Dr. H. Woodward—On some remarkable Cystideans. 197 
same kind in all, and differs in aspect from that of any other Cysti- 
dean genus known. It is so peculiar that it appears to be near a sort 
of a group character, so to speak, like the scale-markings of some of 
the Crustacea.!_ These points of agreement are of such a nature that, 
although none of the species have been as yet described on good 
specimens, they seem quite sufficient to prove that they are congeneric. 
‘«« Montreal, 1871. E. Briuines.” 
We subjoin figures of the anterior and posterior surfaces of this 
remarkable Cystidean, for the elucidation of which we now possess a 
very fine series of specimens, many of which have been collected by 
C. Ketley, Esq. The original of Fig. 1 was obtained by J. Gray, 
Esq. (All the above specimens are in the British Museum, and were 
obtained from the Wenlock Limestone, Wren’s Nest, Dudley.) 
Ateleocystites (Placocystites) Forbesianus, De Kon. sp. 
Fie. 1. Posterior or convex side, showing the “anal plate’ (a), and the ovarian 
plate (4), the base of the tentacles (¢, ¢), and the point of attachment for 
the column (s). 
», 2. Anterior or concave side showing the tentacles (¢, ft). 
», 3. View of the lower extremity of the body, showing the surface for the 
attachment of the column (s). 
», 4. View of the top of the body, showing the points of attachment for the arms 
or tentacles (¢, 2). 
», 5. Portion of the column near the body: drawn from specimens having a 
portion of the column still remaining attached. 
», 6. a, 6,¢c. Three views of a small tapering column found detached, but having 
the same characteristic sculpture visible upon its joints observed in 
Ateleocystites. Probably the lower extremity of the column. 
» 7. One of the arms, or tentacles, drawn from a specimen, having the arms still 
attached to the body. 
No other form belonging to this anomalous group was recorded, 
until Mr. F. B. Meek described and figured in the Geological Survey 
of Ohio, 18783 (p. 41, pl. 3 bis, figs. 6, a, b, c), the fragmentary 
remains of a new species, evidently closely related to Ateleocystites 
Hualeyi, under the name of Anomalocystites ( Ateleocystites ?) balanoides, 
Meek, the description of which we subjoin :— 
[1 * Compare the ornamentation of -Ate/eocystites with the plates of Turrilepas 
Wrightii, also from the Wenlock Shale and Limestone, Dudley [figured and described 
by H. Woodward, in the Quart. Journ. Geol. Soc. 1865, vol. xxi. pl. xiv. figs. la 
to 17. See also Grou. Mac. Vol. II. 1865, p. 470 (Woodcut)]. Can it be possible 
that any actual relationship exists between these two remarkable and aberrant 
forms >—H.W.” (Grou. Maa. 1871, Vol. VIII. p. 72.)] 
