of British Mollusca. 149 



Suborder III. T^XIOGLOSSA. 



Fam. 1. Tritonidae. 



Genus 1. Teitox, Monttort, 1810 

 {=Tritonium, Cuvier). 



1. Triton nodi/er, Lamarck. 



2. Trit07i cutaceus (Linn.). 



Fain. 2. Cassididae. 

 Genus 1. Cassidaria, Lamarck, 1812. 



1. Cassidaria rugosa (Linn.). 



Buccimim ritgosum, Linn. Mantissa (1771), p. 549. 



Buccinian tyrrhemim, Cliemnitz, Conch.-Cab. (1788), vol. x. p. 192, 



pi. cliii. figs. 1461, 1462. 

 Cassidaria depressa, Philippi, 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, Bucquov, Dautzenberg, and Dollfos, MoIIusques du 



EoussiUon, fasc. ii. (1882)' pi. ix. fig. 3. 



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

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

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

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

 of Ireland, lat. 50° 29' 2&' N., long. 11° 4' W., in 400 fath. 

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

 Echinoderms Spatangiis jnirpureus, Echinus norvegicu?, and 

 Nj/mphaster subspinosus ] the Crustacea Bathynectes siiperhuSj 

 Ehalia mix, Lispognathns Thomsoni, Scyramathea Carpenteri^ 

 Eup n gurus cam eus, and Parapagurus pilosimanus] and the 

 Actinozoa Epizoanthus paguriphilus and Actinauge Richardi ', 

 also a living example of another verj interesting addition to 

 our molluscan 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), Baj of 

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

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

 {Eocard). 



