GARDINER—MADREPORARIAN CORALS. 287 
older specimens (longer in Museum) without localities. They do not belong to the 
species identified above as ZH. crassa, being much more akin to H. “imax, of which they 
are probably only varieties due to conditions of growth. 
VII. Genus PoLYPHYLLTIA. 
Polyphylla (pars), Blainville, Dict. des Se. Nat. lx. p. 305 (1830). 
Polyphyllia, Quoy et Gaimard, Voyage de l’Astrolabe, Zooph. p. 184 (1833). 
Lithactinia, Lesson, Illustr. Zool. pl. vi. (? 1833). 
Cryptabacia, M.-Ed. et H. Compt.-rend. de Acad. des Sc. xxix. p. 71 (1849). 
Polyphyllia, Lithactinia, Cryptabacia, M.-Ed. et H. Cor. iii. pp. 22-26 (1860). 
I have already shown my reasons in the general account of the family for combining 
the above three genera and no further reference is now necessary. 
The genus contains only two undoubted species, P. talpina (syn. P. pelvis) and P. nove- 
hibernie. P. substellata, P. leptophylla, P. pileiformis, and P. galeriformis are not 
recognisable from their original descriptions or from M.-Ed. & H.’s great work. ‘The 
distribution of the genus is East Indian, from the Philippines to New Ireland and 
Australia, doubtful species from Fiji also. 
26. Polyphyllia talpina, Lam. (Plate 36. fig. 13; Plate 38. figs. 18, 19; Plate 39. 
fig. 26.) 
Fungus marinus &e., Seba, Thesaurus, iii. p. 205 et 209, tab. 111. no. 6 et tab, 112. no. 31 (1758). 
Fungia talpina, Lamarck, Syst. des Anim. sans Vert. p. 370 (1801). 
? Polyphyllia talpa, Dana, Zooph. p. 313, pl. 21. fig. 5 a-d. 
Cryptabacia talpina, M.-Kd. et H. Cor, ii. p. 22. 
Polyphyllia pelvis, Q. et G., Voy. de Astrolabe, Zooph. p. 185, pl. 20. figs. 8 et 10. 
The larger specimen before me bears a very close resemblance to Seba’s No. 31, while 
it has the peculiar roughness of surface shown better in his No. 6; Seba’s specimens also 
came from the same region. Dana's description and figures very doubtfully refer to 
this species. 
Here is the description of my larger specimen (fig 26) :—An oval dise somewhat pointed 
at either end, measuring 135 cm. long by 4°5 em. broad. Distinct axial furrow along the 
whole length of the disc broken up into a series of secondary calicular centres by fusion 
across it of the smaller pairs of septa of either side, after which they continue along it in 
either direction to the neighbouring secondary centres in a %-like manner. Secondary 
centres rather oval, with about 24 septa fused together in the centre by a dense mass 
of fine trabeculee, the columella appearing relatively open. Septa of two alternating 
series, large and small. Larger septa seldom entire for more than 3—7 mm. except at 
the edge of the corallum, very thick, with granular ridged sides ending in columnar teeth 
covered with coarse spiniform granules, about 3 teeth in 2 mm. and each ‘5-1 mm. high. 
Smaller septa very thin, edges 2-8 mm. lower than first series, everywhere fusing 
together where the larger septa are broken, at edges of corallum appearing like a series 
of elongated loops in which the septa of the first series are standing, but near the 
central furrow 3-5 smaller septa bending round and fusing so that fresh subsidiary side 
