A. E. Verrilli—Marine Fauna of North America. 373 
about fourteen to eighteen small, short, round-tipped spinules 
at the summit; of these, ten to twelve are usually divergent and 
border the edge, and are a little longer and more slender than 
the four to six more rounded ones that form a central group. 
Marginal plates forty-five to forty-eight on each side; upper 
ones mostly higher than long, except toward the tips, even and 
regular, thickly covered with small spinules which are finer and 
more slender around the margins, where they are crowded and 
divergent, those over the central part being shorter, larger and 
more obtuse, with occasionally one or two, small, acute spines 
rising from the center of the plate, especially along the middle 
ofthe arm. Lower marginal plates opposite the upper and a 
little higher, covered with the same kinds of spinules, but 
mostly having a central, vertical row of two to four, slender, 
acute, spines, which are more or less appressed and scarcely 
on 
Oral S peas prominent, forming narrow gee “jaws” sur- 
rounded by two close rows of short spines, those of the inner 
row slightly divergent with enlarged rough tips, in close con- 
ct; those of the outer row shorter, with the tips flattened and 
closely prec against the inner ones, so as to support them 
externally. 
Color, in life, ight purplish red above, yellow beneath. 
ed in 1877, about thirty 
Ophiacantha sp. Related to O. cosmica (fide Lyman). 
Distinguished by having the disk thickly covered with 
Minute, three-pronged, slender spinules. Mouth-plates extend- 
ing into interbrachial spaces. Eastern slope of George’s Bank, 
220 fathoms, (schooner ‘‘ Alice G. Wonson.”) 
Astrophyton eucnemis Mull. and Troschel. 
veral specimens of this species, not before known south of 
the Gulf of St. Lawrence, were found clinging tu specimens of 
aragorgia arborea, from the eastern slope of George’s Bank, in 
about 220 fathoms, (schooner “ Alice G, Won) 
