330 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



another lobe or flap, which resembles a hood ; the foot-lobes being 

 lateral, and apparently used for locomotion only. This third flap, 

 however, forms part of the foot, and is merely a connecting membrane 

 between the two side lobes. The foot-lobes are very flexible, curling 

 inwards as well as flapping. Head triangular. The upper part 

 (which represents the arc of a circle) is thickly studded with short 

 tentacles. Heart bag - shaped, transparent, double, placed at the 

 extremity of the body, and beating with a regular action like a pulse." 

 Compare Souleyet, Voy. Bonite, Zool., vol. ii, p. 176. 



Clio ptramidata, L. 

 Clio pyramidata, L. : Syst. Nat., 12th ed., p. 1094 ; Pelseneer, 

 "Challenger" Rep., Pteropoda, pt. ii, p. 63 ; Tesch, Theco- 

 somata, etc., Siboga Exped., p. 29. 

 Cleodora pyramidata, L. : Locard, Exped. Scient. Trav. Talisman, 

 vol. i, p. 14. 

 "Porcupine" Expedition, 1869, Stations 13 (live), 15, 16, 19, 

 20 (live), 28, 40; 1870, Stations 14, 16, 17, 30, 54; Vigo Bay, 

 20 fathoms; off Rinaldo's Chair, 60-160 fathoms; Easel Amoush, 

 45 fathoms. 



Distribution. — Almost worldwide. Tertiary of South Europe. 

 Several records on the boxes in the Museum have been omitted, as 

 they appear either erroneous or not to refer to the " Porcupine." 



Clio striata (Rang). 

 Creseis striata, Rang: Ann. Sci. Nat., ser. i, vol. xiii, p. 315. 

 Clio striata, Rang: Pelseneer, "Challenger" Rep., Pteropoda, pt. ii, 

 p. 54 ; Tesch, Thecosomata, etc., Siboga Exped., p. 27. 

 "Porcupine" Expedition, 1870, Station 56. 



Distribution. — Atlantic, Indian, and Pacific Oceans. Tertiary of 

 South Europe. 



Clio subula (Quoy &, Gaimard). 

 Cleodora subula, Quoy & Gaimard : Ann. Sci. Nat., ser. i, vol. x, p. 233. 

 Clio subula, Quoy & Gaimard: Pelseneer, "Challenger" Rep., Ptero- 

 poda, pt. ii, p. 57 ; Tesch, Thecosomata, etc., Siboga Exped., 

 p. 28. 

 Styliola subulata, Quoy & Gaimard : Locard, Exped. Scient. Trav. 

 Talisman, vol. i, p. 18. 

 "Porcupine" Expedition, 1870, Stations 16, 17, 56; Adventure 

 Bank, 92 fathoms. 



Distribution. — Atlantic, Indian, and Pacific Oceans. Tertiary of 

 South Europe. 



CUVIERINA, Boas, 1886. 



CUVIERINA COLUMNELLA (Rang). 



Cmieria columnella, Rang : Ann. Sci. Nat., ser. i, vol. xiii, p. 323. 

 Cavierina columnella. Rang: Pelseneer, "Challenger" Rep., Pteropoda, 

 pt. ii, p. 66 ; Tesch, Thecosomata, etc., Siboga Exped., p. 32. 



"Porcupine" Expedition, 1870, Stations 16, 17, 22. 



Distribution. — Atlantic, Pacific, and Indian Oceans. 



