of British MoUusca. Gl 



Subordci- II. TIIECOSOMATA. 

 Fam. 2. Limacinids. 

 Genus 1. LiMACiNA. 



22. Limacina retroversa (Fleming) = Spirialis retroversUy 

 Jeffreys. 



Var. 1. Macandrei, F. & H. 



A pvoduced form, of which several specimens were 

 dredged by Mac Andrew 15 miles south of Mizen 

 Head, south of Ireland. The form ap{)roaches that 

 of L. huUmoideSj d'Orb., but the shell is smaller 

 and more delicate than in that species and the suture 

 more deeply cut. 



[Var. 2. Jeffreysii, F. & H. 



Only a single " very young shell " was found. 

 Stated by Jeffreys himself to be only the young.] 



23. Limacina helicoides^ Jeffreys. 



Limacina helicoides, JefiErevs, Ann. & Mag. Nat. Hist. ser. 4, vol. xix. 



(1877), p. 338. 

 Limacina helicoides, Pelseneer, Report * Challenger ' Pteropoda, pt. 2 



(1888), Thecosomata, p. 23, pi. i. fig. 1. 



* Porcupine ' ex})edition, 1869, off the west of Ireland, 

 Stat. 28, lat. 56° 44' N., long. 12° 52' W., dead at bottom. 

 It was also procured in the North Atlantic in the ' Valorous ' 

 expedition, by the 'Challenger' off the Azores, and by the 

 * Travailleur ' in the Bay of Biscay. 



{^Limacina hulimoides (d'Orbigny). 



Atlanta bidiinoides, d'Orbigny, Voy. dans I'AmcSr. m^rid. vol. v. (1836), 



p. 179, pi. xiii. tigs. 36-38. 

 Liynacina bidimoides, Boas, Spolia Atlantica, Bidrag til Pterodernes 



(1886), p. 47, pi. iii. figs. 36, 37. 



Pelseneer (' Challenger ' Report) records this species, which 

 occurs in all the oceans except the Arctic and Antarctic, as 

 " found by the first ' Porcupine ' expedition, 1869." I do not 

 know whence he procured the information, as I have no remem- 

 brance that Jeffreys has recorded it. It may be that speci- 

 mens are preserved in the British Museum. It depends upon 

 the station at which it was found whether it can be included 

 in our lists.] 



