520 Mr. P. 11. Lowe — Observations 



that in tlieir geological characters they are quite distinct 

 from the volcanic islands of Dominica and Guadeloupe. 



I am doubtful of the status of the only specimen I have 

 seen from Eustatius^ but it appears to be referable to C. bar- 

 tolemica, and is not like examples from St. Kitts and 

 Moutserrat, Avhich agree with those from Dominica. 



Regarded in the light of the geological characters of these 

 more northern Lesser Antillean Islands and in relation to 

 the submarine contours which surroimd them {cf. more 

 especialh'' papers by Spencer, Trans. Can. Instit. vol. vii. 

 Dec. 1901), the study of the distribution of C. bartulemica 

 jind its subspecies C. bartolemica dominie ana possesses 

 considerable points of interest. A study of the distribution 

 of the land-mollusca in these islands is also interesting in 

 this connection {cf. Bland, Proc. Amer. Phil. Soc. Philad. 

 vol. xii. p. 56^ 1871). 



CCEREBA BARTOLEMICA DOMIXICAXA. 



Certhiola dornincana Taylor, Ibis, 1864, p. 167 (Dominica ; 

 Coll. P. L. Sclater) ; Sclater, Cat. Birds Brit. Mus. vol. xi. 

 p. 44 [Hub. Dominica, ^Moutserrat, Antigua, and Barbuda). 



Coereba barthoJemica Cory, Cat. "W.I. Birds, 189.2, p. 116 

 (St. Christopher, Nevis, Barbuda, Antigua, Guadeloupe, 

 Dominica) . 



Careba dominicuna Ridgw. Birds N. & M. Amer. pt. ii. 

 1902, p. 417 (Islands of Dominica, Guadeloupe, Nevis, Bar- 

 buda, and Antigua ; also Anguilla, Marie Galente, Desirade, 

 St. Christopher, and Moutserrat). 



25 <J c? & ? ? • Coll. Brit. iMus. 



12 ditto. Coll. Rothschild. 



4 ditto. Coll. P. R. L. 



Hab. Islands of Dominica, Guadeloupe (? Grande Terre, 

 ? Marie Galante, ? Desirade, ? Petite Terre), Moutserrat, 

 Nevis, St. Christopher, and ? Eustatius (Lesser Antilles). 



Nineteen specimens from Dominica (including the type of 

 C. dominicana) and others from the islands of Moutserrat 

 and St. Christopher differ from examples from the Lesser 

 Antillean islands further north in being darker and richer in 



