﻿170 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Feb. 5, 



List of some of the Silurian Fossils of Ayrshire. 

 By J. W. Salter, Esq., F.G.S. 



[The comparative abundance of the species is indicated by the 

 number of asterisks.] 



1 . Lowest Beds, — Limestone. (No. 3 of the Sections and Map.) 



Aldeans Limestone. 



Maclurea, new species. See description, p. 1 76. Pl.VIII. fig. 7. ***** 

 Murchisonia , sp. 



Cytheropsis, n. sp. M'Coy's list in Rep. Brit. Assoc. 1850, Trans. 

 Sect. p. 107. 



Bogang, or Bug an, Knockdolian. 



Asaphus (Isotelus), tail (probably the same as that found by Prof. 



Nicol in Peebleshire) . Pl. VIII. fig. 2. 

 Illcenus latus, M'Coy (probably I. Bowmanni compressed). 

 Orthis calligramma, Dalm., the variety virgata, Sow. Pl. VIII. fig. 4 , 

 confnis, Salter. This resembles some of the Russian species. 



Pl. VIII. fig. 5. ***** 

 Maclurea magna, Hall, is quoted by M'Coy from this locality ; we 



have small specimens of apparently the same species. 



Craig Neil, near Colmonel. 

 Maclurea, the new species above mentioned. ***** 



Craig Head Limestone. 



Cheirurus (Amphion) gelasinosus, Portlock, sp. Pl. VIIL fig. 1. 



Heliolites (Palceopora) favosus, M'Coy, sp. 



Favosites alveolaris, Blainv. sp. 



Petraia (Turbinolopsis) elongatal, Phill. sp. 



Encrinite stems, very abundant. 



Terebratula , sp. Probably a Canadian species. Pl. VIII. 



%. 3. 



Orthis elegantula, Dalm. 

 confinis, Salter. 



Leptcena or Strophomena, one or two species, imperfect. 

 Pleurorhynchus dipterus, Salter. Pl. VIIL fig. 6. 



The Maclurea macromphala, M'Coy, a species we have not seen, 

 occurs also here in plenty. 



2. Conglomerate and Shelly Sandstone Series. 

 (No. 2 of the Sections and Map.) 



Conglomerates of Cuddy stone Glen. 



Encrinurus punctatus, Wahl. sp. Pl. IX. fig. 4. *** 

 Fenestella. 



Petraia elongata, Phill. sp. ? **** 



