l66 NEW YORK STATE MUSEUM 



very different from the type B. dilatata Reuss. Perhaps 

 a more typical specimen is one of the two Bolivinae seen on sHde 6 

 in close proximity. Other specimens are shown on slides i and 

 5 (X) , the latter being the one figured. 



Bolivina punctata d'Orbigny 



Plate 3, figures 3, 4 



Bolivina punctata d'Orbigny, 1839, Foran. Amer. Merid., p. 61, pi. 



viii, figs. 10-12 

 Bolivina p u n c t a t a Vadisz, 191 0, Triasforam. aus dem Bakony, 



p. 15, pi. I, fig. 7 



In addition to the stoutly built and wide spreading Bolivinae 

 there occur two or three delicate, still more minute, Bolivinae which 

 seem to belong to B. punctata. The only doubt lies in the 

 small number of chambers, as most examples of B. punctata 

 carry many chambers in each series. Two of our types show but 

 five segments in a series, while many forms of this species show 

 from seven to twelve or more. The best example we have of this 

 species measures but o.io mm in length. 



It is not so common as B. dilatata, but is a type which 

 has been found in Triassic and later horizons. It appears to be 

 wanting in the Carboniferous of Europe. 



Bolivina sp . . . . perhaps B. reticulata Hantken 



Plate 3, figures 5-7 



On slide 6 (see figure 5), near the northeast corner, is a cross 

 section of Bolivina which has five widely inflated segments in each 

 series, strongly overlapping and highly arched on their extremity 

 so that the outline closely resembles Bolivina reticulata 

 Hantken, but also Bolivina dilatata Reuss, though both 

 of these species have more chambers in each series than does the 

 present type. We are inclined to think that this is a new species 

 of Bolivina though it may be a variety of either of the above. We 

 shall consider it, however, a variety of B. reticulata as the 

 reticulate surface might not show in cross section. In length the 

 specimen measures 0.26 mm. 



Genus LAGENA Walker & Boys 



Several species of this simple unicellular foraminiferan are knowu 

 in Upper Cambrian deposits. A few of these were described by 

 Mr F. Chapman in his report on the Foraminifera of the Malverns" 



^ On Upper Cambrian Foraminifera from the Malverns ; and on Some of the 

 Earliest Kncwt. Foraminifera. Quar. Jour. Geol. Soc, 1900, 56: 257-63. 



