Dr. H. Woodward—Turrilepas in Canada. 273 
forms of plates are known, these are arranged in linear series of 
similar plates, each series being strongly imbricate from below 
upwards, and so disposed that the edges of the contiguous series are 
alternate in position, and partially cover one another laterally. 
In the Supplement to vol. i. of Barrande’s great work “Systeme 
Silurien du Centre de la Bohéme,” part i. 1872, p. 565, the author 
describes a similar form under the generic name Plumulites, of which 
he records ten species, based on detached plates from beds in various 
localities in Bohemia, from D 1=Lingula Flags, to EH 2=Wenlock 
Limestone. 
Several of these plates closely resemble those from the Wenlock 
Limestone of Dudley ; the others, whilst agreeing in their orna- 
mentation, have the apex of the plates obtuse, and the ornamental lines 
near the summit circular and fenestrated. These may possibly have 
been terminal or opercular plates, the more pointed forms being the 
peduncular plates (see Q. J. G. 5. 1865, p. 488). 
In their “‘ Monograph of the Silurian Fossils of the Girvan District 
in Ayrshire,” etc., H. A. Nicholson, and Robert Etheridge, jun. 
(vol. i. 1880, fase. ii. pl. xiv. fies. 22-27, pp. 2138-215, and fase. 
iii. pp. 299-802, pl. xx. figs. 8-10) describe two new species of 
Turrilepas, namely, 7. Peachii, Hth. and Nich., and Z. Scotica, Rh. 
E., jun., from the Silurian of Girvan, Ayrshire. 
In their observations on Turrilepas one of these authors writes 
(p. 218) as follows:—“ The genus Turrilepas was established by 
Dr. H. Woodward for certain peculiar ovate-triangular plates from 
the Dudley Limestone, previously known under the name of Chiton 
Wrightianus, de Koninck. Dr. Woodward satisfactorily showed that 
these plates were more properly referable to a form of Cirripede 
allied to Loricula (and for which he proposed the name Turrilepas) 
than to Chiton, or to any other Mollusc. 
“Priority is claimed by M. Barrande for his term (Plumulites) on 
the plea of previous publication. For my own part, I hardly think 
the facts support M. Barrande’s claim. Dr. Woodward’s name was 
both proposed and published in 1865; and although the genus was 
certainly not defined in so many words, it was nevertheless founded 
on a well-known and perfectly defined fossil, and, what is more, was 
copiously illustrated. I take this to be satisfactory publication. it 
appears that M. Barrande had discovered similar plates in the 
Silurian rocks of Bohemia, and applied to them the name Plumulites, 
—a fact which was communicated (orally) by Prof. Reuss to the 
Imperial Academy of Science of Vienna, 18th February, 1864, and 
the name was published in a paper of the latter,’ but unaccompanied 
either by description or figure. So far as I understand the question, 
no description or figure was furnished by Barrande until the appear- 
ance in 1872 of the supplement to the first volume of his magnificent 
work on the Silurian System of Bohemia (already quoted). 
“T think, under these circumstances, that strict impartiality 
requires the adoption of Dr. Woodward’s name Turrilepas. Again, 
Messrs. Hall and Whitfield adopt Plumulites in preference to 
| Sitz. Berichte d. k. k. Akad, Wissensch. vol. xlix. p. 219. 
DECADE IlI.— VOL. VI.—NO. VI. 18 
