134 GEOLOGY OF TH£ WEST INDIES. [Nor; 



posite to the pectoral fins, and, by tapering regularly 

 thence to the caudal fin, the tail becomes proportionally 

 narrower than in the preceding species of this division; co- 

 lour of the body above, a reddish yellow, deeper on the 

 back, abdomen yellowish white; caudal Jin greenish blue; 

 the rest of the ^/z^ reddish yellow; eyes large, irides brown, 

 the pupil encircled with yellow; body \vith thirteen or 

 fourteen black transverse bands. The caudal Jin of this 

 species is but slightly rounded: it is of a medium form 

 between that of the diaphana and that of the ornata. In- 

 habits the salt marshes near Newport, Rhodeisland. 

 P. 18.— D. 12.— V. 6.— A. 10.— C. 161 rays. 



NOTE. 



Subsequently to the publishing' of my paper on the genus Catostomus, the 

 fourth volume of the Memoires de VAcadSmie Imperiale des Sciences de Sl 

 Petersbourg was put into my hands. In this volume there is a good figure, 

 with details, of a fish discovered at Kamschatka; accompanied with a minute 

 description, in Latin, by the learned Dr. Tilesius, who accompanied the Rus- 

 sian commander Krusenstern, in his voyage round the world, (p. 457, plan. 15, 

 fig. 1.) This fish, named by the above mentioned author Cyprinus i^ostratue, 

 is a true Catostomus, and must be classed as such, if the nomenclators should 

 think proper to adopt my genus in their systems. 



Observations on the Geology of the West India Islands, 

 from Barbadoes to Santa Cruz, inclusive* By JVil^ 

 Ham Maclure. Read Oct. 28, 1817. 



This range of islands may, in a geological point of 

 view, be divided into two distinct parts, one of which, 

 occupying the eastern side, consists of a stratification of 

 transition rocks, partially crowned by secondary, and 

 embraces the islands of Barbadoes, Mariegalante, Grand- 

 tcrre in Guadaloupe, Deseada, Antigua, St. Bartholo- 



