The Carboniferous Limestone of West Cumberland. 129 



D. is abundant in the Rough Beds and persists upwards to the top of 



the Fourth Limestone. 

 The highly specialized form D. splendens, Nicholson and Thomson, occurs 



in the Junceum Beds. 

 D. muirheadi, Nicholson and Thomson, is highly characteristic of the 



Second and First Limestones. 

 Clisiophyllum. 



Occurs only in the Junceum Beds and is represented by forms similar to 



C. subimbricatum, Thomson, and C. keyserlingi, McCoy. 



KONINCKOPHYLLUM. 



K. 9, Vaughan, enters in the Sixth Limestone and is abundant in the Fifth 



Limestone. 

 The form K. majnificum, Thomson and Nicholson, occurs in the Fourth 



Limestone. 

 A particular specialized form.iT. sp.,is characteristic of the First Limestone. 



MiCHELINIA. 



This genus is represented only by a small form, M. tenuisejita, McCoy, 

 occurring at one horizon, the Junceum Beds. 



LiTHOSTROTION. 



L. {hematopfiyllicm) minus, McCoy, occurs in great abundance in the Seventh 

 Limestone. 



L. Phillijjsi, Edwards and Haime, is abundant near the top of the Seventh 

 Limestone. 



A large prismatic form, cf. L. aranea Phill., is abundant in the Fifth Lime- 

 stone. 



L. junceum (Flem.) and L. Portlccki, Edwards and Haime, range from 

 the Fifth Limestone to the top of the Third Limestone. These species, 

 together with L. McCoyanum, Edwards and Haime, are especially 

 abundant in the Junceum Beds. 



The Lithostrotions take on a diphyjihylloid habit towards the tojj of 

 the Fourth Limestone, Diphyphyllum lateseptatmn, McCoy, D. concinnum, 

 Lonsdale, and D. interruptuni, Thomson, being present. There is a 

 remarkable rarity of Lithostrotion in the First Limestone, this genus 

 being only represented by a small, straggling, diphyphylloid variety. 



Orionastroia ensifer, S. Smith, is particular to one horizon, viz. at the base 

 of the Saccammina Beds. 



LONSDALEIA. 



The various species and forms of this highly sj^ecialized coral have been 

 described by Dr. Stanley Smith, ^ and the forms described by him can 

 be recognized with ease. The vertical distribution in the West 

 Cumberland Limestones agrees with his account of the ontogeny and 

 phylogeny of this genus. 



Lons. duplicata melmerbiensis, S. Smith, is abundant in the Fifth Lime- 

 stone. 



Lons. duplicata duplicata, Martin, occurs in the White Beds. 



Lons. floriformis (Martin), mutation crassicomis, S. Smith, enters in the 

 Rough beds, where it rajiidly reaches its maximum and per.sists to the 

 top of the Fourth Limestone. 



Lons. duplicata alstonensis, S. Smith, occurs at the top of the Fourth 

 Limestone. 



Lons. floriformis laticlavia, S. Smith, is sjjecial to and highly characteristic 

 of the First Limestone. 



AULOPHYLLDM. 



Aulophyllum makes its first apj^earance in an immature form in the Rough 



Beds of the Fourth Limestone. 

 A. fangites (Fleming), mutation Cumbriensis, S. Smith, occurs at the top 



of the Fourth Limestone. 

 A. fungites (Flem.), muta.tion pachyendothecum, S. Smith, is characteristic 



of the First Limestone. 



1 Op. cit, 

 VOL. LIX. — NO. III. 9 



