On two new Genera and Species of Indian Mantidac. 219 



pore-tubulation on the septum ; h, laternl view of the same, ex- 

 tending,^ one third of the way tliroiif^h the wall uf the test ; c, the 

 remainiiifjr portion formed of grains of calcareous sand, in the 

 midsl of which is the continuation of the pore-tuhuhitiun in the 

 form of " labvriiitliic structure," here omitted for perspicuity : 

 scale l-4Hth to 1-l^UOth inch, il, surface-end of j)ore-tube, more 

 majrnitieil, to show the pore in its centre : scale l-12th to 

 1-1 sooth inch. 



N.B. It should here be remembered that as the chambers are 

 successively develoi)ed in Vulvulina, the septum presents the same 

 structure as the walls of the test — that is, that the upper or inner 

 portion is pore-tubulated, and the outer or lower one arenaceous. 

 Fig. 25. The same : portion of surface nnignitied, to show, «, the angular 

 pore-openings of the " labyiinthic structure " in the midst of the 

 sand-grains. Diagram. 

 Fi(f. 20. Lituola caiuiriensis, D'Orb., natural size. 



Fii/. 27. The same : magniticd view, to show : — a, the large and small 

 grains of quartz sand respectively of which the test is composed ; 

 6, the enas of the pore-tubuhitiou or " labyriuthic structure " 

 after slight abrasion of the surface. Diagi-am. 

 Fiff. 28. The same: much more magnified, to show: — «, the holes of inter- 

 cameral comnmnicution in the septum ; bbb, the pore-tubulation 

 or " labyrinthic structure "' in the wiUl of the test ; c, pseudo- 

 podial aperture ; d, lines indicating externally the limits of the 

 chambers respectively. Diagi-am. 

 Fiff. 29, The same : portion of fig. 28, d, more magnified, to show the 

 pore-tubulation or '• labyriuthic structure '' in the midst of the 

 sand-grains composing the wall of the test, a, pore-tubulation; 

 b, openings of the same on the inner surface of the wall ; c, dark 

 line indicating sarcodic lining ; d, surface, consisting of large 

 and small grains of quartz sand respectively, the latter forming 

 a kind of cement to the former. 



XVII. — Descriptions of (tea new Genera and Species of Indian 

 ^lanticUu. By Prof. J. WuOD-Mason, Assistant Ciu-ator, 

 Indian Museum, Calcutta. 



Genus DanurIA, Stdl. 

 Subgenus 1. Danuria. 

 1. Danuria Thunhergi, St&l. 

 Hah. Port Natal. 



2. Danuria Bolauana, Sauss. 

 Hah. Zanzibar. 



3. Danuria superciliaris, Gcrst. 



Hah. Zanzibar. 



15* 



