lituid^e: spirulirostra, beloptera. 117 



shell, rather produced on each side in front, and produced be- 

 hind into an acute conical tail, leaving a small concavity over 

 the tip in front of the arch of the whorls. 



Spirulirostra D'Orb. Ann. Sci. Nat. xvii. 362. t. 11. f. 16. 1842, 

 Moll. Viv. et Fos. i. 312. ; Desk, in Lamck. Hist. xi. 248. 



1. Spirulirostra Bellardii. 



Spirulirostra Bellardii VOrh. Ann. Sci. Nat. xvii. 302. t. 11. f. 

 16., Moll. Viv. el Fos. i. 312. t. 15. 



Fos. Middle Tertiary, Turin. 



3. EELOPTERA. 



Animal ? only known fossil. — Shell calcareous, 



conical, straight, or slightly curved, chambered; chambers pierced, 

 with a siphon on the '? edge. Enveloping case elongate, sub- 

 cylindrical in front, and sometimes winged on the sides, ending 

 in a blunt beak at the hinder end. 



Fos. Lower Tertiary formations. 



Beloptera Deshayes, MS, Ency. Meth. ii. 135. 1830, in Lamck. 



Hist. xi. 243. ; Desk. MS. in Blaine. Malac. Supp. 621. t. 11. f. 



8. 1825, Mem. Belemn. 3. f. 3. 1827; Sow. Min. Fos. t. 591.; 



D'Orb. et Feruss. Cephal. Acet. t. 3. f. 7. 9. t. 21. f. 11, 12. 1839, 



Moll. Viv. et Fos. i. 308. 

 Sepia species D'Orb. Sf Feruss. Tab. Mcth. Ceph. 67. 1825. 

 Sepia (subgenus) Gray, Proc. Zool. Soc. 1847, 205. 



* Lateral Expansions distinct. 



1. Beloptera belemxitoidea. 



Shell oval, oblong, curved, expanded on the sides ; above convex, 

 beneath concave ; beak blunt, straight. 



Beloptera belemnito'idea Blainv. Malac. Supp. 621. t. 11. f. 8. 



18-25 ; Dal. Sci. Nat. ad. viii. 290. t. 20. f. 8.; Desk. E. M. ii. 



135., Fos. Paris, 762. t. c. f. 4, 5, 6. ; D Orb. Moll. Viv. et Fos. 



i. 808. t. 14. f. 1. 4. 

 Beloptere Deshayes Blainv. Belemn. t. 1. f. 3. 

 Sepia Parisiensis UOrb. Sf Feruss. Tab. Ceph. 67. 1825, Ann. Sci. 



Nat. ii. 482. vii. 57. 

 Beloptera Parisiensis UOrb. Gray, P. Z. Soc. 1847, 205. 

 Dent de Poisson Guet. Mem. v. t. 2. f. 11, 12. 

 Beloptera Belemnoidea Blainv. 



Fos. Paris Basin. 



a. Adult, with large wing-like expansion and deep cavity. 

 Paris. Presented by J. E. Gray, Esq. 



