APIOCRINITES. 
11^ 
formed by numerous irregular columnar joints, 
sending off fibres for adhesion to other bodies.” 
The difterent parts of this animal were first 
described by Mr. Parkinson, under the various 
names of bottle, straight, and stag’s horn encrinite ; 
and have since been accurately investigated by 
Mr. Miller, who considers them as belonging but 
to one species, which he has placed in his first 
division of the Crinoidea ; in the same genus with 
the celebrated Pear encrinite of Bradford. 
The column of this species consists of smooth 
ossicula, somewhat enlarging in the middle ; their 
articulating surfaces being elliptical, finely granu- 
lated, and having two narrow transverse ridges, in 
the centre of which is the small perforation sup- 
posed by Mr. Miller to contain the alimentary 
canal. 
The pelvis, or body, is of a tumid utricular form, 
and is divided into separate ossicula of various 
shapes, to which the names of ribs, clavicles, and 
scapulae, &c. have been applied by the authors 
above named. 
Of the pentacrinites we have part of the ver- 
tebral column, consisting of eleven thin penta- 
gonal vertebrae, with markings on their articulating 
surfaces, similar to those of the Pentacriniis 
Caput Medusce : some ossicula have also been 
found of a quadrangular form, having the angles 
rounded, and tlie surface ornamented with figures 
resembling a floret of four rays, like the entro- 
chite. No. II70. of Lhwyd. Trochitm of four 
rays are very rare ; Mr. Parkinson mentions that 
he liad seen but one (fig. Tab. xiii. Vol. ii. 
