18 Cincinnati Society of Nafjtral Jlistory. 



Dendkockixus (?) CUKTUS, 11. sp. (Plate VII., tig. li.) 



[Ety.— Curium, short.] 



Bod}- ti-iiiiciito-obconie, short. Basal i)iec-es very short, more than 

 twice as wide as high. Sub radial pieces raoderatel_y large, rather ob- 

 scurely hexagonal, with a width eqnal to one and a iialf times the 

 length. First radial pieces, in the three rays exposed, a little larger 

 than the sub-radials, about as long as wide, and pentagonal. Right 

 posterior ray with the second piece a little larger than those of the 

 other rays, about as large as the sub-radials, ueai'ly as long as wide, 

 sub-pentagonal in outline, with the two superior sides sloping, so as to 

 give the appearance of an axillary piece, but the right, shorter slope 

 merelj' supports the first anal piece ; while from the left continue the 

 succeeding true radials, of which there are six, somewhat shorter, 

 smaller pieces in direct succession, the sixth one being axillary, and 

 1 .ipporting the first divisions of the arm. In the ray immediatel}- to 

 the right of the one just described, there are ten pieces (counting the 

 first radial) in direct vertical succession, which, above the first radial, 

 have a width that is nearly ecpial to twice the length : the tenth piece 

 appears to have been an axillary, but this can not be satisfactorilj- 

 determined, on account of the imperfect condition of the specimen at 

 that point. 



The left posterior ray presents six i)ieces, between the first bifurca- 

 tion and the first radial, that are shorter than in the other rays. Arms 

 moderately long and rather stout, acutely rounded on the dorsal side5 

 and concave on the inner side, giving off, alternatel}", on opposite sides' 

 at rather distant interv^als above the first bifurcation in eacli ra}', from 

 four to five, or more, scarcelj^ diverging divisions, that are about half 

 as stout as the main ai-m from which they spring, and composed of 

 pieces that are about as wide as long, and prominent at the superior 

 lateral angles ; these armlets remain simple throughout ; the first bi- 

 furcation of the rays is in all respects similar to the succeeding ones. 



Azj'gos inter-radials or anal series, consisting of a direct vertical 

 lange of pieces, that are longer than wide, not so wide as the primary 

 radials, ver}' convex on the outer side, and rise from the right superior 

 sloping side of the second radial uf the right posterior ray, so as to 

 ])resent much the a|)pearancc of a branch of this ra^- ; ventral prolon 

 gation and its connection with the anal series not observed. 



Column large, round, nearly' smooth, increasing very slightly in size 

 downward, and composed of nearly equal, thin joints ; the disks have 

 a small, central and (.-ircular perforation, ladiating from which there are 

 fine strijti. 



