07 
in the latter. 1 On the other hand, the arrangement in Syringopora agrees with 
that of Try plasma, and, like the latter, the fistulie of the former are hollow 
and extensions of the visceral cavities; hut the processes in Eridophyllum 
proper “ are not connected with the interior of the coral.” 2 In one species 
of Eridophyllum (E. simcoense, Bill.), Bnminger has already noticed the 
resemblance to Syringopora. In describing the last-named coral as a 
Diphyphyllum , 3 he says: — “ The stems laterally connect by slender, transverse 
processes, similar to the transverse tubules of Syringopora — not, however, 
making communication between the visceral cavities, as in those, but merely 
fastening externally to the walls for mutual support.” 
This coral has been placed by Mr. G. B. Simpson in a new genus, 
Synaplophyllum, the connecting processes proceeding from all sides of a 
corallite, the expansions of adjacent corallites opposite, hoilow, and meeting 
and coalescing midway between, but intercommunication cut off by a 
partition formed of the Avail of one of the processes. Connecting processes 
also occur in Sclicenophylimn, Simpson, and Elacopliyllum , Simpson. 4 
9. Eugcc, or Pseudocostm. — Costae are not present in the Australian 
Tryplasmce , but the vertical, more or less parallel ridges traversing the 
exterior of the corallites from top to bottom, correspond to the secondary 
septal lamellae, and not to the primary ; in consequence of this, they are 
probably more nearly allied to rugae or pseudocostae. They appear to be the 
exothecal edges of the secondary septal lamellae, as the costae are those of 
the primary in other corals, and do not call for any special remark, except 
that neither granules nor teeth, or other special ornamentation, have been 
seen on them. 
10. Calicos . — In the few instances in which the calice is known, it 
has always proved to be deep, and in its lower course straight- walled. The 
calices of T. princeps , T. ivellingtonensis, T. derrengullenensis, and T. 
liliiformis fulfil, these conditions ; but in the last-named the upper portion 
expands into a wide bell-mouth cavity, with a flange-like periphery. The 
floor may be either concave, oblique, or rolling, sometimes horizontal, and is 
formed by the uppermost tabula, on to which the septal spines project more 
or less, according to species. 
1 Milne-Edwards and Haime — Archiv. Mus. Hist. Nat., V, t. 8, f. 6, t. 10, f. 4b ; Nicholson — Pal. Ontario, 
Pt. 1, 1874, p. 34 ; Simpson —Bull. N. York State Mus., 1900, VIII, No. 39, p. 214. 
2 Simpson— Bull. N. York State Mus., 1900, VIII, No. 39, p. 213, f. 37, p. 214. 
3 BiOminger -Geol. Survey Michigan. Lower Peninsula, 1873-70, III, Pt. 2, 1870, p. 123. 
4 Simpson — Bull. N. York State Mus,, 1900, VIII, No. 39, pp. 214-10. 
