MATTHAI— RECENT COLONIAL ASTR^ID^ 113 



This specimen as well as Ellis and Solander's figure of Madrepora favosa have much 

 the same facies as some of my examples of Favia favus, but possess, on the whole, larger 

 corallites. Polyps are, however, necessary to determine if the specimen represents a good 

 species or is only a large form of F. favus. 



In the Paris Museum Prionastrcea favosa and magnistellata are each represented by 

 a large specimen and Acanthastrcea bowerbanki by a very small one. I fail to see any 

 differences separating these three species. They have, on the whole, larger corallites 

 than my specimen, with the calices widest at the calicular openings and gradually narrow- 

 ing towards their bases ; moreover the inter-calicinal walls are ridged, the septa slope 

 down towards the columellee, those of neighbouring corallites meeting over the walls. 



In the Glasgow Museum I have examined a specimen (16'5 x 14 x 9-5 cm.) which 

 resembles Milne Edwards and Haime's P. magnistellata or P. favosa but it is doubtful 

 if it is Ellis and Solander's figured type. Prof Graham Kerr does not include it in his 

 list* of specimens described by these authors. 



According to Milne Edwards and Haime, Madrepora favosa (pars), Linn sens, is a 

 rugose species Stauria astreiformis {Cor. iii, p, 325). 



21. Favia fragum (Esper). 



A single convex specimen (7 x 5"5 x 4'5 cm.) from St Vincent, collected by Mr C 

 Crossland. I hope soon to give a full account of this interesting species in the scientific 

 Report of the British Antarctic Expedition based on material collected off" South Trinidad. 

 I have also seen examples of it in the Paris Museum. 



22. ? Favia paevimurata, Gardiner. 



1904. Favia parvimurata, Gardiner, Fauna Geogr. Maldive and Laccadives Archipel., ii, p. 771, pi. 62, 

 fig. 25. 



The only existing representative of this species is Gardiner's type (ll"5 x 10 x 4 cm.) 

 from Hulule. The principal characters of this specimen are the penta- or hexagonal shape 

 of the corallites, the thinness of the inter-calicinal waUs, the last septal teeth being 

 upright, high (1'5 mm.), broad and swollen at their bases, with their outer edges sloping 

 away from their pointed tips and inner margins vertical. There is a conspicuous pali- 

 crown ; but towards the edge of the specimen the teeth are thin and short and hence 

 the pali-crown is inconspicuous, the corallites approaching those of Favia bertholleti in 

 appearance. 



Somewhat resembling this specimen is Milne Edwards and Haime's type (small and 

 flat) of Favia bowerbanki from Australia and a specimen (no. 3999) in the Berlin Museum 

 from Balum. A larger series of specimens is required in order to settle whether this is a 

 true species. 



23. Favia sp. ? 



1899. Astrma denticulata, Gardiner, Proc. Zool. Soc. London, p. 748, pi. 47, fig. 1. 

 1899. Astrcea pallida, Gardiner, Proc. Zool. Soc. London, p. 748. 



* " Remarks upon the Zoological Collection of the University of Glasgow," The Glasgow Naturalist, vol. ii, 

 no. 4, p. Ill, 1910. 



SECOND SERIES— ZOOLOGY, VOL. XVIL 15 



