144 



comparison, I have generally found the description of Dr. Baird the 

 most accurate and trustworthy. 



To facilitate this object, I have added a list of the species, the 

 skulls of which have been figured. 



Fam. MolgidjE. 



Molge striata, Gray, Cat. Batr. p. 31. t. 3. f. 1 1 1 ; Schlegel, 

 Fauna Japon. t. 5. f. 9, 10. 



Fam. Plethodontid^e. 



Onychodactylus japonicus, Gray, Cat. Batr. p. 33. t. 3. f. 1 ; 

 Fauna Japon. t. 3. f. 6. 



Ambyostoma opacum, Dum. et Bibr. E. Gen. ix. t. 10. f. 6. 



Plethodon glutinosum, Tschudi, Batr. t. 2. f. 4. 



Desmognathus ftjscus. 



Plethodonfuscum, Dum. et Bibr. Erp. Ge'n. t. 101. f. 3. B.M. 



Spelerpes rubra (skull, fig. 3). 



" Bolitoglossa rubra, Cab. B.M." from Paris. 



Geotriton fuscus, sp., Dum. et Bibr. E. G. ix. 1 12. t. 102. f. 1 . 



GSdipus variegatus. 



Bolitoglossa mexicana, Dum. et Bibr. Erp. Gen. ix. p. 3. t.101. f. 4. 



Ensatina Eschscholtzia, Esch. Zool. Atlas, t. 22. 



G. On the Power of Dissolving Shells possessed by the 

 Bernard Crab (Pagurus). By Dr. J. E. Gray, F.R.S., 

 V.P.Z.S., Pres. Ent. Soc, etc. 



In a note to my paper "On the Formation and Structure of 

 Shells," in the 'Philosophical Transactions' for 1833, I stated it is 

 probable that some Bernard Crabs have also the faculty of dissol- 

 ving shells, for it is not unusual to find the long fusiform shells 

 (such as Fusus fasciolanus and turbinella) which are inhabited by 

 these animals, with the inner lip and great part of the pillar on the 

 inside of the mouth destroyed, so as to render the aperture much 

 larger than usual. 



Having continued my observations on these shells, I am convinced 

 that certain species of Bernard Crab {Pagurus) have the power, some 

 possessing it to a much greater degree than others. 



Lieut. Burnaby lately brought a number of Crustacea to the 

 British Museum from the South Seas ; amongst which there were 



