UTUIDiE : LITUUS. 
115 
cular kind of fin on each side. It has been suggested that, this 
may depend on the sex of the specimens. De Blainville’ s specimen 
was a female, but the sex of the others is unknown. 
Lituus Brown , Jam. 1756; Humph. MS. 1797. 
Ammonia Gualtieri , 1742 ; Breyn , Polyth. 17 . 
Pedum Humph. Mus. Colon. 1797, not Lam. 
Spirula Lamck. Syst 1801, Hist. ed. 2. xi. 280. ; Blainv. Anal. 
Franc, et etrang. Anal, et Phys . i. 369. t. 1837 ; Gray , Ann. and 
Mag. N. Hist. xy. 257. 234. 445. t. ; H Orb. Moll. Viv. et Fos. i. 
314. ; Owen , Zool. H.M. S. Samarang , 1848. 
Spirula a. Blainv. Malac. 1825 ; not b and c. 
Spirulsea ! Peron Sf LeSueur. 
Cornu Ammonis Humph. 
Nautilus sp. Lister , 1685. 
The following names have been applied to the Shells of this 
genus, but it is impossible to determine to which of the species 
(if they are distinct) the names belong : — 
Nautilus exiguus Lister , Hist, sive Syn. lib. iv. t. 550. f. 2. 
Cornu Ammonis Humph. Thesaur. t. 20. n. 1. 
Cornu Hammonis legitimus Klein , Ostrac. 5. sp. 1. t. 1. n. 6. 
Cornu Hammonis Geve , Monat. Belust. ou Fssais Verest. t. 3. f. 8.; 
Martini , Conch. Cab. i. 274. t. 18. f. 1. 
Lituus minor Brown , Nat . Hist. Jamaica , 398. 
Nautilus spirula Linne, Syst. Nat. 1767; Schrceter, Einleitung, i. 
13.; Gmel. Syst. Nat. 3371. n. 9.; Schreber , Versuch. i. L; 
Burrow , Elements of Conchol. t. 12. f. 3. 
Spirula fragilis Lamck. Syst. des An. s. Vert. 102. ; Bose, Hist. 
Nat. des Coq. v. t. 52. f. 2, 3. ; Hoissy, Buff, de Sonnin. v. 15. ; 
Montfort, Conch. Syst. 99.; Schumach. Vers. test. 256.; D' Orb. 
Moll, des Antilles , i. 64. n. 16., Moll. Viv. et Fos. i. 315. t. 16. 
Spirula australis Johnst. Edin. Journ. April, 1828, p. 74. 
Spirula Peronii Lamarck. Hist. An. s. Vert. vii. 601. n. 1. ; H Orb. 
Tab. des Ceph. 68., Moll, des Canaries, 24. n. 8. ; Blainville, 
Faune Franq. 22. t. 3. b. f. 1. ; Sowerby, Genera of Shells; 
Blainv. Nouv. An. du Mus. iii. 18. t. 1. ; Cuvier, Hegne Anim. t. 
8. f. 1. ; Potiez et Mich. Gall, des Moll. i. 9. n. 1. ; Heeve, Conch. 
Syst. ii. 296. t. 298. 
* The posterior Part of the Body ivithout any ring, and the last 
Whorls of the Shell exposed . — Males ? — Spirula. 
1. Lituus prototypus. 
Spirula prototypus Peron, Voy. Terres Austral, t. 30. f. 4. 1840, 
cop. Gray, Ann. N.H. xv. t. 15. f. 7. ; -D’ Orb. Moll. Viv. et Fos. 
t. 16. 2. ; Blainville, Man. t. . f. . ; cop. Gray, 1. c. 1. 15. f. 6. 
