Captain P. P. King on the Animals, Sfc. 91 



centrum supeme attingentes. Inter-scapulares minimse. Ambu- 

 lacra elongata, gradatim supeme latiora, ad basin prominentia. 



In general form J;his species is elliptical, or oblong ; truncated and pen- 

 tagonal at the base; \he pelvis is small and concave; the scapulars large, 

 elong-ated, decussately striated and longitudinally rugose, reaching to 

 within a short distance of the upper centre. The interscapulars are very 

 small, and the ambulacra elongated, increasing in width towards the 

 upper pai-t, and prominent at the base. 



Mr. Gilbertson observes, "the upper division of the plates" (inter- 

 scapulars) " of this Pentatrematite is very near the apex, and can 

 " scarcely be distinguished without a good magnifier; one of the top 

 " plates has been removed by accident, and will direct your attention to 

 " the division of the others." The species may, moreover, be distin- 

 guished from P. elliptica by the greater width of the ambulacra at the 

 upper than at the lower part. 



Besides the three new species described above, which will be figured in 

 the supplementary plates, Mr. Gilbertson has communicated another, 

 which appears to be an elongated variety of P. ellipticas, inasmuch as it 

 differs merely in general form from the ordinary specimens of that 

 species. 



Art. X. Extracts from a Letter addressed hij Capt. 

 Phillip Pauker King, R. N., F. R. S. and L. S.y to 

 N. A. Vigors, Esq., on the Animals of the Straits of 

 Magellan. 



[Concluded from Vol. III. p. 432.] 



38. A species of Columba. — So many species of this family have 

 lately been described, and particularly from South America, that I hesi- 

 tate in assigning this bird a new name. It is different, however, from 



