AMPIIIURA CIIIA.III. 



119 



Variations. — A small specimen had a disk of 4""°-, and arms of 

 2^-inm. . ^jj^j primary plates were very large, rounded, and distinet ; 

 the upper arm-})l;ites were proportionately longer and more angular 

 than in the adult ; there were lour arm-spines, which were more taper- 

 ing than in larger specimens. Sometimes the inner angle of the uuder 

 arm-plates is nearly ol)literated. The side mouth-shields often do not 

 quite meet in the interbrachial spaces. Color of the living animal, 

 whitish. 



Taken off the coast of Greenland ; muddy bottom ; fifteen to fifty 

 fathoms (Barrett). 



The displaced middle mouth-papilla is a good distinguishing mark in 

 this species. 



LIST OF SPECIMENS. 



Amphiura Chiajii Forbes. 



Asterias Jiliforrnis Delle Chia.je (nan O. F. Mijller). IMemorie, II. p. 359. 1825. 

 Amphiura Chiajii Forbes. Linn. Trans., XIX. p. 151. 1843. 

 Amphiura Chiajii Saks. Middelhav. Lit. Fauna, II. p. 8G. 1857. 

 Amphiura Chiajii Lutken. Addit. ad Ilist. Oj)h., p. 57. 

 Ophiolepis Swukvalli Mull. & Tuosch. Syst. Astei'iden, p. 93. 



There are, at Berlin, specimens labelled Ojihioleiyis SundevaUi, ap- 

 parently in the writing of Joh. Miiller (Anat. Mus., 1G498). They 

 were sent from Norway by Professor Sars, and are plainly the same 

 as A. Chiajii. The two synonymes are contemporaneous ; but A. 

 Chiajii is here retained as the name m use among the best authors. 



