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 vigilant examination of 

 the corals and excrescences upon the spondyli and pearl- 

 oysters would signally increase our knowledge of the 

 Kissose, Chemnitzias, and other perforating testacea, 

 whilst 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, in which he has described fifty-six 

 species, thirty-three belonging to the genus Doris 

 alone, gives ample evidence of what may be expected 

 from the researches of a naturalist of his acquirements and 

 industry. 



List of Ceylon Shells. 



The arrangement here adopted is a modified Lamarckian one, 

 very similar to that used by Reeve and Sowerby, and by MK. 

 HANLEY, in his Illustrated Catalogue of Recent Shells. 1 



1 Below will be found a general | BORN, Test. Mm. Cats. Vind. BRODE- 

 reference to the Works or Papers in | RIP, Zool. Journ. i. iii. BRUGUTERE, 



which are given descriptive notices 

 of the shells contained in the follow- 

 ing list ; the names of the authors (in 

 full or abbreviated) being, as usual, 

 annexed to each species. 



ADAMS, Proceed. Zool. Soc. 1853, 

 54, 56 ; Thesaur. Conch. ALBERS, 

 Zeitsch. Matttkoz. 1853. ANTON, 



Ency. Method. Vers. CARPENTER, 

 Proc. Zool, Soc. 1856. CHEMNITZ, 

 Conch. Cab. CHENTT, Illus. Conch. 

 DESHAYES, Encyc. Mtth. Vers. ; Mag. 

 Zool. 1831; Voy. Sclanger ; Edit. 

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

 Soc. 1853, 54, 55. DILLWTN, Descr. 

 Cat. SMls. DOHRN, Proc. Zool. Soc. 



Wiegm. Arch. Nat. 1837 ; Verzeichn. i 1857, 58 ; Malak. Blatter ; Land and 

 Conch. BECK in Pfeiffer, Symbol. \ Fluviatilc Shells of Ceylon. DUCLOS, 

 Helic. BEXSON, Ann. Nat. Hist. vii. ! Monor/. of Oliva. FABRICIIJS, in 

 1851 ; xii. 1853 ; xviii. 1850. BLAIN- ! Pfeiffer Monog. Helic. ; in Dohrris 

 VILLE, Diet. Sc. Nat. ; Nouv. Ann. MSS. FERUSSAC, Hist. Molhtsques. 

 Mus. Hist. Nat. i. BOLTEN, Mm. FORSKAL, Anim. Orient. GMELIN, 



