60 



OPIIIOLEPIS CINCTA. 



same species ; they present no structural variation, except that some- 

 times there are three instead of two large scales, in a straight line, 

 between the radial shields ; the largest specimens have the disk to the 

 arms, as 21 : 58. The supplementary arm-plate pieces are sometimes 

 cut in two. Drawings belonging to Professor Agassiz show that the 

 living animals (from Charleston) vary in color; in one, the upper sur- 

 foce of the disk is Vandyke brown, the central primary plate being 

 light yellow, and the other primary plates surrounded by specks of 

 white or of brown ; the upper arm-plates are like the disk, and bear 

 specks of white ; the side arm-plates yellow ; in another, there is a 

 large, oblong, light-yellow spot in the middle of the disk, and a smaller 

 round spot in each interbrachial space, all these being limited by black 

 dots ; the rest of the disk is mottled Avith brownish and greenish gray, 

 and some black dots ; the side arm-plates are light yellow, and the 

 upper arm-plates lighter or darker greenish-gray, making bands. Occa- 

 sionally one or two of the lower teeth are split in two. 



This species is distinguished by its regular back plates, and numerous 

 arm-spines. 



LIST OF SPECIMENS. 



Catalogue 

 Number. 



Original Number 

 Number.! of Spec. 



Locality. 



When 

 Collected. 



Whence obtained. 



Nature of 

 Specimen. 



208 

 209 

 210 



Museum of Comparative Zoology. 



Florida. 



Charleston, S. C. 

 Charleston, S. C. 



G. Wurdeman. 

 Prof. Agassiz. 

 Prof. F. S. Holmes. 



Alcoholic. 

 Dried. 



OphiolepiS Cincta Mull. & Trosch. 



OpMolcpis cincta Mull. & Troscii. System der Asteriden, p. 90. 

 Ophiolepis cincta Lutken. Addit. ad Hist. Oph. 



LIST OF SPECIMENS. 



