20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 95 



Elyx Angelin, Pal. Scand., 3d ed., Holmiae, p. 4 (1854), 1878. (Misprinted 



Eryx.) 

 Harlella Matthew, Trans. Roy. Soc. Canada, vol. 2, sec. 4, p. 103, 1885. 



It is possible that Elyx might be estabhshed as a distinct genus be- 

 cause of the angular outline, but since otherwise it agrees with 

 Ctenocephaliis, present usage is continued. 



Matthew erected Hartella as a subgenus of Ctenocephalus, stating 

 that both had a frontal lobe anterior to the glabella but that Cteno- 

 cephalus had a "wall-like front to the cheeks and frontal lobe," whereas 

 Hartella had " a sloping front to the cheeks and frontal lobe." He 

 further characterized both genera as having a small pygidium in con- 

 tradistinction to Conocoryphe. The mentioned difference in the ante- 

 rior portions of the head might be interpreted as indicating separate 

 genera, but because there seems to be an intergradation in this respect 

 from species to species, it seems wiser to drop Hartella. 



Genotype. — Conocephalus coronatus Barrande. 



Range. — Same as Conocoryphe. 



Species previously referred to Ctenocephalus: 



C. coronatus (Barrande) C. latilhnbattus (Brogger) [doubtful] 



C.exsulans (Linnarsson) C. tiimidtis GronwaW 



C.laticeps (Angelin) 



In addition there are the species previously referred to the subgenus 

 Hartella: 



C.mattliczvi (Hartt) C. pcrliispidns (Matthew) 



C. hispidiis (Matthew) 



Besides these eight species, several that were suppressed appear to 

 deserve full recognition. They are listed below. 



Ctenocephalus geminispinosus (Hartt) 



Conocephalitcs gcjiiini-spinosus Hartt, in Dawson, Acadian Geol., 2d ed., 



p. 653, 1868. 

 Ctenocephalus (Hartella) niafthczui geminispinosus Matthew, Trans. Roy. 



Soc. Canada, vol. 2, sec. 4, p. 106, 1885. 



Middle Cambrian, St. John (ic) ; localities in New Brunswick. 

 Holotype. — Cornell Univ. 



Ctenocephalus hartti, n. sp. 



Conocoryphe (Subgenus?) nial fhezm Waj.cott (part), U. S. Geol. Surv. Bull. 

 10, p. 28, pi. 4, fig. I, 1884 (not ia= C. Iiispida). 



This species is distinguished by the system of veins underlying the 

 scattered granules. Moreover, the veins increase in strength on the 

 anterior portions of the cheeks beyond the raised lines which extend 



