24 
THE VOYAGE OF H.M.S. CHALLENGED. 
# 6. Limacina lesueuri (d’Orbigny). 
1836. Atlanta lesueurii, d’Orbigny, Voyage dans l’Amerique meridionale, t. v. p. 177, pi. xx. 
figs. 12-15. 
1836. Atlanta rancjii, d’Orbigny, Voyage dans l’Amerique meridionale, t. v. p. 176, pi. xii. 
figs. 25-28. 
1840. Spinalis ventricosa, Eydoux et Souleyet, Description sommaire de plusieurs Pteropodes 
nouveaux ou imparfaitement connus, Revue Zoologique, t. iii. 
p. 236. 
1850. Limacina ventricosa, Gray, Catalogue of the Mollusca in the Collection of the British 
Museum, pt. ii., Pteropoda, p. 32. 
1886. Limacina lesueurii, Boas, Spolia atlantica, K. dansk. Vidensk. Selsk. Skriv., 6 Raekke, 
Bd. iv. p. 46, pi. iii. figs. 33, 34. 
For description and figures I refer to Souleyet . 1 I shall restrict myself to noting 
that in the form of its aperture, columella, and umbilicus, this species is closely allied to 
Limacina australis and Limacina retroversa, with which it forms a very natural sub- 
group. Though the spire is depressed, it preserves none the less the distinctness of its 
whorls, which are separated by a very well defined suture. 
Animal without a small lobe on the anterior dorsal margin of the fin. 
Habitat. — The following localities have been recorded : — Atlantic Ocean, from 36° S. 
(d’Orbigny) to the Bay of Biscay (Pfeffer). 2 Indian Ocean, Islands of St. Paul and 
Amsterdam (Velain, under MS. title Limacina crossei). West Pacific Ocean, 30° N. lat., 
170° W. long. (“Galathea” Expedition), towards Batavia (Boas); 3 East Pacific Ocean 
(d’Orbigny), to 42° S. lat. (Knocker). 
Challenger Specimens. — I. Living specimens. 
Between Stations 162 and 163, April 3, 1874; on the route from Melbourne to 
Sydney; lat. 38° 7' S., long. 149° 18' E. 
Station 175, August 12, 1874; Fiji to Raine Island ; lat. 19° 2' S., long. 177° 10' E. 
Station 216a, February 16, 1875 ; north of New Guinea; lat. 2° 56' N., long. 
134° 11' E. 
Between Stations 246 and 247, July 4, 1875 ; Yokohama to Sandwich Islands; 
lat. 36° 42' N., long. 171° 46' E. 
Between Stations 264 and 265, August 24, 1875 ; Sandwich Islands to Tahiti; 
lat. 13° 15' N., long. 152° 2' W. 
Station 337, March 19, 1876; Tristan da Cunha to Ascension Island; lat. 24° 38' S., 
long. 13° 36' W. 
On April 26, 1876 ; off St. Vincent (Cape Verde); lat. 16° 49' N., long. 25° 14' W. 
On May 7, 1876 ; off the Azores; lat. 34° 22' N., long. 34° 23' W. 
1 Voyage de la Bonite, Zoologie, t. ii. p. 216, pi. xiii. figs. 11-16. 
2 Uebersicht der auf S.M. Schiff Gazelle und von Dr. Jagor gesammelten Pteropoden, Monatsber. d. k. preuss. Akad. 
d. fViss. Berlin, p. 245, 1879. 
3 Spolia atlantica, p. 47. 
