SS8 
SHELLS. 
[Chap. XI, 
the less attractive ones of the land and the lakes. 
Hence Mr. Hanley finds it necessary to premise that 
the list appended, although the result of infinite labour 
and research, is less satisfactory than could have been 
wished. " It is offered," he says, " with diffidence, not 
pretending to the merit of completeness as a shell-fauna 
of the island, but rather as a form, which the zeal of 
other collectors may hereafter elaborate and fill up." 
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 
Rissose, Chemnitziae, 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. 
List of Ceylon Shells. 
The arrangement here adopted is a modified Lamarck- 
ian one, very similar to that used by Eeeve and Sowerby, 
and by Mr. Hanley, in his Illustrated Catalogue of 
Recent Shells. 1 
1 Below will be found' a general Zeitsch. Malakos. 1853. p Anton, 
reference to the Works or Papers in Wiegm. Arch. Nat. 1837; Ver- 
which are given descriptive notices zeic'hn. Conch. Beck in Pfeiffer, 
of the shells contained in the fol- Symbol. Relic. Benson, Ann. Nat. 
lowing list ; the names of the Hist. vii. 1851; xii. 1853; xviii. 
authors (in full or abbreviated) 1856. Blainvuxe, Diet. Sc. Nat. ; 
being, as usual, annexed to each Nouv. Ann. Mus. His. Nat. i. 
species. < Bolten, Mus. Born, Test. Mus. 
Adams, Proceed. Zool. Soc. 1853, Ccees. Find. Bbodeeip, Zool. 
54, 56 ; Thesaur. Conch. Albebs, Journ. i. iii. Bbtcuiebe, Encyc. 
