Dr. H. Woodward—On some remarkable Cystideans. 201 
regards the zoological position in which they should be placed. 
Professors James Hall, De Koninck, and myself have had the good 
fortune to see and study more perfect specimens than those which 
were placed in the hands of Messrs. Meek and Billings, but it is all 
the greater honour to these latter savans that they rightly interpreted 
the fragmentary remains which came under their notice for description. 
I am the last person who would insist merely upon the dictum of 
recognized scientific authority, and I beg to assure Prof. Wetherby 
(whom I have not the pleasure personally to know) that I have no 
desire to detract from his work by any word of mine; but I may 
be permitted to suggest that hasty publication, with a view to 
obtaining “priority,” may have caused him in this instance to 
overlook the importance of first becoming thoroughly acquainted 
with the subject before him. None but those who have to spend 
their lives in scientific research know the piles of “chaff” which 
every careful worker has to winnow away before he can arrive at 
the substratum of really good “ grain” beneath. 
If Prof. Wetherby desires his work to stand, he must be prepared 
not only to hunt up carefully the bibliography of his subject, but also 
to understand more thoroughly the class characters of these difficult 
Paleozoic forms before attempting, on very imperfect materials, 
to correct older and more experienced labourers in paleontology. 
EXPLANATION OF PLATE VI. 
Ateleocystites, Billings (1858),=Anomalocystites, Hall (1859). 
Fic. 1. Ateleocystites Huxleyi, Billings, Trenton Limestone, U. Silurian, Hull, 
near Ottawa, Canada. (Copied from E. Billings’ woodcut, p. 
78, Decade iii. Geol. Surv. Canada, 1858.) 
2 and 3. Ateleocystites (Anomalocystites) disparilis, Hall, 1859, Oriskany 
Sandstone, U. Silurian, Cumberland, Maryland, U.S.A. 
2. Anterior, concave side. Fig. 3. Posterior, convex side (after Hall’s Paleeon- 
tology, New York, 1859, p. 144, pl. Ixxxviii. figs. 1 and 2). 
4 and 5. Ateleocystites (Anomalocystites) cornutus, Hall, 1859, Pentamerus 
Limestone, L. Helderberg group, U. Silurian, Litchfield, 
Herkimer Co., U.S.A. 
4. Anterior, concave side. Fig. 5. Posterior, convex side (after Hall’s Palzon- 
tology, New York, 1859, p. 133, pl. vila. figs. 5 and 6). 
6, 7, 8. Ateleocystites (Anomalocystites) balanoides, Meek, 1878, Cincinnati 
group, Lower Silurian, Cincinnati, Ohio, U.S.A. 
», 6. Anterior, concave side. Fig. 8. Posterior, convex side (after Meek’s Geol. 
Surv. Ohio, 1873, pl. 3 bis, figs. 6a.d.c.). 
9-15. Ditto (Enoplowra balanoides), Wetherby, 1879, Journ. Cincinnati Soc. 
Nat. Hist. vol. ii. No. 4, p. 162, pl. 7, figs. 1, and la-g. 
9, 11,* 18, 15. Posterior, convex side. Fig, 10, 12, 14. Anterior, concave side. 
Loc. Cincinnati, Ohio. 
16-21. Ateleocystites (Placocystites) Forbesianus, De Koninck, 1870, Wenlock 
Limestone, U. Silurian, Dudley. 
16. Posterior, convex side. Fig. 17-21. Anterior, concave sides. Fig. 18t. 
tentacle. 
Figs. 16-21 are drawn from the original specimens preserved in the British Museum 
(all natural size). 
*[Is it possible that the associated plates a. fig. 11, which Prof. Wetherby considers 
to be ‘‘ abdominal appendages,”’ are the plates of Twrrilepas ? If this were the case, 
and their association not merely fortuitous, it might prove, not that A¢eleocystites 
was a Crustacean, but that Twrrilepas was possibly the peduncle of this anomalous 
Cystidean! We commend this point to Prof. Wetherby’s consideration. ] 
