VIL. Mastigocrinus loreus. 195 
which come in the family Decadocrinide. There are two 
reasons why this was not done: first, that every one who 
has seen this species, including myself, has regarded it as a 
Cyathocrinus ; second, that, until the genera Botryocrinus and 
Cyathocrinus were understood, the reasons for separating it 
from the latter genus would hardly have been appreciated, 
Of the genus only the one species is as yet known, though 
it is probable that several American species will be found to 
belong to it. The descriptions of genus and species must 
therefore go together, and a diagnosis of the latter can hardly 
be given. 
GENERIC DIAGNOSIS. 
Cup cyathiform, with plates of medium thickness. I BB 5; 
BB5; RR5. Arms simple, dichotomous, elongate. Noh’; 
x hexagonal, in line with RR; Ventral Sac long, flattened, 
composed of primitively hexagonal plates which are trans- 
versely folded. ‘Tegminal plates small, irregular. Stem round, , 
with small pentagonal axial canal, and with radial sutures. 
The appearance of the specimens as they le on the rock, 
with their long, wavy, delicate arms outstretched, suggests a 
knout or cat-o’-nine-tails ; hence the name, from waorlé, a 
scourge. 
The type species is founded on the evidence of five speci- 
mens, viz. :— 
In the British Museum : 
57048, a magnificently preserved crown, with 86 millim. of 
stem, seen from the posterior. Matrix a blue shale. 
Dudley. From the collection of Mr. John Gray of 
Hagley. (Pl. XII. fig. 3, and zincotype, figs. 3-8, 
and fig. 9 on p. 198.) 
In the Museum of Mason College, Birmingham : ° 
133, a fairly complete crown, with 24 millim. of stem; seen 
from left side; rather disturbed and overgrown by 
Polyzoa. Matrix a rough limestone. Dudley. 
(EES fies.) 
In the Museum of the Dudley Geological Society : 
(a), a portion of a crown, with traces of ventral sac and 66 
millim. of stem; seen from anterior. Matrix a blue 
shale. Dudley. (P. 200, fig. 10.) 
(J), a smaller crown broken distally, with 8 millim, of stem, 
seen from posterior, Matrix ablueshale. Dudley. 
(Pl. XII. fig. 1, and zincotype, fig. 1.) 
