RHYNCHONELLA. 21 



besides admitting the presence of a slightly developed deltideum in R. psittacea, places it 

 in the same genus as R. vespertilio, only under the generic name of Hypothyris, Phillips, 

 not being aware at the time of Fischer's priority of date, his type having been established 

 on Rhynchonella lowia, a Russian Oolitic species, somewhat similar in form to our common 

 Lias R. acuta, and possessing the essential characters. 



9. Rhynchonella psittacea, Chemnitz, Sp. Plate I, fig. 7 ai recent; fig. 19 aJ , tertiary. 



Anomia rostrum-psittact, Chemnitz. Conch. Cab., vol. viii, pi. 106, p. 78, fig. 713, 



1785. 



— psittacea, Gmelin. Syst. Naturae, p. 3348. 



— — Turt. Conch. Die, p. 5, figs. 42, 44. 



— — Dillw. Recent Shells, vol. i, p. 296 ; Index Testaceolog., pi. ii, 



fig. 27. 



— — Mawe. Linn. Conch., pi. xv, fig. 3. 



Lampas psittacea, Humphrey. Museum Calonnianum, p. 834, 1797. 1 

 Terebratula psittacea, Lamarck. An. sans Vert., vol. vi, 1819. 

 _ _ Turt. Dithyra Brit., p. 336. 



— — Fleming. Brit. Animals, p. 368. 



— — Thompson. Ann. Nat. Hist., vol. xiii, p. 433 ; Brit. Marine 



Conch., p. 127. 



— — Brown. Illust. Conch. G. B., pi. lxiiiandpl. xlvi, figs. 2, 3, 4. 



— — Alder. Cat. Moll. Northumberland and Durham, p. 74. 



— — Crouch. Introd. Lam. Conch, pi. xiii, fig. 4. 



— — Sow. Genera Shells, Terebratula, fig. 5 ; Thesaurus Conch., 



vol. i, p. 342, pi. lxxi, figs. 78 — 80. 



— — Sow. (jun.) Conch. Manual, p. 202. 



— — Gould. Invert. Massach., pi. 142. fig. 91. 



— — Reeve. Conch. Systemat., pi. 126, fig. 5. 



— — Forbes and Hanley. British Mollusca, pi. lvii, figs. 1 —3. 



— — Forbes. Mem. Geol. Survey, vol. i, p. 407. 



— — Morris. Catal. of Br. Fossils. 1S43. 



— _ Lyell. Geol. Proc.,vol. hi, p. 119; Encyc. Meth., p. 224, fig. 3. 



— — Bronn. Index Pal., vol. ii, p. 1247. 



— — Tennant. Strat. List of Brit. Fossils, p. 17, 1847. 

 Hypothyris psittacea, King. Annals Nat. Hist., vol. xviii, p. 238 ; and Monograph 



of the Permian Fossils of England, p. 65, 1850. 

 — — Morris. Quart. Journal of the Geol. Soc, vol. ii, pp. 382 — 9. 



1 In 1797, Humphrey proposed the Genus Lampas, in which he places the following species: — 

 L. columbina {Anomia terebratula, Linn.), L. truncata, L. pectiniformis, L. psittacea, L. caput-serpentis, 

 and L. sanguinea. This genus, whicli has been adopted by no one that I am aware of but Mr. Gray, in 

 the Coll. of Br. Mus., is composed of a number of species, all of which have since been placed in separate 

 genera. In 1767, Davila ('Catal. Syst. et Raisonnc des Cur. de la Nature') gives two very good figures, 

 pi. xx, fig. b, of R. psittacea, under the name of Bee de Perroquet. Lister likewise illustrates this species 

 in Tab. 211, fig. 46, of his 'Hist, sive Synopsis Meth. Couchyliorum,' 1685. 



