F. R. CoR-per Reed — On the Genus Conocoryphe. 255 



probably a true member of the genus Conocoryphe. The narrow 

 marginal free-cheeks, the course of the facial suture, the absence of 

 compound eyes, the number and characters of the thoracic segments, 

 are features in which it completely agrees. 



G. malvernius, Phillips (" Geology of Oxford," 1871, p. 68, 

 fig. 5). — As far as the imperfect figure allows one to judge, this 

 species appears to belong to the genus Peltura. At any rate, it is 

 not a Conocoryphe, but is referable to one of the Olenidee. 



C. monile, Salter (Cat. Camb. Sil. Foss. Woodw. Mus., 1872, p. 32 ; 

 Callaway, Q.J.G.S., vol. xxxiii, 1877, p. 665, pi. xxiv, fig. 4).— This 

 species, which was first described by Callaway (op. cit.), has been 

 assigned to the genus Euloma by Briigger,' of which it exhibits all 

 the typical features. 



C. ? olenoides, Salter (Mem. Geol. Surv., vol. iii, 1866, p. 308, 

 pi. viii, fig. 6). — It is quite doubtful to what genus this species 

 should be referred, but we cannot have any hesitation in removing 

 it from Conocoryphe and placing it amongst the Olenidse. 



C perdita, Hicks (Q.J.G.S., vol. xxv, 1869, p. 53, pi. ii, fig. 3).— 

 This species has never been fully described, and the only published 

 figure of it is most unsatisfactory. Hicks (op. cit.) says G. biifo is 

 its nearest ally, and if this be the case it must probably be a true 

 Conocoryphe. 



a Planti, Salter (Cat. Camb. Sil. Foss. Woodw. Mus., 1872, 

 p. 11). — This species, founded on well-preserved specimens, is an 

 excellent example of the subgenus Parabolinella of the genus 

 Olemis, and a description of it is now in the press. Salter (op. cit.) 

 assigned it correctly to Olenns. 



C. ? simplex, Salter (Mem. Geol. Surv., vol. iii, 1866, p. 306, 

 pi. V, fig. 17). — The smootK glabella, the very forward position 

 of the eyes close to the front end of the glabella, and the course 

 of the facial suture agree well with Cyclognathus, to which it may 

 be referred. 



G. solvensis, Hicks (Q.J.G.S., vol. xxvii, 1871, p. 400, pi. xvi, 

 fig. 8). — I have previously - referred this species to Ctenocephalus, 

 and probably it belongs to its subgenus Hnrtella, as Matthew^ has 

 remarked, and resembles C. llattheioi, Hartt. A Scandinavian 

 species which is very closely allied, or may be only a variety of 

 C. solvensis, is Conocoryphe exsidans, Linnarsson.'' 



C. ? variolaris, Salter (Q.J.G.S., vol. xx, 1864, p. 236, pi. xiii, 

 figs. 6, 7). — The characters of the head-shield, eyes, and facial 

 sutures at once remove it from Conocoryphe, sens. str. Salter 

 compares it to C. Bibeiro, Barrande, and also mentions that in some 

 respects it resembles the genus Sao. But the lobation of the 

 glabella is very different to that in Sao hirsuta, and the genal 

 angles are furnished with definite spines, turned slightly outwards, 



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



2 Geol. Mao., Dec. IV, Vol. V (1898), p. 49.5. 



3 Trans. Eoy. Soc. Canada, vol. ii (1884), p. 103. 



* Sver. Geol. Undersokn., ser. c. No. 35, Om Faunau i Kalkon med Co)i(>. 

 txmlans (1879), p. 15, t. ii, f. 21, 22. 



