RMzopodal Genera Webbina and Vitrlwebbina. 327 



he had found in the Cretaceous beds of the Haute-Marne 

 Department. These three species of Webbi?ia were described 

 by d'Orbigny as to their form and superficial texture, but the 

 nature of the test, which is so important in grouping the 

 Foraminifera, seems to have been quite overlooked. These 

 specimens have been referred to as arenaceous forms * ; but 

 there are no grounds for the supposition. Terquem follows 

 in 1852 t, and records several species of Webbina from the 

 Infra- Lias of the departments of the Moselle, of the Ardennes, 

 and from the east of Belgium ; but concerning these forms 

 also we are doubtful as to their textural cliaracters, and they 

 are perhaps mainly referable to Nubecukiria. Von Reuss in 

 1862 I refers to Nubecu/an'a n-reffulari's as occurring in the 

 " Speeton Clay " of North Germany. From his description 

 there is very little doubt that Reuss's specimens belong to 

 Vitriwebbina (the hyaline form of Webbina). Professors 

 Jones and Parker, in 1865 §, were the first authors to refer to 

 Webbiyia as a subtype of Trochammina^ and they retain 

 Webbina irregularis as the type " with its varieties W. clavata 

 &c.," supposing these to be arenaceous. In 1866 Jones, 

 Parker, and Brad}^ || described Webbina as a subgenus of 

 Trochamrnina, and give the following as the general characters 

 of the genus : — " Shell adherent, comprising one or more 

 pyriform, oval, or round chambers, subarenaceous, smooth, 

 dirty white, or ot a deep rusty colour, and, when numerous, 

 arranged in a single irregular moniliform line, often branched." 

 At the same time these authors described a new species, 

 W. hemisphcerica, from the Coralline Crag of Suffolk. 

 Dr. H. B. Brady, in 1884 {op.cit. p. 66), treated Webbina as 



terrain cretace inftrieur du departement de la Haute-Marne," Mem. Soc. 

 geol. France, s6r. -2, vol. iii. 1848, p. 250, pi. ii. figs. 3G (right-hand figure) 

 and 37. 



• Brady, H. B., " Report on the Furaminifera dredged by H.M.S. 

 ' Challenger ' during the years 1873-1876," Reports of the Scientific 

 Results of the Voyage of H.M.S. 'Challenger,' vol. x., Zooloo-y (London 

 1884), p. 348. " ' o. V , 



t 'L'erquem, O., '^ Recherches sur les Foraniiniferes de I'etao-e moven et 

 de I'^tage inferieur du Lias,' Mem. II , Mem. Acad. Imp. Metz vol xlii 

 1862, pp. 455-459, pi. vi. tigs. 15-19. 



X Reuss, A. E., " Die Foraminiferen des norddeutschen Hils und 

 Gault, ' Sitzuiigsb. d. k. Ak. Wi.^s. Wien, vol. xlvi. Abth. i. 1862 (1863) 

 pp. 30, 31. ^ ' 



§ Parker, W. K., and Jones, T. R., " On some Foraminifera from the 

 North Atlantic and Arctic Oceans, including Davis Straits and Baffin's 

 Bay," Phil. Trans. Roy. Soc. vol. civ. 1865, p. 435. 



II Jones, T. R., Parker, W. K., and Brady, H. B., ' A Monograph of 

 the Foraminifera of the Crag,' Part L, Palseontographical Society 

 vol xix. for 1865 (1860), pp. 25-27. 



23* 



