L 



H 



w 



0-67 



o-37 



o-34 



0-63 



o-37 



— ■ 



o-59 



0-32 



— 



o-68 



o-37 



— 



o-59 



0-40 



— 



o-6o 



o-37 



— 



FROM WEST PAKISTAN 77 



MORPHOTYPE A 



(Plate 37, figs. 11 ; Plate 38, figs. 1-10 ; Plate 39, fig. 11) 



This has a tuberculate surface. Tubercles vary in size and number. Some have 

 few large tubercles with a tendency to become spinose and in others tubercles are 

 small and rounded. 



Dimensions (mm). 



Io. 4354 Carapace male (holotype) 



Io. 4307 Right valve female 



Io. 4306 Left valve male (juvenile) 



Io. 3151 Right valve male 



Io. 3152 Left valve female 



Io. 3154 Right valve female 



Morphotype B 

 (Plate 39. figs. 1-8) 



This is very similar to Morphotype A, but has a surface ornamentation which is a 

 combination of reticulations and tubercles. 



Dimensions (mm). 



Io. 3150 Carapace male 

 Io. 3153 Carapace female 



Remarks. This species has been described as Genus and sp. indet.G. by I. G. 

 Sohn in his paper on Lower Tertiary ostracods from Western Pakistan, still in press. 



Genus TRACHYLEBERIS Brady 1898 

 Type species. Cythere scabrocuneata Brady 1880. 



Subgenus TRACHYLEBERIS sensu stricto 



Trachyleberis (Trachyleberis) lobuculus sp. nov. 



(Plate 39, figs, 9, 10 ; Plate 40, figs, i, 3) 



Derivation of name. Latin lobus, lobe + oculus, eye ; with reference to the 

 lobate eye-tubercle. 



Diagnosis. A species of the subgenus Trachyleberis in which eye-tubercle is 

 lobate, surface ornamented with tubercles, posterior cardinal angle well-marked in 

 left valve. 



Holotype. Io. 4364, a female carapace (PL 40, figs. 1, 3). 



Paratype. Io. 4308. 



L 



H 



w 



o-66 



o-37 



0-32 



0-62 



o-37 



0-31 



