236 Dr. J. E. Gray on the Varieties of Dogs. 



2. Rupellaria carditoides {Venerujjis) , Del ess. Rec. de Coq. 



pi. 5. f. 3. 



PuUastra carditoides, Catlow. 

 Hah. Tsus-Sima (in oyster-shells), Oki Islands. 



3. Rupellaria viacrophylla^ Desli. {Venerupis), Cat, Concliif. 



Brit. Mus. p. 193. 

 Hab. Kuro-Sima. 



4. Rupellaria monstrosa, Cliemn. {Venus), Conch, pi. 42. f.445, 



446. 

 Hab. Tsus-Sima (in slate-stone), Kino-0-Sima (in Madre- 

 pores). 



Genus Clementia, Gray. 



1. Cleme7itia? similis, Sow. Thes. Conch, pi. 151. f. 154. 

 Hah. Tatiyama. 



2. dementia moretonensis, Desh. Proc. Zool. Soc. 1853, p. 18. 

 Hab. Kino-0-Sima. 



Genus Trapezium, Megerle. 



1. Trapezium angulatum, J^^iva. {Ci/pricardia)yljaxa. 2; Wood, 



Ind. Test. Suppl. pi. 2. f. 2. 

 Hab. Kino-0-Sima, in Madrepores. 



2. Trajjezium rostratum, Lam. {Cypricardia) , Lam. 3. 



Chama rostrata, Wood. 

 Hah. Tsus-Sima, in oyster-shells. 



Genus CORALLIOPHAGA, Blainv. 



Coralliophaqa lithophageJla,Jj&xn. {Cardita), Ltam. 24; Deless. 

 pi. ll.'f. 11. 

 Hab. Kino-0-Sima, in Madrepores. 



XXXII. — Note on the Varieties of Hogs. 

 By Dr. J. E. Gray. 



The variations of domestic dogs is a subject that has not 

 been sufficiently studied, and one that is -well worthy of atten- 

 tion. 



Colonel Charles Hamilton Smith devoted tlie fifth volume 

 of Jardine's ' Naturalist's Library,' to the natural liistory 

 of dogs. lie divides domestic dogs thus: — 1, feral dogs; 



