224 THE FOEAMINIFERA 



Example.— (7. liispida, Brady, ' Proc. E. Irish 

 Acad.' ser. 2, vol. ii. 1876, p. 590; ' Eep. "Ciiall."' 

 vol. ix. 1884, p. 713, pi. cviii. figs. 8, 9. 



This pretty little aculeate form is very common 

 in tropical parts of the Pacific and Indian Oceans, in 

 the neighbourhood of coral islands. It usually affects 

 shallow water down to 60 fathoms ; at Funafuti it 

 occurs sparingly at 200 fathoms. Becent. (Plate 12, 

 fig. N.) 



Sub-faniilij 3. Tinopoein.e. 



Test consisting of irregularly heaped chambers 

 with or without a more or less distinctly spiral 

 primordial portion ; for the most part without any 

 general aperture. 



Genus Tinoponis, Montfokt. 



Test lenticular or subspheroidal, with radiating 

 marginal spines and tuberculated surface ; central 

 chambers forming a piano-spiral disc, which is 

 thickened by an aggregation of smaller chambers 

 arranged in tiers on the two sides. No general 

 aperture, the extrusion of sarcode taking place chiefly 

 through the canals of the spurlike growths of the 

 supplemental skeleton. Becent. 



On account of the somewhat dubious depiction of 

 Montfort's type this genus is referred to as Baculo- 

 gypsina by many authors. 



Example. — T. haculatus, Montfort, ' Conchyl. 

 System.' vol. i. 1808, p. 146, 37'' genre ; Carpenter, 

 ' Phil. Trans.' 1860, p. 557, pis. xviii. xxi. 



