62 Rev. Canon Norman's Revision 



Genus 2. Peracle, Forbes. 



24. Feracle diversa, Monterosato. 



Spirialis diversa, Monterosato, Niiova Revista delle Conchiglie Medi- 



terranee (1875), p. 50. 

 Peracle diversa, Monterosato, Bull, della Soc. Malacol. Ital. vol. vi. 



(1880), p. 80. 

 Peracle diversa, E. A. Smith, Ann. & Mag. Nat. Hist. ser. 6, vol. iv. 



(1889), p. 421. 



Dead shells, doubtfully referred to this species, recorded by 

 E. A. Smith as procured oif the south of Ireland by the 

 'Flying Fox' in 1889. 



Fam. 3. Cavolinidae. 

 Genus 1. Clio, Linn^. 



25, Clio 'pyramidata^ Linnd. 



Dr. Jeffreys and myself frequently dredged this species in 

 the Shetland seas, but did not find it living. It was taken in 

 many of the ' Porcupine ' dredgings of 1869, and during the 

 recent cruise of the ' Flying Fox ' off the south of Ireland 

 (1889) it is stated that "the surface waters teemed with 

 Pteropods, Cleodora lanceolata [i. e. Clio 2^y^'<ji''>nidata\ being 

 taken in abundance." 



Genus 2. Cavolinia, Abildgaard. 



26. Cavolinia trispinosa (Lesueur). 



Ui/al(ea trispinosa, Lesueur, MSS. in de Blaiuville [Hyale), Diet, dea 



Sci. Nat. (1821), vol. xxii. p. 82. 

 Hyalcea mucronata, Quoy and Gaimard, Ann. d. Sci. Nat. S(5r, i. vol. x. 



(1827), p. 231, pi. viii. b. figs. 1, 2. _ 

 Hyalcea trispinosa, Boas, Spolia Atlantica,BidragtilPterodernes (1886), 



p. 92, pi. i. fig. ?,, pi. ii. fig. 14, pi. iv. fig. 52, pi. v. fig. 93. 

 Cavolinia trispinosa, Pelseneer, ' Challenger ' Report, Pteropoda, pt. ii. 



(1888) p. 76. 



A specimen was washed ashore at Youghal (Brit. Conch. 

 V. p. 117) attached to a mast and found by Dr. Kobert Ball 

 in 1820. Dead shells from 250-1000 fathoms off the south 

 of Ireland, ' Flying Fox,' 1889 {E, A. Smith). It was 

 dredged also by the * Porcupine,' 18(39, Stat. 1, off Valentia. 



It is a very common species in the more southern parts of 

 the North Atlantic, and is found in the South Atlantic, Pa- 

 cific, and Indian Oceans. 



