NO. 4 CAMBRIAN TRILOBITES, 2D CONTRIBUTION RESSER II 



Lower Cambrian, Kinzers ; (loc. 49) near Emigsville, north of 

 York, Pennsylvania. 



Holotype.— U.S. 'N.M. no. 62737 ; paratype, no. 62738. 



Bonnia tumif rons, n. sp. 



Coryncxochus buharis Walcott (part), Smithsonian Misc. Coll., vol. 64, no. 5, 

 p. 314, pi. 56, figs. 3b-3f, 1916 (see B. bubaris). 



This is a very distinct species characterized by the shortness, width, 

 and great convexity cf its glabella, the presence of glabellar furrows, 

 the blunt thoracic segments and the presence of three lateral spines on 

 the pygidium. 



Occurrence same as preceding. 



Holotype. — U.S.N.M. no. 62739; paratypes, nos. 62740-72743. 



Bonnia capito (Walcott) 



Corync.rochus capito Walcott (part), Smithsonian Misc. Coll., vol. 64, 

 no. 5, p. 315, pi. 57, figs. 2, 2a, 1916. (Not 2b = 5. lata; 2c = B. sivan- 

 tonensis; 2d-e = B. vernwutcnsis.) 



This species must be confined to the York locaHty. 



Lower Cambrian. Kinzers ; (loc. 48b) York, Pennsylvania. 



Cotypes. — U.S.N.M. nos. 62746-62747. 



Bonnia lata, n. sp. 



Protypius scnectus Walcott (part), U. S. Geol. Surv. Bull. 30, p. 213, pi. 31, 

 fig. 2 (only), 1886 (figs. 2a.-c^B. swantotwnsis) ; lOth Ann. Rep. U. S. 

 Geol. Surv., p. 655, pi. 98, fig. 7 (only), 1891. 



Corynexochns capito Walcott (part), Smithsonian Misc. Coll., vol. 64, 

 no. 5, p. 315, pi. 57, fig. 2b (only), 1916 (see B. capita). 



A similarly wide but relatively longer form as compared with 

 B. tiimifroiis. 



Lower Cambrian, Parker; (locality stated to be loc. 25), Parker 

 Quarry, Georgia, Vermont, but the material suggests S wanton. 



Holotype. — U.S.N.M. no. 15421a. 



Bonnia swantonensis, n. sp. 



Coryncxochus capito Walcott (part), Smithsonian Misc. Coll., vol. 64, no. 5. 

 P- 315. pl- 57, fig- 2c (only), 1916 (see B. capita). 



A small smooth species with a slightly expanded glabella. 

 Occurrence same as preceding. 

 Holotype.— U.S.N.M. no. 15421b. 



Bonnia vermontensis, n. sp. 



Protypiis scnectus Walcott (part), U. S. Geol. Surv. Bull. 30, p. 213, pi. 31, 

 figs. 2a-c (only), 1886 (see B. capito) ; loth Ann. Rep. U. S. Geol. Surv., 

 p. 655, pi. 98, figs. 7a-c (only), 1891. 



Corynexochus capito Walcott (part), Smithsonian Misc. Coll., vol. 64, no. 5, 

 P- 315, pl- 57, figs. 2d, e (only), 1916 (see B. capito). 



