si l ;-r|. ASS II 



TABULATA SYRIXGOPORIDAE 



101 



In these tin- walls of the conillites are represented by narrow fissures which 

 are bridged across by transverse rods, while the visceral chamber is filled up 

 with sandstone. /'. .%////.,/./-,/. Katon. from the Hamilton Group of North 

 America, is a closely related species, and also possesses the vermiform body. 



Mii-/n-lini<i, do Kon. (Fig. 179). Discoidal or hemispherical coralla, often 

 of considerable si/.e, and covered on the under surface with concentrically 

 striated epitheca, which frequently develops hollow radiciform processes. 

 (,'orallites polygonal, rather large. .Septa represented by numerous longitudinal 

 striae or ridges; mural pores irregularly distributed: talmlae very numerous, 

 oblique or curved, incompletely developed, and usually filling the visceral 

 chamber with loose vesicular tissue. Devonian and Carboniferous. M. fin-n* /, 

 de Kon., extraordinarily profuse in Carboniferous Limestone of Belgium. 



Family 2. Auloporidae. Nich. (Tubulosa, Milne-Edwards and Haime). 



Oreepfaff, branching, or reticulated tubular coralla, composed of cylindrical, beaker, 

 or trumpet-shaped condlites, with thick, imperfoi'ate, wrinkled walls. Septa represented 

 fry faint marginal striae ; tabular moderately numerous or want- 

 ing. Reproduction by baml or lateral gemmation. Ordovician 

 to Carboniferous. 



Aulopora, Goldf. (Fig. 180). All the corallites of the 

 prostrate corallum are attached by the whole of the lower 

 surface to some foreign object (Alveolites, other corals, or 

 mollusks). Tabulae more or less curved ; reproduction by 

 basal gemmation. Ordovician to Carboniferous. 



Cladoehontts, M'Coy (Pyrgia, E. and H.) Corallum 

 1 Handling, attached only at isolated points, and composed 

 of funnel-shaped corallites without tabulae and septa. 

 Reproduction by lateral gemmation. Carboniferous. 



lloiidngeria, Nich. (Quenstedtia, Rom.) Spreading, semi- 

 erect, bushy coralla, only basally attached, and with cvlin- 



i i 11 , i .L i mil ojxi , 



ducal corallites increasing by lateral gemmation. Tabulae Goldf. Devonian 

 moderately numerous, horizontal. Silurian and Devonian. 



tl'fnrmi*, 



1 " > sl 



stone; RognitatkmtL Fich 



telgebirge. Natural si/c. 



Family 3. Syringoporidae. Milne-Edwards and Haime. 



Fasciculate coralla composed of cylindrical <-<>r<tlHtcs, united 

 nf ///A/-/W.S along Hie sides by hollow connecting p}-ocesses or by 

 horizontal expansions. Walls thick, wrinkled; septa faintly 

 develoji"/, represented by delicate ridges or longitudinal rows 

 of spinules ; tabulae numerously developed, usually ineyulm-Iy 

 funnel-shaped. Reproduction by basal gemmation or by buds 

 arising from the connecting processes and ltnri;<iiit<il expansions. 

 Ordovician to Carboniferous; maximum in Devonian and 

 Carboniferous. 



Syringopora, Goldf. (Fig. 181). Fasciculate coralla. 

 often attaining considerable size, and composed of cvlin- 

 drical, thin-walled, somewhat flexuose corallites ; the latter 

 communicate by means of hollow, cylindrical, connecting 

 processes. Septa rudimentary; tabulae funnel-shaped. 



