124 MB. C. W. ANDREWS AND OTHERS ON THE [Feb. 20, 



POCILLOPORA (?) FAVOSA. 



Pocillopora (?) favosa Ehrenberg, Corallenthiere, p. 127. 



Two small tufts of short, stoui;, compressed lobes, thickly covered 

 with small conical, or rather pointed processes; no septa visible except 

 as striae in the very young calicles. These two specimens are placed 

 under this specific beading with some hesitation. In M.-Edwards's 

 description of P. favosa a distinct columella is mentioned, but uo 

 septa. Mr. Stanley Gardiner ' describes septa — " the primaries 

 being specially thick and bluntly spined ; " and Dr. Klunzinger 2 , 

 who photographed the original type, says that there is little 

 columella, and the septa are hardly at all developed. In these 

 last points the two specimens from Christmas Island agree with 

 Ehrenberg's type, but hardly with its more freely branching growth. 



Occurs in pools and channels on the reef-fiat, Flying Fish 

 Cove. 



Genus Goniastr^ea M.-E. & H. 



GoNIASTR.EA RETIFORMIS. 



Goniaxtrcea retiformis (Lamarck) M.-E. & H. Les Coralliaires, 

 ii. p. 446. 



Two fragments of a convex small-calicled species of Goniastraa 

 which may be provisionally placed with this species. The size of 

 the calicles (3 mm.) agrees, but their depth is greater, at least on 

 the summit of the stock, where it may reach 5 mm.; elsewhere it is 

 :J mm., as given by Milne-Edwards & Haime. 



Xo locality is given for Lamarck's type. 



There is further a spirit-specimen in a good state of preservation, 

 which shows the living colony to have been of a bright green colour. 

 The dried skeletons with attached organic matter are reddish 

 brown. 



Found in pools and channels on the reef-flat, Flying Fish 

 Cove. 



GONIASTR^A AURICULARIS, sp. n. 



Description. Colony forms ear-shaped, semicircular plates which 

 project horizontally from the sides of rocks. Its upper surface is 

 slightly concave, the edge thin and sharp, supported by continuous 

 epitheca which covers the whole under surface. The thicker parts 

 are about 1*5 cm. 



The calicles, owing to the method of multiplication, vary greatly 

 in size, the maximum beiug about 3-5 mm. The top of the thin wall 

 is a fine zigzag ; some 16-18 visible septa rise to the top of the wall 

 and may even make the edge slightly denticulate ; between these, 

 faint traces of another cycle can be seen with a pocket-lens. 

 The swollen inner edges of the primaries (at times of a few 

 secondaries also) rise as thick, flattened, round-topped pali to 

 within about 1 mm. of the top of the wall. 



1 Proc. Zool. Soc. 1897, p. 941. 



- Corallenthiere, iii. 1879, p. 68, pi. vii. fig. 2. 



