93 



Hab. San Nicolas, island of Zebu, Philippines (found in sandy 

 mud at the depth of six fathoms) ; Cuming. 



This species exhibits a greater disparity in the sculpture of the 

 valves than any other, the strize of the right valve being very fine and 

 close-set, whilst those of the left are almost keel-like and compara- 

 tively distant. 



5. Myadora tincta. Myad. testd trigond, antick suhtruncatd, 

 usque marginėm concentrich striatd, striis elevatis, prominentibus ; 

 fuscescente tinctd. 



Conch. Iconica, Myadora, pi. 1. f. 5. 



Hab. Island of Ticao, Philippines (found in coral sand at the depth 

 of six fathoms) ; Cuming. 



The Myadora tincta scarcely diiFers from the Myadora planą, ex- 

 cept in being of a less oblong and more triang\ilar form. 



6. Myadora striata, Gray, MSS. British Museum; Pandora 

 striata, Deshayes. 



Conch. Iconica, Myadora, pi. 1. f. 6. a, b, and c. 

 Hab. Port Nicholson, New Zealand ; Swainson. 

 This is the grand type of the genus, and of much larger size than 

 any other species. 



7. Myadora brevis. Anatina brevis, Stutchbury, Zool. Journ. 

 * vol. v. p. 99 ; Tab. Supp. xliii. f. 1 and 2. 



Conch. Iconica, Myadora, pi. 1. f. 7, 



This is a very interesting form, and the striae of the left valve are 

 peculiarly ■wrinkled. 



8 Myadora oblonga. Myad. testd trigono-oblonga, antice latis^ 

 sime trmcatd, concentrice striatd, striis elevatis, regularibus.prope 

 marginėm anticam angulatis. 



Conch. Iconica, Myadora, pi. 1 . f . 8. 

 Hab. Island of Mindoro, Philippines ; Cuming. 

 ITie anterior side of this species is the most broadly truncated of 

 any. 



9 Myadora CURVATA. Myad. testd curvato-oblongd.valvd dextrd 

 convexiusculd, antice subindistincie flemoso-costatd, concentrice. 

 striatd, striis elevatis, angustis, regularibus. 



Conch. Iconica, Myadora, pi. 1. f. 9. 



Hab. Island of Corrigidor, Philippines ; Cuming. 



This species differs also in form rather than in variety of sculpture. 



10 Myadora Pandor^formis. Anatina Pandorąformis, Stutch- 

 bury, Zool. Journ. vol. v. p. 99 ; Tab. Supp. xlm. f. 3 and 4. 



Conch. Iconica, Myadora, pi. 1. f. 10. 



The Myadora striata, brevis, and Pandoraformis a.re the only spe- 

 cies of the genus at present known to have the clavicle. 



The Secretary called the attention of the Meeting to a specimen 

 of the Two-toed Sloth, Bradypus diductylus, which was now m the 

 Gardens, and reąuested Mr. BaU, Secretary to the Royal Zoological 



