Chap. V.] 



SHELLS. 



235 



Looking at the little that has yet been done, compared 

 with the vast and almost untried field which invites 

 explorers, an assiduous collector may quadruple the 

 species hitherto described. The minute shells especially 

 may be said to be unknown ; a \'igilant examination of 

 the corals and excrescences upon the spondyh and pearl- 

 ' oysters would signally increase our knowledge of the 

 Eissoce, Chemnitzia?, and other perforating testacea, 

 wliilst the dredge from the deep water will astonish the 

 amateur by the wholly new forms it can scarcely fail to 

 display. 



Dr. Kelaart,an indefatigable observer, has recently under- 

 taken to investigate the Nudibranchiata, Inferobranchiata, 

 and Tectibranchiata ; and a recently-received report from 

 him, in the Journal of the Ceylon Branch of the Eoyal 

 Asiatic Society, m which he has described fifty-six 

 species, — thirty-three belonging to the genus Doris 

 alone — gives ample e^ddence of Avliat may be expected 

 fi'om the researches of a naturahst of his acqukements and 

 industry. 



List of Ceylon Shells. 



The arrangement here adopted is a modified Lamarckian one, 

 very similar to tiiat used by Reeve and Sowerby, and by Mk. 

 Hanlet, in his Illustrated Catalogue of Recent Shells.^ 



' Bt4ow will be found a general 

 eference to the Works or Papers in 

 ■which are given descriptive notices 

 of tlie shells contained in the follow- 

 ing list ; the names of the authors (in 

 fidl or abbreviated) being, as usual, 

 annexed to each species. 



Adams, Proceed. Zool. Soc. 1853, 

 54, 56 ; Tiiesaur. Conch. Albeks, 

 Zeitsch. Malakoz. 1853. Antok, 

 Wiegm. Arch. Nat. 1837 ; Verzeichn. 

 Conch. Beck in Pfeiffer, Si/mhol. 

 Melic. Be>'Son, A)m. Xat. Hist. vii. 

 1851 ; xii. 1853 ; xviii. 1850. Blain- 

 TiLLE, Diet. Sc. Nat. ; Nouv. Ann. 

 3Ius. Hist: Nat. i. Bolten, 3fm. 



Born, Test. Ifus. Cces. Vind. Brode- 

 Kip, Zool. Journ. i. iii. Beugxtiere, 

 Ency. 3Iethod. Vers. Carpenter, 

 Proc. Zool. Sue. 18oG. Chemnitz, 

 Conch. Cab. Chenit, Illus. Conch. 

 Deshates, Encyc. Meth. Vers. ; Mag. 

 Zool. 1831 ; Voy. Belunger ; Edit. 

 Lam. An. s. Vert. ; Proceed. Zool. 

 Soc. 1853, 54, 55. Dillwtn, Descr. 

 Cat. Shells. Dohrn, Proc. Zool. Soc. 

 1857, 58 ; Ilalak. Platter ; Land and 

 Fhuiatile Shells of Ceylon. Dfclos, 

 3Ionog. of Oliva. FABRlCirs, in 

 Pfeiffer Monog. Helic. ; in Dohni's 

 MSS. Ferussac, Hist. Mollusques. 

 FoRSKAL, Anim. Orient. Gmelin, 



