328 PROCEEDINGS OF THE M.\LACOLOGTCAL SOCIETY. 



LiMACiNA HELicoiDES, Jeffreys. 

 Limacina helicoides, Jeffreys: Ann. Nat. Hist., ser. rv, vol. xis (1877"), 

 p. 338; Pelseneer, "Challenger" Rep., Pteropoda, pt. ii, 

 p. 23, pi. i, tig. 5. 

 "Porcupine" Expedition, 1869, Station 28; 1870, Stations 16, 17. 

 Distribiition.-^Stexeral stations in the Atlantic, from off the British 

 Isles to the Azores, always dead and at considerable depths. 



Locard ' has, erroneously, placed this name in the synonymy of 

 X. Melicina, Phipps ; but he seems to have been unaware of Jeffreys' 

 description and Pelseneer' s figure. 



Limacina inflata (D'Orbigny). 

 Atlanta injlata, D'Orbigny : Voy. Amer. Merid., vol. v, p. 174. 

 Limacina inflata, D'Orbigny: Pelseneer, "Challenger" Rep., Pteropoda, 

 pt. ii, p. 17 ; Locard, Exped. Scient. Trav. Talisman, vol. i, 

 p. 22 ; Tesch, Thecosomata, etc., Siboga Exped., p. 11. 

 "Porcupine" Expedition, 1870, Stations 16, 17, 56. 

 Distribution. — Atlantic, Indian, and Pacific Oceans, etc. Fossil in 

 South Europe. 



Limacina eetkoversa (Fleming). 

 Heterofusus retroversus, Fleming : Mem. Wernerian Soc, vol. iv, 



p. 498. 

 Limacina retroversa, Fleming: Pelseneer, "Challenger" Rep., Pteropoda, 

 pt. ii, p. 27 ; Locard, Exped. Scient. Trav. Talisman, vol. i, 

 p. 23. 

 "Porcupine" Expedition, 1869, Station 235; 1870, Stations 3, 16, 

 17, 30, 56. 

 Distribution. — Both sides of North Atlantic. 



At Stations 17 and 56 the series included the variety Macandrecs. 

 Despite the careful details given in the " Challenger" Report to show 

 that this form is not found in the Mediterranean, but is there replaced 

 by L. trochiformis, D'Orb., I have been unable to sever any of my 

 specimens from L. retroversus. See, for an interesting note on the 

 occurrence of the form in British seas, Proc. Soc. Glasgow, vol. iv, 

 p. 230. 



Limacina triacantha (Fischer). 



Embolus triacantha, Fischer : Journ. Conchyl., vol. xxx (1882), p. 49. 



Limacina triacantha. Fischer : Pelseneer, " Challenger " Rep., 



Pteropoda, pt. ii, p. 20, pi. i, figs. 1, 2; Dall, Bull. U.S. 



Mus., vol. xxxvii, p. 80. 



Protomedia triacantha, Fischer : Locard, Exped. Scient. Trav. Talisman, 



vol. i, p. 27. 

 Limacina carinata, Jeffreys: Ann. Nat Hist., ser. v, vol. vi (1880), 

 p. 375 ; Folin, Les Fonds de la Mer, vol. iv, p. 143. 

 "Porcupine" Expedition, 1870, Station 17. 

 Distribution. — Both sides of Atlantic (vide Locard, Dall, etc.). 

 If Embolus elatus, Seguenza, be identical, the species is also found 

 in the Pliocene. 



1 Exped. Scient. Trav. Talisman, vol. i, p. 21. 



