62 BRITISH PALAXOZOIC FOSSILS. [EcninopeRMara, 
that even the imperfect fragment then known to me could not belong to the genera Lehinospherites nor 
Heliocrinites, from the large size of the plates compared with the diameter of the body, and their con- 
sequent small number. I have since examined perfect specimens from Coniston, fully bearing out my 
original view of its being a species of Caryocystites, distinguished from the C. granatwm* of the Oeland 
limestone, by the smoothness of the triangles between the five or six radiating ridges of each plate, from 
the absence of the five or six sets of intervening converging ridges which fill those triangles in that 
species. 
Position and Locality—Common in the limestone of Coniston, Lancashire; rare in the impure lime- 
stone of Yspatty Evan. 
Explanation of Figures—P\. 1. D. fig. 5. side view of specimen from Coniston, natural size.—Fig. 5 a 
front view of ditto. 
CaryocystitEs GRANATUM (Wahl.J 
Syn. and kef—Spheronites testudinarius (His. Leth. Suec. t. 25. f. 9a). 
An imperfect fragment, probably of this species, is in the collection from the limestone of Rhiwlas. 
(See observations on preceding species). 
Genus. TETRAGONIS (£ich.) 
Fichwald, in his “ Urwelt Russlands,” p. 81, has provisionally given this name to a (probably) Silurian 
fossil, having some relation, he thinks, to Zschadites (Murch.), but of an ovate form, apparently coriaceous 
texture, without distinct plates, and the surface covered with a rectangular lattice-work of thread-like, 
vertical and encircling lines. A small, but generically similar, fossil is common in the Upper Ludlow 
Rocks of Westmoreland, and has received from Mr Salter the manuscript name of feceptaculites Danbyi, 
having perhaps overlooked Eichwald’s notice. Since the explanation of our plate was printed, he requests 
me to describe and name it on my own authority, as he does not propose drawing up any description 
himself; I therefore alter the genus, but adopt the name he suggested for the species, in honour of the 
Rey. F. B. Danby. 
TEeTRAGONIS Dansyt. PI. 1. D. fig. 7 and 8. 
Sp. Ch.—Average length one inch two lines ; width near base eight lines, near opposite end five lines ; 
subovate, most tumid, and abruptly rounded towards the slightly larger, or basal end, in the middle of 
which is a small scar-like impression (? of attachment) ; slightly tapering towards the opposite end which had 
apparently a large opening; some of the vertical striz run from one end to the other, while others converge 
before reaching the base, so as to form three elliptical, obscurely defined facets ; the vertical and horizontal 
lines are about equal, but of irregular sizes; the larger as thick as fine threads, defining squares about a line in 
diameter, (rather more towards the middle and less towards the ends,) each divided by finer strive into four 
or six smaller squares or oblongs. Average length one inch two lines; width near base eight lines, near 
opposite end five lines. 
Position and Locality —tIn the green quartzites of the Upper Ludlow rock, Brigsteer, Kendal, West- 
moreland. 
Explanation of Figures—P1\. 1. D. fig. 7. Small specimen, natural size, from Brigsteer.—Fig. 7 @ portion 
of ditto, magnified four diameters.— Fig. 8. larger specimen of ditto, natural size. 
* The specimen figured t. 21, f. 4 of Memoirs of the Geological Survey as C. granatwm I do not think referrible to 
that species, but rather to represent a portion of C.Davisi ; and I am at a loss to conceive how it could be separated from 
the fig. 5 on the same plate representing avowedly the latter species. 
