326 Revieivs — Dr. S. 0. Forbes — Stone Imjjiemenfs of Egypt. 



anteriorly rather sharp, posteriorly slightly swollen. End view, 

 dorsal edge acute, ventral well-rounded. Surface of shell finely 

 punctate ; this latter feature renders the generic determination as 

 Bythocypris a little doubtful. Length, -56 mm. ; height, '26 mm. ; 

 thickness of carapace, 18 mm. 



From the Eed Limestone of Nesselsdorf, Austria (Tithonian). 



This species approaches B. reni/ormis, Brady,^ in general form, 

 but in the side view of the latter, the posterior extremity is more 

 broadly rounded. 



(D 



Fie. 1. — Bytlwcypris Jiirassica, sp. nov. Fig. 2. — Bairdia Nusscldorftnsis, sp. nor. 

 X 30. X 30. 



Bairdia, McCoy [1844]. 

 Bairdia Nesselsdorfensis, sp. nov. (Figs. 2a-c.) 



Lateral view of carapace subtriangular, dorsal margin boldly 

 arched, ventral nearly straight, but slightly incurved near the lowest 

 third. The postero-dorsal margin incurved, postero-ventral angle 

 rounded. The antero - dorsal margin with numerous small and 

 pointed tubercles. Edge view elliptical, with rounded ends ; edges 

 of right valve embraced by the left. End view subcircular. 



Length, -6 mm. ; height, -25 mm. ; thickness of carapace, "26 mm. 



From the Eed Limestone of Nesselsdorf, Austria (Tithonian). 



la IB AT- IIB -VST- S. 



I. — On a Collection of Stone Implejients in the Mater 

 Museum, made by Mr. H. W. Seton-Karr in the Mines 

 OF THE Ancient Egyptians, discovered by him on the 

 Plateaux of the Nile Valley. By Henry 0. Forbes, 

 LL.D., Director of Museums to the Corporation of Liverpool. 

 Reprinted from Bulletin Liverpool Museum, II, Nos. 3 and 4 

 (20th January, 1900). With Illustrations. 



WE have here the results of Mr. H. W. Seton-Karr's examination 

 and survey of the district where he collected stone implements 

 in two of his Egyptian journeys (1896 and 1897), together with his 

 account of the conditions under which they occur on the surface of 

 a part of the Eastern Egyptian Desert, traversed by the Wady el 

 Sheikh, about 50 miles long, from S.E. to N.W., and entering the 



Eep. Chall., 1880, Zool., pt. iii, p. 46, pi. v, figs. \a-L 



