252 F. R. Cowpcr Reed — On the Genus Conocovf/phe. 



course of the facial sutnre indicate tbat it belongs to the former 

 genus, Eidoyna. Linnarsson and Brogger' assigned it many years 

 ago to this genus. 



C. applanata (Salter, Brit. Assoc. Eep., 1865, p. 285 ; Q.J.G.S., 

 vol. XXV, 1868, p. 53, pi. ii, figs. 1-5). — In the first place the 

 2)resence of eyes and the course of the facial suture remove it 

 from Conocoryphe, sens. str. The characters of Solenopleura, which 

 Matthew- has tabulated, agree in many particulars with those 

 present in this form. The surface is granular or subtuberculate, 

 the glabella is prominent, the dorsal furrows well defined, the 

 genal angles are pointed, the fixed cheeks are strongly swollen, 

 and the pygidium is small with but three segments. The rather 

 remote eyes, witli the ocular ridges, the parabolic glabella, the 

 course of the facial sutures, the strong margin to the head-shield, 

 and the marginate pygidium are also points in which G. applanata 

 agrees with Solenopleura. The tubercle on the neck-segment found 

 in the latter genus is also present in the type-specimen, though not 

 mentioned in Salter's description. The pleuras, however, of this 

 species are said to be pointed, while in Solenopleura Matthew 

 (op. cit.) describes them as bluntly rounded. All the specimens 

 of G. applanata which I have examined appear to have had blunt 

 tips to the pleurse, the pointed appearance being due to oblique 

 crushing or distortion. The weight of evidence is thei-efore in 

 favour of assigning this form to the genus Solenopleura. 



G? hucephala (Belt, Geol. Mag., Vol. V, 1868, p. 10, PL II, 

 Figs. 1-6). — This species is certainly not a true Conocoryphe, as 

 a brief inspection of the figures shows. The general characters of 

 the species place it amongst the Olenidje, and it may provisionally 

 be assigned to the genus Olenus. The crust of the glabella is said 

 to be unfurrowed as in Angelina and Gyclognathus, but when this is 

 removed or the glabella crusted two or three pairs of furrows are 

 seen. The triangular margin of the frontal lobe is peculiar, and 

 since the pygidium is also unknown its true generic position must 

 for the present remain a matter of doubt. 



G. hvfo (Hicks, Brit. Assoc. Eep., 1865, p. 285 ; Q.J.G.S., vol. xxv, 

 1868, p. 52, pi. ii, fig. 8). — This is a true Conocoryphe, sens, str., as 

 has been previously remarked.^ It appears to belong to the sub- 

 genus Bailiella (Matthew), of which G. Baileyi (Hartt) is the type, 

 and which is characterized by the facial suture cutting off a third of 

 the marginal fold instead of running along the outer edge of this 

 fold as in C. Sulzeri. Matthew (op. cit.) remarks that C. bufo 

 possesses a head-shield very like that of C. (bailiella) elegans 

 ^ Hartt), but the pygidium is not known. Linnarsson* had previously 



^ Die Silur., Etag. 2 and 3 (1882), p. 98. 

 * Trans. Roy. Soc. Canada, vol. v (1887), p. 134. 

 Matthew, Trans. Roy. Soc. Canada, vol. ii (1884), sect, iv, pp. 102, 103; 

 Reed Geol. Mag., Dec. IV, Vol. V (1898), pp. 495, 496. 



Sver. Geol. Undersokn., 1877, Om fauna i lagren med Faradnxides dlandims, 

 ^"t 11 ^'j^' ^~'* ' ^^'^^■- *^'^°'- Undersokn., ser. c, No. 35, 1879, Om faunau 

 1 ii-aiken med Conocoryphe exsulans, p. 19, t. 2, f. 26-28. 



