52 McMaJion 8f Hudleston — 



diagnosis of Edwards & Haime : — " Corallum dendroidal . . . . 

 Calices somewhat unequal in size, often almost circular and with 

 rather a thick margin." "This coral bears great resemblance to 

 Favosites [^PacJiypora] cervicornis of the Devonian, and we were 

 even doubtful as to its being specifically distinct from it ; its calices 

 are, however, less unequal in size and almost circular." F. cristata 

 is said by these authors to occur likewise in the Devonian of the 

 Ural Mountains. 



In the specimen from Chitral a variation in the size of the calices 

 in the left-hand branch of the corallum is observed, and this 

 divergence of form may be held to favour the view as to its affinity 

 with Pachypora cervicornis, so common in the Devonian of Torquay. 



There is another specimen of Favosites (? Pachypora) in the 

 collection, which is less markedly dendroid, and in which the calices 

 are rather smaller ; but this, I think, may be referred to the same 

 species. 



2. Cyathophyllum cf. truncatum, Linnasus. (PI. II, Figs. 2, 3.) 



CyatJiophyllum truncatum: Brit. Foss. Cor. (Silurian), p. 284, pi. Ixvi, figs. ba-c. 



Edwards & Haime's diagnosis is true of specimens from Chitral 

 in the following particulars : — " Corallites regularly turbinate, not 

 very tall, and narrow at their basis ; walls covered with a thin 

 epitheca, and presenting strongly marked accretion ridges .... 

 central fossula large and rather deep .... septa (50 to 60) 

 very closely set, and thick towards the circumference, rather thin 

 towards the centre, rather unequal in length alternately ; the largest 

 reaching to the centre." On the other hand, there are minor points 

 where Edwards & Haime's diagnosis can scarcely be said to apply, 

 more especially as regards the flattening of the outer part of the 

 calice. 



The Chitral fossils greatly resemble specimens of C. truncatum 

 from the Wenlock Limestone of May Hill, more than they do any 

 Devonian species such as Hallia Pengellyi or C. helianthoides. CyatJio- 

 phyllum densum, Lindstrom (Eichthofen, China, Bd. iv, p. 65), may 

 approximate. 



There are five specimens in the collection which may be classed 

 under this head, besides fragments of what may be other species 

 of Cyathophyllum. 



3. Cyathophyllum cf. articulatum, Wahlenberg. (PI. II, Figs. 4, 5.) 



Cyathophyllum articulattcm : Brit. Foss. Cor. (SUiirian), p. 282, pi. Ixvii, figs. 1, la. 



The corallites in the Chitral specimens are all detached, and hence 

 taken singly do not compare well with the fine composite figures 

 of Edwards & Haime. In other respects their diagnosis is fairly 

 applicable. " Corallites sub-cylindrical, tall, presenting numerous 

 j)rominent accretion ridges, and covered with a thin epitheca, 

 through which the costse are apparent. Calices circular, shallow." 

 The state of preservation does not admit of further comparison. 

 There is a specimen in my own (British) collection from Dudley or 



