294 PROF. HUXLEY ON THE ALECTOROMORPH.«. [May 14, 



Hab. Peter Botte Mountain, Mauritius {Dr. Power). 



For an example of this species I am indebted to the kindness of 

 Dr. Power, who collected it. It was sent to me under the name of 

 vittata, by which it appears it has been long known at Mauritius. 



Cyclophorus layardi, H. Ad. (PI. XXVIII. fig. 21.) 



C. testa late umbiUcata, depressa, soUdula, confertim oblique striata 

 et liris pluribus distantibus sculpta, sub epidermide fusca fiavi- 

 dula; spira parum elevata, apice obtusulo, sutura profunda; 

 anfr. 5, convexis, ultimo antice descendente ; apertura obliquu, 

 subcirculari, superne angular i ; perist. conlinuo, duplici, interno 

 breviter expanse, albido, externo expanso, superne dilatato, adnato. 

 Op. corneum, tenue, extus subconcavum, arctispirum. 



Diam. maj. 20, min. 22, alt. 1 1 mill. 



Hab. Ceylon {Mr. Thwaites). 



DESCRIPTION OF PLATE XXVIII. 



Fig. 1. Conus {Chelyconics) borhonicus, p. 288. 

 ' 2. NevilUa 2ncta, p. 289. 



3. hicida, p. 289. 



4. Sfi/Ufer speciosus, p. 289. 



5. Nanina {Macroc-hhimys) ycoffrcyi, p. 289. 

 fi. Discus scrrcdus, p. 290. 



7. Acicula maiirifiuna. p. 290. 



8. Vertigo {A/iea) horbonicu, p. 290. 



9. Gihbus {Gibbulina) dcshayesi, p. 290. 



10. ( ) morekii, p. 291. 



11. ( ) cylindreUus, p. 291. 



12. Fmnca {Ehnci) ncviUi. p. 291. 



13. Cyafhopoma bJanforJi. p. 291. 



14. Omiihahfropis horhunica, p. 292. 



15. Sci-obifidaria {C'tqxvi) rosfrafa, p. 292. 



16. Plicifer iicvilli, p. 293. 



17. (Jyclostremn nevilH, p. 293. 



18. {Daronia) suhdisjimcta, p. 293. 



19. Corhula {Azara) rosfrafa, p. 293. 



20. Nanina {MacroMamys) poweri, p. 293. 



21. Cyclophorus layardi, p. 294. 



8. On the Classificatiou aud Distribution of the Akctoro- 

 morphoi and Heteromorphce. By T. H. Huxley, F.R.S., 

 V.P.Z.S., &c. 



[With a Map.] 



The characters and affinities of the Gallinaceous Birds, or Alec- 

 toromorphcB, have been discussed within the last few years by two 

 very competent writers — M. Blanchard* and Mr. Parker. The 

 memoir "On the GalUnaceous Birds and Tinamous"t by the latter 



* " De la dutermination do quelques Oiseaux Fossilcs ct dcs caracleres Ostco- 

 logiques dcs Gallinaces ou Gallides" (Ann. d. Sc. Nat. ser. 4^ 1857, t. vii.). 

 t Transactions of the Zoologiciil Society, vol. v. p. 149 (1864). 



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