480 REPORT— 1873. 



the genus Zaplirentls. Figs. 8 and 27 represent a new genus ; they are from 

 Fifeshire. Pig. 8 may possibly be determined as a distinct species. Fig. 7 

 belongs to the same group, and will form another species. These forms are 

 readily distinguished from all other corals belonging to this period by the 

 granular costae. 



Fig. 26 is closely allied to the genvLsLopJiophyllum ; but it differs in structural 

 characteristics from the species described by Prof. M'Coy in the ' Ann. of Nat. 

 Hist.,' 2nd series, vol. vii. p. 167, and in ' Brit. Paleeont. Fossils,' p. 90, 1851. 



Figs. 23, 40, 42, and 43 are very much alike in external aspects ; and it is 

 only from transverse sections that they can be determined as belonging to 

 distinct species. The other forms figured in this Plate require careful com- 

 parison before we can determine to what species or even genera they belong. 



Plate III. contains thirty-three figures, representing twelve varieties of the 

 genus Zajphrentls. 



Fig. 1 is Zaphrentis EnnisTcUleni ; and figs. 2, 3, 3 A, 3 B, and 3 C repre- 

 sent the same coral cut into five different sections, to show the structural 

 characteristics in the different stages of development. 



Fig. 5 is Zaphrentis Edwardsiana of De Koninck, Fig. 14 is Zaphrentis 

 Oaerangeri, E. & H. 



The internal structures of the other forms upon this Plate have not been 

 figured before, and therefore we deem it prudent to say nothing about them 

 until they have been more carefully and closely examined. At some other 

 time we may return to them, 



Plate IV. represents forty-three species. Figs. 1 to 6 represent varieties 

 of Amphxus and Zaphrentis. Figs. 3 and 4 have a striking resemblance 

 externally, but in internal structure they re2)resent two distinct genera, viz. 

 Amplexus and Zaphrentis ; and this fact confirms the statement made last 

 year, that we cannot rely upon external aspects for purposes of specific 

 identification. 



Figs. 14, 15, and 26 belong to the genus Lophophyllum. These three forms 

 have characteristics sufiicient to warrant us in classifying them as distinct 

 varieties. 



Fig. 28 belongs to the same genus, but differs from the others in having 

 two of the primary septa passing into nearly the centre of the calicular 

 cavity, and terminating subreniformly at the inner extremity. 



Fig. 21 C is Heterophyllia LyeUii, nat. size. Fig. 21 is the same, magni- 

 fied ; 21 A is a transverse, and 21 B a longitudinal section of the same. 



Fig. 3G is Heterophyllia grandis. This is the first time that this form has 

 been recorded from Scotch strata. Fig. 36 A is a longitudinal section of the 

 same, showing the internal structure. Figs. 36 B, 36 C, and 36 D are trans- 

 verse sections, exhibiting structural characteristics at different stages of 

 development. 



Fig. 37 is a new species of the same genus. 



Fig. 38 is Heterophyllia anyulata, while figs. 38 A and 38 B represent 

 the structures in longitudinal and transverse sections. 



Figs. 39, 39 A, and 39 B have well-marked specific distinctions. They 

 must represent forms which differ from the other species of this genus. The 

 septal arrangement is quite distinctive. It is certainly a new species. We 

 propose to name it Heterophyllia Phillipsii. 



Fig. 40 represents the external aspects of Heterophyllia mirahilis, nat. 

 size. This is the typical specimen that Dr. Duncan described in the ' Trans- 

 actions of the Eoyal Society' (1867, p. 643). Fig. 40 B is the same, magni- 

 fied. This species is distinguished from the other species by a series of 



