THE FAMILY ASTEOEHIZIDiE 123 



Genus Saccaminina^ M. Saes. 



One or several gobular, pyriforin, or fusiform 

 chambers, with distinct apertures. Polythalamous 

 forms with or without stoloniferous connections. 

 Carhojiifeivus and Becent. 



Examples.— /S'. fusuliniformis, M'Coy sp. (=/S'. 

 Carteri, Brady) [Nodosaria fusulinaformis], 'Ann. 

 and Mag. Nat. Hist.' ser. '2, voh iii. 1849, pp. 131, 

 132. Chapman, ibid., ser. 7, voh i. 1898, p. 215, 

 woodcut. 



This is an important rock-forming organism, since 

 it often constitutes a large proportion of the lime- 

 stones of the Carboniferous formation. The weathered 

 spherical tests stand out in relief on the rock, and 

 the limestone containing them is called ' the spotted 

 post ■ by the Cumbrian miners. The subspherical 

 tests of S. fusuliniformis are usually found separated, 

 but such was not their condition during growth, for 

 when their remains are found protected, as, for 

 example, enclosed in the shell of EuomplidluH, we 

 find the chambers are united in a straight or slightl}' 

 curved series, and, indeed, even in the rock itself we 

 may often see two or even three chambers connected 

 together. Carbon ifovtis Limestone. (Plate 6, fig. C.) 



S. S'plicerica, M. 8ars, ' Vidensk.-Selsk. Forhandl.' 

 1868, p. 248; Brady, ' Eep. " Chall." ' vol. ix. 1884, 

 p. 253, pi. xviii. figs. 11-17. 



The globular or pjriform tests of this species are 

 composed of coarse arenaceous material. The sand 

 forming the walls is generally quartzose ; that of the 



