SUB-CLASS I HY DROZOA—CAMPANULARIAE as: 
Caunopora, Lonsd. (Fig. 199), and Diapora, Bargat., are Stromatoporoids 
which are indistinguishable from other species except by the presence of 
numerous definitely walled tubes penetrating the coenosteum at closer or 

Fia. 199. 

Caunopora placenta, Phill. Devonian; Torquay, 
Fic. 198, Devonshire. A, Tangential section, natural size. 
; B, The same, highly magnified ; a, Vertical ‘‘ Cauno- 
Stromatopora tuberculata, Nich. Devonian pora tube”; b, Canal partially cut into; c, Calear- 
(Corniferous limestone); Jarvis, Ontario. eous fibres traversed by delicate ramifying canaliculi. 
Natural size (after Nicholson). C, Vertical section, highly magnified. 
remoter intervals. The tubes are often thick-walled, are furnished with 
horizontal or funnel-shaped tabulae, and occasionally with septal spines; in 
many cases they evidently represent the corallites of Aulopora and Syringopora 
colonies, which have become enveloped, but have continued to live commensally 
within the tissues of the Stromatoporoid. In other 
cases, however, the tubes appear to have been formed 
by true Stromatoporoid polyps. Devonian. 
Hermatostroma, Nich. (Fig. 200). Massive or 
foliaceous skeletons, composed of thick parallel lati- 
laminae, connected by vertical pillars; pillars often 
running continuously through several concentric 
laminae. Both pillars and laminae exhibit a dark 
median line when viewed in cross-section, indicating 

Fia. 200. 
oD s Ovi Hermatostroma, sp. Devonian ; 
either the presence of axial canals or composition porqnay, Devonshire. a, Horizontal 
out of two lamellae Devonian lainina composed of two slightly 
. 5 separated lamellae; >, Interlaminar 
Idiostroma, Winch. ' Coenosteum cylindrical or chamberlet; c, Radial pillar tra- 
: : ee versed by axial canal. 
fasciculate, traversed by axial, tabulate zodidal tubes, ~~ nf 
which give off secondary lateral tubes. General tissue reticulated, similar to 
Stromatopora. Devonian. 
Stylodictyon, Stromatoporella, and Syringostroma, Nich.; Amphipora, Schulze ; 
Stachyodes, Bargat. Devonian of Europe and North America. 
A number of genera are described by Waagen and Wentzel from the 
Permo-Carboniferous rocks of Farther India, such as Carterina, Disjectopora, 
Circopora, ete. 
Order 4. CAMPANULARIAE. Allman. 
(Leptomedusue, Calyptoblastea, Allman ; Thecaphora, Hincks.) 
Delicate, branching, plant-like, sessile colonies, with chitinous periderm enveloping 
the base, peduncle, and also the cup-like receptacles (hydrothecae) which enclose the 
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