Zuuiugical Society. 3(51 



style and character of its sculpture, that a specimen or two of differ- 

 ent ages seem all that is necessary to exhibit a complete specific 

 connection between them ; it has however been demonstrated by the 

 researches of two gentlemen of perhaps the greatest practical expe- 

 rience, Mr. Cuming and Mr. Hinds, that no species of shell common 

 to the western coast of South America has ever been discovered on 

 the coast of Africa, 



Uanella ponderosa. Ran. testa acuminato-ovatd, crassd, pon- 

 derosri, varicibus valde promine/itibus ; anfractibus .luperne leviter 

 angulatis, granulorum seriebtis cinyulatis, ulternis yrunulis gran- 

 dibus, bipartitis ; rubido-fuscd, luteactnte ; columella yranulcitd et 

 rugosd ; caiiali brevi, subrecurvo ; labro plano-incrassato, granU' 

 Into, superne siiiuato. 

 Conch. Icon., Ranella, pi. 3. f. 14. 



JHab. } 



The sculpture of this shell approaches very- nearly to that of the 

 Ranella ccelata ; it only requires however a slight examination of the 

 specimens before rae in diifcrent stages of growth, to see that they 

 are specifically distinct. 



Ranella nob-ilis. Ran. testd oblongo-ovatd, depressd, crassius- 

 culd ; spird acuminata, varicibus angustis, rudiatim stellutis ; an- 

 fractihus granuloso-liratis, pracipue super varices, in medio tuber- 

 culatis, anfractu ultimo tuberculorum scriebus duabus armato ; 

 albidd , fuscescente subtiliter maculosd ; columelld fortiter rugosd; 

 apertvrd oblongd, utrinque canaliculatd, faucc ulbii ; lubro fortiter 

 rugoso. 

 Conch. Icon., Ranella, pi. 4. f. 16. 



Hub. ? 



The form of this noble species is somewhat intermediate between 

 that of the Ranella pulchra, or " Finned Frog," and the ordinary type 

 of the genus, the varices exhibiting an indication of that peculiar 

 star-like radiation common to the former, whilst the aperture is of 

 an oblong canaliculated form, with the wrinkled hp and columella 

 of the latter. The sculpture most resembles that of the Ranella J o- 

 liata . 



Ranella coriacka. Ran. testa oblongo-ovatd, depressiusculd, 

 spird subobtusd, varicibus rotundalis ; anfractious uiidique creber- 

 rime granulatis, transversini costatis,costis latis, i/iterdvm .tubobso- 

 letis, irreyularitfr tumido-nodosis ; uurantio-fuscescente ; columelld 

 sparsim rugosd; aperturd ovatd, utrinque leviter sinuatd ; labro 

 intus radiatim denticulato. 

 Conch. Icon., Ranella, pi. 6. f. 26. 



Hab. ? 



This interesting species, which Mr. Cuming possesses in different 

 stages of growth, is the shell figured by Mr. G. B. Sowerby, jun., in 

 the ' Conchological Illustrations ' as a variety of his Ranella scrobi- 

 culator {Triton scrobiculutor, Lamarck and others) ; I think, how- 

 ever, with M. Deshayes, that it is " une coqnille qui me paralt tou- 

 Jours di^erente ; fen ai vu phtsieurs exemplaires et plusieurs figures, 

 Ann. ^ Mag. N. Hist. Vol. xv. 2 C 



