282 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



CALLAVIA CALLAVEI (Lapworth) 



Plate 42, Figs. 1-2 



Olenellus callaz-ci Lapworth, 1888, Geological Magazine, new series, Dec. 

 3, Vol. 5, p. 485. (Name proposed.) 



Olenellus callavei Lapworth, 188S, Nature, Vol. 39, p. 212. (Copy of pre- 

 ceding reference.) 



Olenellus (Hobnia) calcvi (Lapworth), Walcott, 1891, Tenth Ann. Rept. 

 U. S. Geol. Survey, p. 635. (Refers species to Hohnia as result of 

 having seen specimens of it.) 



Cephalacanthus callavei Lapworth, 1891, Tenth Ann. Rept. U. S. Geol. 

 Survey, by Chas. D. Walcott, pp. 640-641. (Compared with "Cephala- 

 canthus broggcri " and " C. kjerulft/') 



Olenellus (Holinia) callavei Lapworth, 1891, Geological Magazine, Dec. 3, 

 Vol. 8, pp. 530-536, pi. 14, figs. 1-25, and pi. 15. (Described and dis- 

 cussed, with special reference to its relations to Olenellus kjerulfi and 

 O. broggeri.) 



Olenellus (Holinia) callavei (Lapworth), Cole, 1892, Natural Science, 

 Vol. I, pp. 344 and 345. (Discussed.) 

 . Callavia callavii Matthew, 1897, American Geologist, Vol. 19, p. 397, 

 footnote. (New genus proposed.) 



Dr. Lapworth gives a very full description and illustration of the 

 fragments representing this species, and a diagrammatic restoration 

 based apparently on my restored figure of C. broggcri [Walcott, 

 i89i,pl. 9i,fig. i]. 



Callavia callavei differs from C. broggcri in its stronger genal and 

 intergenal spines and shorter occipital spine, form of the glabella, 

 and lateral extensions of the pleurae. It may be that other differences 

 will appear if better specimens become available for comparison, or 

 as the two species are very closely related, it may be found that they 

 are specifically more nearly identical than now seems probable. 



Formation and Locality. — Lower Cambrian : near the base of 

 the Comley sandstone (Hollybush series) in a purplish-red arena- 

 ceous limestone, Comley quarry, on the flanks of Little Caradoc, near 

 Church Stretton, Central Shropshire, England. 



CALLAVIA CARTLANDI Raw, MSS. 



Plate 42, Figs. 3-4 



Oloiellus (Hohnia?) cartlandi Raw, 1909, MSS. received from ]Mr. 

 Frank Raw, University of Birmingham, England, December 17, 1909. 



This species is founded on a single specimen found loose in the 

 quarry at Comley in Shropshire. It occurs on a characteristic piece 

 of chocolate and green limestone of the Callavia callavei bed of the 

 quarry that has been subjected to considerable abrasion and weath- 



