62 
Rev. Canon Norman’s Revision 
Genus 2. Pekacle, Forbes. 
24. Peracle diversa, Monterosato. 
Spirialis diver sa, Monterosato, Nuova Revista delle Concliiglie Medi- 
terranee (1875), p. 50. 
Peracle diver sa, Monterosato, Bull, della Soc. Malacol. Ital. vol. vi. 
(1880), p. 80. 
Peracle diver sa, 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 off the south of Ireland by the 
‘ Flying Fox ’ in 1889. 
Fam. 3. CavolinidaB. 
Genus 1. Clio, Linnd. 
25. Clio pyramidata , Linn£. 
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 u the surface waters teemed with 
Pteropods, Cleodora lanceolata [i. e. Clio pyramidata ] being 
taken in abundance.” 
Genus 2. Cavolinia, Abildgaard. 
26. Cavolinia trispinosa (Lesueur). 
Hyalcea trispinosa, Lesueur, MSS. in de Blainville ( Hyale) } Diet, des 
Sci. Nat. (1821), vol. xxii. p. 82. 
Hyalcea mucronata , Quoy and Gaimard, Ann. d. Sci. Nat. s6r. i. vol. x. 
(1827), p. 231, pi. viii. b. figs. 1, 2. 
Hyalcea trispinosa , Boas, Spolia Atlantica, Bidrag til Pterodernes (1886), 
p. 92, pi. i. fig. 3, pi. ii. fig. 14, pi. iv. fig. 52, pi. v. fig. 93. 
Cavolinia trispinosa , Pelseneer, 6 Challenger ’ Report, Pteropoda, pt. ii. 
(1888) p. 76. 
A specimen was washed ashore at Youghal (Brit. Conch, 
y. p. 117) attached to a mast and found by Dr. Robert Ball 
in 1820. Dead shells from 250-1000 fathoms off the south 
of Ireland, c Flying Fox,’ 1889 (E. A. Smith). It was 
dredged also by the ‘ Porcupine,’ 1869, Stat. 1, off Yalentia. 
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. 
