On Ostracoda, etc., from the Devonian of Germany. 333 



Section MYODOCOPA. 



Family Cytherellid.*;. 



Genus Cytherella Jones. 



Cytherella prevalida sp n. (PI. VIII, figs, 12a, h.) 



Description. — Carapace seen from the side, bean-shaped or 

 elongately ovate ; ventral margin gently incurved, dorsal widely 

 arched; anterior broadly rounded, posterior narrowly rounded. 

 Edge view depressed ovate, median area compressed. 



Dimensions. — Length, 0*78 mm.; height, 0"44 mm.; thickness 

 of carapace, • 3 mm. 



Observations. — This form is fairly common in the small amount 

 of residue from the limestone. In general form it resembles the 

 Carboniferous species Ci/fherella valida, Jones, Kirkby and Brady,* 

 but is smaller, more compressed, and broader anteriorly. 



Occurrence. — Middle Devonian ; Paffrath. 



The Foraminifera. 



Family Lituolid.e. 



Genus Ammodiscus Reuss. 



AmmodisGus incertus d'Orbigny sp. 



Operculina incerta d'Orbigny, 1839, Foram. Cuba, p. 49, pi. v, figs. 16, 17. 



Trochammina incerta d'Orbigny sp., Brady, 1876, Carboniferous and 

 Permian Foram., Pal. Soc. Mon., vol. xxx. p. 71, pi. ii, figs. 10-4. 



Ammodiscus incerttis d'Orbigny sp.. Chapman and Howchin, 1908, Mon. 

 Foram. Permo-Carb. N. S. Wales, Pal. Mem., No. 14, Geol. Surv. N. S. 

 Wales, p. 10. 



Ohser rations. — A minute test of this species was seen in one of 

 the thin sections of the limestone, consisting of several convolu- 

 tions, and having a fine sandy test. I have found this species in 

 the Silurian of Lilydale, Victoria, and it ranges upward to recent 

 times. 



Occurrence. — Upper Devonian {Clymenia Kalk) ; Schiibel- 

 hammer, Bavaria. 



* Pal. Soc. Mon. 1884, Mon. Brit. Foss. Bivalved Entom. of Carbonif. Form. , 

 pt. 1, No. 2, p. 70, pi. vi, figs. 2a-e. 



