THE FAMILY EOTALIIDiE 225 



The present species is often associated with 

 Calcan'iKi in tlie httoral sands of coral islands. It 

 is easily distinguished from its congener by the 

 surface tuberculations, the ends of the pillars of 

 exogenous shell-growth, among other characters. 

 T. haculatus is found in extraordinary abundance in 

 some of the sands of the Pacific, the orange-brow^n 

 tests giving the deposits quite a colouring of their 

 own. It is most characteristic of the shore-sands of 

 the reef, but has been obtained from a depth of 

 200 fathoms, although sparingly. Becenf. (Plate 12, 

 fig. 0.) 



Genus G/jjj-sina, Caetee. 



Test free or attached, spheroidal or spreading ; 

 structure acervuline, radiating, or laminated; primor- 

 dial chambers spiral. The chambers are rounded or 

 polyhedral ; coarsely perforated. There is no sup- 

 plemental skeleton, nor canal system. Apertures 

 obscure, sometimes marginal. 



This genus also includes the type to which Carter 

 gave the name AjjJu'osina , and which appears to be a 

 plano-convex modification of Gypsina inlicEreiis, 

 Schultze sp. Cretaceous to Becent. 



Example. — G. vesicular is, Parker and Jones sp. 

 (OrbitoUna), 'Ann. and Mag. Nat. Hist.' ser. 3, 

 vol. vi. 18G0, p. 31, No. 5. 



This subconical form is a good type of the genus. 

 The surface is marked with fine raised lines, the 

 boundaries of the polyhedral chambers. G. vesicularis 

 and its attendant varieties occur in the sands of 



