243] W. P. Woodring 45 



Moore 2 submitted a brief report on the mollusca. The first 

 systematic account of the fauna was published in 1866 by 

 the late Mr. E. J. Lechmere Guppy, 3 who later made several 

 additional contributions. 4 Mr. Eobert Etheridge 5 in an ap- 

 pendix to the report of the Jamaican Survey, published in 

 1869,, discussed the general aspect of the fauna. In 1896 

 Guppy and Ball 6 issued descriptions of a number of new 

 species. The report of Mr. Eobert T. Hill 7 on his recon- 

 naissance of Jamaica contained a brief notice of the mollus- 

 can elements of the fauna. In the Wagner Institute Papers 

 Dr. Dall 8 described many new species and noted the occur- 

 ence of previously described forms; in addition, the last 

 fascicle contained a discussion of the correlation of the fauna 

 and a check-list. 9 



2. BIOLOGICAL CHARACTER OF THE FAUNA 



The present study has resulted in the recognition of be- 

 tween 190 and 200 species of pelecypods, of which almost 

 half are new. These are segregated into 64 genera and 40 

 families. The superspecific groups and the number of 

 species in each group are given in the following list: 



2 Moore, C. T., Quart. Jour. Geol. 800., London, vol. 19, pp. 510-513, 

 1863. 



3 Guppy, R. J. L., Quart. Jour. Geol. Soc., London, vol. 22, pp. 281- 

 295, 1866. 



4 Guppy, R. J. L., Geol. Mag., decade v, vol. 4, pp. 496-501, 1867: 

 idem, decade 2, vol. 1, pp. 404-411; 436-446, 1874; idem, vol. 2, pp. 

 41-42, 1875; Proc. Assoc. Trinidad. 



5 Etheridge, R., Reports on the Geology of Jamaica, Part 2, West 

 Indian Survey, Mem. Geol. Survey Great Britain, ap. 5, pp. 319-329, 

 1869. 



6 Guppy, R. J. L., and Dall, W. H., Proc. U. S. Nat. Mus., vol. 19, 

 no. 1110, pp. 303-331, 1896. 



7 Hill, R. T., Bull. Mus. Compt. ZooL, Harvard, vol. 34 (geol. ser. 

 4), pp. 145-152, 1899. 



8 Dall, W. H., Trans. Wagner Free Inst. fifci., Philadelphia, vol. 3, 

 pts. 1-6, 1890-1903. 



9 Idem., pt. 6, pp. 1580-1588, 1903. 



