32 
THE VOYAGE OF H.M.S. CHALLENGER. 
Station 33, April 4, 1873 ; off Bermuda; lat. 32° 21' 30" N., long. 64° 35' 55" W.; 
depth, 435 fathoms ; bottom, coral mud. 
Station 85, July 19, 1873 ; off Palma Island; lat. 28° 42' N., long. 18° 6' W r, depth, 
1125 fathoms ; bottom, volcanic mud. 
Station 120, September 9, 1873 ; off the coast of South America, between Pernam- 
buco and Bahia ; lat. 8° 37' S., long, 34° 28' W. ; depth, 675 fathoms ; bottom, red mud. 
Station 122, September 10 , 1873 ; off the coast of South America, between Pernam- 
buco and Bahia ; lat. 9° 5' S., long. 34° 50' W. ; depth, 350 fathoms ; bottom, red mud. 
Station 185, August 31, 1874; off Raine Island; lat. 11° 35' 25" S., long. 
144° 2' 0"E.; depth, 135 fathoms; bottom, coral sand. 
Station 219, March 10, 1875 ; Admiralty Islands to Yokohama; lat. 1° 54' 0" S., 
long. 146° 39' 40" E.; depth, 150 fathoms ; bottom, coral mud. 
Peraclis, 1 Forbes {emend.). 
1836. Heliconoides , d’Orbigny (pars), Voyage dans FAmerique Meridionale, t. v. p. 174. 
1840. Spinalis, Eydoux et Souleyet (pars), Description sommaire de quelques Pteropodes 
nouveaux ou imparfaiteinent connus, Revue Zoologique, t. iii. p. 235. 
1844. Peracle, Forbes, Report on tbe Mollusca and Radiata of the ZEgean Sea, and on tbeir 
distribution, considered as bearing on Geology, Rep. Brit. Assoc., 1843, 
p. 186. 
1847. Campylonaus, Gray (non Benson), A List of tbe Genera of Recent Mollusca, their 
synonyms and types, Proc. Zool. Soc. Lond., 1847, p. 149. 
1858. Euromus, A. and H. Adams, Tbe Genera of Recent Mollusca, vol. ii. p. 613. 
1876. Limacina, Jeffreys (pars), New and Peculiar Mollusca of tbe Family Eulimidse and other 
Families of Gastropoda, as well as of tbe Pteropoda procured in tbe 
“Valorous” Expedition, Ann. and Mag. Nat. Hist., ser. 4, vol. xix. p. 337. 
Characters and Description . — Shell with spire short but projecting, with bulging 
whorls rapidly increasing towards the very large and elongated aperture, which ends 
anteriorly in a very sharp angle. Spiral columella, prolonged into an elongated 
rostrum. No umbilicus. Surface smooth or finely reticulate. 
Operculum subcircular, multispiral, left-handed. 
Animal previously unknown, or supposed to be identical with that of the other 
Limacinidse. Krohn 2 and Costa 3 have observed the living animal, but have not 
perceived the differences between it and the true Limacina type. 'The differences are 
as follows : — 
1. Head distinct, prolonged into a proboscis analogous to that of the Cymbullidse (for 
example the old larvae of Gleba). 
1 Per, meaning exaggeration, and aclis, a small javelin, in allusion to the long rostrum of the shelL 
2 Beitrage zur Entwickelungsgeschicbte der Pteropoden und Heteropoden, p. 43, under tbe name of .Spvrialis clathrata . 
3 At Naples, under tbe name of Spirialis recurvirostra. 
