F. R. Cowper Reed — Blind Trilobites. . 495 



Conocoryplie, and he considers Atops to bo distinct and its type to 

 be A. trilineatus (Emmons). Linnarssou^ uses the name Conocoryplie 

 in the same restricted sense as Walcott. ZitteP employs the name 

 Conocephalites in the broad manner of Barrande, including the 

 genera Solenopleura, Ptychoparia, Conocoryphe, s.str., etc. 



Matthew,^ perceiving the heterogeneous composition of Barrande's 

 Conocephalites, splits it up into two divisions, one possessing eyes 

 and the other possessing no eyes. The blind division constitutes, 

 according to him, the subfamily Conocoryphinae, which consists of 

 two genera — (1) Ctenocephahis, tyTpe Ctenocephalus Barrandei (Corda) 

 =1 Conocephalites coronatus (Barr.), with subgenus Martella, probably 

 including Conocoryphe solvensis (Hicks) ; (2) Conocoryphe, type 

 Conocoryphe Sulzeri (Schloth.), with a subgenus Bailiella, to which 

 perhaps Conocoryphe bufo (Hicks) belongs. This subgenus Bailiella 

 is not synonymous with Salter's Erinnys (type -E'. venulosa, Salter) 

 as Beecher suggests."^ In Bailiella, as defined by Matthew (type 

 B. Baileyi, Hartt), there is a facial suture which cuts off the lateral 

 third of the marginal fold. Matthew's^ other division of Barrande's 

 genus Conocephalites consists of those possessing eyes and includes 

 the EllipsocephalidEe and Ptychoparinse (Ptychoparia, Liostracus, 

 Solenopleura). Hoernes,® though remarking on the fact that the 

 facial suture in C. Sulzeri and G. coronatus is almost marginal, 

 separating only a narrow band-like free cheek, and in this respect 

 differing from that of the other species, yet uses the name Conocoryphe 

 in the broad sense so as to include a multitude of very different 

 forms. Koken ^ puts Corda's Ctenocephalus and Conocoryphe into 

 one genus, which he calls Conocoryphe. 



The generic name Conocoryphe is here employed in the manner 

 which Matthew (loc. cit.) has defined. To the genus Ctenocephalus, 

 as also defined by him, belong the British species Ct. coronatus 

 (Barr.) and Ct. solvensis (Hicks). In botli Europe and America 

 these two genera are restricted to the Cambrian, and are especially 

 characteristic of the lower part, which is just as we should expect 

 from their morphology and phylogeny. 



Of the other genera belonging to this family we have in Europe 

 Erinnys (Salter), Carausia (Hicks), Bictyocephalites (Bergeron),® 

 and the imperfectly described forms ^ Aneucanthus (Angelin) and 

 Eryx (Angelin). 



Erinnys,^° of which only one species, E. venulosa (Salter), is known, 



1 " Om Fauna i Kalken med Conocoryphe exsulans " : Sver. Geol. TJndersokn., 

 ser. C, No. 35 (1879). 



^ Handb. v. Palseont. , vol. ii, p. 600. 



3 Trans. Roy. Soc. Canada, vol. ii (1884), sect, iv, p. 102. 



* Amer. Journ. Sci., vol. iii (1897), p. 188. 



6 Trans. Eoy. Soc. Canada, vol. v (1887), p. 123. 



6 Manuel de Paleont. (traduit), 1886, p. 462. 



7 Die Leitfossilien, 1896, pp. 21 and 360. 



^ Bull. Soc. Geol. France, ser. iii, vol. xxiii (1895), p 469, pi. iv, figs. 4, 5. 

 ' Pal. Scaud., pp. 4, 5, pi. v. 



10 Brit. Assoc. Report, 1865, p. 285 ; Quart. Journ. Geol. Soc, vol. xxviii (1872), 

 p. 177. 



