CONTENTS. 



Page 

 Art. XLIX. On the vestiges of a placental Organization, 



and of an umbilicus^ discovered in a very small Foetus of 



the Didelphis Virginiana. By M. E. Geoffroy de 



SainT'Hilair e 403 



Art. L. Observations on the Structure of the Pholades. By 



John Edward Gray, Esq. M.G.S. 406 



Art. LI. Descriptions of some rare^ interesting, or hitherto 

 uncharacterized subjects of Zoology^ by N. A. Vigors, 

 jun. Esq. M. A. F.L.S. With Figures by James De 

 Carle Sowerby, Esq. F.L.S 409 



Art. LII. Proceedings of Learned Societies : — 



Zoological Club of the Limiean Society 418 



Royal Academy of Sciences of Paris 421 



Art. LIII. — Scientific Notices: — 



/^ew Species of Procellarice 425 



Bulla Haliotoidea 427 



On the Genera Sigaretus and Cryptostoma , . 427 



EXPLANATION OF THE PLATES. 



Plate XII. — Fig, 1. Cyprsea lentiginosa. 



2. albuginosa. 



3. Turdus. 



4. arabicula, n. 4. 



5. sulcidentata, n. 20. 



6. arenosa, n. 19. 



7. controversa, n. 15. 



8. zonata, n. 33. 



9. pulchra,n. 14. See n. 42, jj. 380. 



10. picta, n. 34. 



Plate XIII. — Muscicapa Lathami, p. 410. 



Plate XIV. — Antluis Richardi, p. 411. 



Plate XV. — Fig. 1. Cicindela princeps, p. 413. 



2. Ritchii, p. 414. 



3. Lyonii, p. 414. 



4. Gymnetis undulata, p. 413. 



5. hieroglypliica, p. 416. 



6. Mac-raspis clavata, p. 416. 



7. Rutela nitescens, p. 417. 



8. Lamia V notata, ib. 



9. perpulchra, p. 418. 



Plate XVI.— Psittacula.Kuhlii, p. 412. 



