has been taken at Guetaria {Hidalgo), Cadiz {Paz), Bay of 

 Biscay, ' Porcupine ' and ' Travailleur ' {Jeffreys), Belle He, 

 Hoedic, and Croisic {Cailliaud), off Marocco, 'Talisman' 

 {Locard) . 



