S.A. Miller—Glyptocrinus and Reteoerinus. 111 
concave ridges on the basals below and two uniting with sim- 
ilar ridges on the primary radials above. The subradial on the 
azygous side bears a fifth or additional ridge extending up- 
ward from the middle of the concave side of the upper bifur- 
eating ridges to the superior truncated side or middle of the 
azygous interradius. The depressions between these plates or 
the height of these ridges is 2 of a line. 
Nealii.—Primary radials three in each series, except in 
the left posterior ray, which has only two. These plates are 
slightly longer than wide, the first and third, or in the left pos- 
terior ray the first and second, are pentagonal and of* almost 
pr 
free, and scarcely differ from the free arm — the second 
third an axillary 
is soldered in with the interradials to the top of the body 
s. 
. stellaris.—Secondary radials, four to six in each series 
very gradually diminishing in size, without any evidence of a 
lateral division from either plate. 
- Nealli.—Azy gous interradial area covered by fifty or sixty 
Plates, very unequal in size, the middle row being decidedly 
arger and more prominent than the others, so as to forma 
ridge up the middle, while the other smaller and less prominent 
vault and with which they unite. 
A. stellaris.—Azygous interradial area covered by a large 
number of plates, probably one hundred or more, very unequal 
in size, the middle row being decidedly larger and more prom- 
