of British Mollusca. 
63 
Order II. 0 P I S T II O B R A N C II I A T A. 
Suborder I. TECTIBRAN CHIATA. 
A. Cephalaspidea. 
Fam. 1. ActaBonidse. 
Genus Action, Montfort. 
27. Actceon tornatilis. 
Var. 1. suhulata , Searles Wood. 
Var. 2. tenella , Loven. 
Yar. 3. hullceformis , Jeffreys. 
28. Actceon exilis, Jeffreys. 
Actceon exilis , Jeffreys, Ann. & Mag. Nat. Hist. ser. 4, vol. vi. (1870), 
p. 21, and vol. xix. (1877), p. 335. 
Auriculina insculpta , Verrill, Proc. U. S. Nat. Mus. vol. iii. (1880), 
p. 381. 
Actceon nitidus , Verrill, Trans. Conn. Acad. vol. v. (1882), p. 540, 
pi. lviii. fig. 21. 
Actceon exilis , Dali, Bull. Mus. Comp. Zool. vol. xviii. (1889), p. 38. 
‘ Porcupine ’ expedition, 1869, in 1215 fathoms, off Ireland 
to the south-east of Rockall (Stat. 28). 
It has been found also in the North Atlantic in 1450 
fathoms, ‘ Valorous,’ off the Lusitanian coasts, 227-994 
fathoms, ‘Porcupine,’ 1870, and in the Mediterranean, 92- 
1456 fathoms. Off east coast of Florida, 150-200 fathoms, 
and Gulf of Mexico, 200 fathoms (Dr. Busk) ; off Martha’s 
Vineyard, East America, 312-407 fathoms (Verrill). 
Jeffreys states that it has been found by the late Prof. 
Seguenza fossil in the older Pliocene of Calabria. 
Fam. 2. TornatinidaB. 
Genus 1. Tornatina, A. Adams, 1850 (= Utriculus , 
Brown, 1845, non Schumacher, 1817). 
29. Tornatina obtusa (Montagu). 
Var. Lajonhaireana (Basterot). 
30. Tornatina mammillata (Philippi). 
31. Tornatina truncatula (Bruguibre). 
Var . pellucida (Brown). 
32. Tornatina umbilicata (Montagu). 
Var. strigella (Lov6n). 
33. Tornatina nitidula (Lov^n). 
