﻿CALYMENE. 



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Subspecies I. 



Calymene senakia, Conrad. PL IX, fig. 5 — 11. 



C. Blumenbachii, Green, in part, No. 1 cast, 1832. 



C. senaria, Conrad. Ann. Geol. Rep., N. Y., p. 49, 1841. 



— Hall. Palaeont. N. York, vol. i, pi. lxiv, fig. 3, 1847. 



— Emmons. Geol. Rep., p. 390, fig. 2, 1842. 



C. brevicapitata, Portlock. Geol. Report, pi. iii, fig. 3 only?, 1843. 



— Salter. Mem. Geol. Surv., vol. ii, pt. 1, pi. xi, figs. 1, 2, 1848. 



— „ „ vol. iii, pi. 17, figs. 10— 12 (not fig. 9). 1865. 



— „ Morris Catal., 2nd ed., p. 102, 1854. 



— M'Coy. Pal. Foss. Woodw. Mus. 165, tab. i f, figs. 4—6, 1855. 

 C. Baylet, Id. Op. cit., tab. i f, fig. 8 (not of Barrande). 



C. forcipata, 7c?. Sil. foss. Ireland, pi. iv, fig. 14 (head only), 1846. 



C. modica vix biuncialis, elongata, alutacea ; glabella brevi trigond, trituberculosd, lobis 

 rotundis. Gena convexa, absque processu oculari, oculis submedianis. Frons producta 

 recurva, longitudinc tertiam partem glabella; aquans. Thorax axe convexo, pleuris valde 

 deJlexis,fulcro approximato. Cauda trigona, axe lato conico ; lateribus deflexis 5-costatis, 

 — costis furcatis. 



Under the name brevicapitata of Portlock have been commonly included two marked 

 Caradoc varieties or subspecies, in one of which the glabella, though nearly resembling 

 that of the ordinary form, is narrowed in front, and has a smaller proportion as compared 

 with the cheeks. This I have already distinguished in the previous page by the varietal 

 name, C. Caractaci. It is, in truth, not far removed from the Dudley variety. The 

 other there will be much less hesitation in admitting as a distinct species. It has so 

 short a glabella as to have suggested the specific name to Gen. Portlock, and so cylindri- 

 cal a form as to have formerly induced me to rank with it C.parvula, Barrande, a truly 

 distinct fossil. And by the convexity of the form, and the breadth of the axis, it is dis- 

 tinct enough from our next variety or subspecies, while the finely granular surface easily 

 distinguishes it from the "Dudley fossil." 



C. senaria is a rather small species, the fragments seldom indicating a size of 

 more than two inches in length. It is elongate-oval and very convex, the width of the 

 head being less than half the whole length, of which the head itself occupies two-sevenths. 

 It is semicircular, with the front produced and elevated; and the triangular glabella is 

 fully as wide at the base as the whole length from the neck-furrow to the front margin : it 

 is also as wide as the cheeks in their full measure. The lobes are rounded, and all three 

 quite distinct, the basal ones not so wide as the central portion of the glabella. The axal 

 furrows deep, but not broad ; and in the cast the attachment for the ascending processes 

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