ACTINOZOA. 
499 
Heteropsammia geminata, sp. n., Verrill (Am. J. Sc. xlix. p. 370), 
Burmah. 
llhizopsammia, g. n., Verrill (I'd. p. 510). Corallum compound, low, 
incrusting, extending by stolon-like expansions of the base, from which the 
buds arise. Corallites cylindrical, or nearly so, connected by thin creeping 
extensions of the base, which have the same porous texture as the wall. 
Polype-cells subcircular or elliptical. Septa thin, crowded, a little projecting, 
arranged in four or fi ve cycles, those of the last cycle well developed, uniting 
to those of the preceding cycle, which rise up in the form of prominent pali- 
form lobes, beyond which the central region of the cell is deep. Columella 
very porous, its surface papillose. Walls very porous, destitute of epitheca, 
with scarcely distinct costae, but with series of rough granules. JR. pulchra, 
sp. nov., Verrill {ib. p. 610), Pearl Island. 
Turhinaria dichotoma, sp. n., Verrill (^6. p. 89), locality unknown, probably 
Bonin or Loo-Choo Islands. 
Poritidce. 
Porites calif arnica, sp. n., Verrill (Tr. Conn. Ac. i. p. 504), Gulf of Cali- 
fornia j P. porosa, sp. n., Verrill (ib. p. 504), Gulf of California ; P. extavata, 
sp. n., Verrill (ib. p. 504), Pearl Island ; P. nodulosa, sp. n., Verrill (ib. p. 606), 
Gulf of California. 
Favositipora, g. n., Kent (Ann. N. H. (4) vi. p. 385). Resembling Al- 
veopora, but with transverse septa or tabulae. This genus is interesting as 
supplying a link between the long-extinct genus Favosites (through the cre- 
taceous Jconinckirt) and the Madrcporaria perforata. Its structure and its 
close relations with Alvcopora help to demonstrate the untenableness of the 
doctrine that “ tabulate ” Corals are necessarily the productions of Hydroid 
polypes. F. deshayesii, sp. n., Kent (ib. p. 386), Paris Museum, locality un- 
known. P. paleeozoica, sp. n., Kent (ib. p. 380), fossil, probably North-Ame- 
rican, Devonian, or Oarboniferous ; specimen in the British Museiitn ; locality 
unknown. 
Montipora extra, sp. n., Verrill (Proc. Ess. Inst. vi. pt. 1, p. %^, — M.folio8a, 
? Verrill, non Edw. & Haime, Caspar Straits; M. lichenoides, sp. n., Verrill 
(ib. p. 86), Loo-Choo Islands; M. patida, sp. n., Verrill (ib. p. 87), Hawaiian 
Islands. 
