BUFFALO SOCIETY OF NATURAL SCIENCES 1 63 



of the Greenock Water. From the sand greywackes and greenish 

 shales E. N. E. of Waterhead the following fossils are recorded (215, 

 ' 576): 



Slimonia acuminata (Salt.) 



Beyrichia kloedeni (M'Coy) 



Dictyocaris sp. 



Spirorbis lewisi (Sow.) 



Goniophora cymbaeformis (Sow.) 



Modiolopsis complanata (Sow.) 



M. nilssoni (His.) 



Orthono*a impressa (Sow.) 



0. rotundata (Sow.) 



O- solenoides (Sow.) 



Platyschisma helicites (Sow.) 



Following upon the highest of the Ludlow green flaggy and sandy 

 greywackes there is in many localities a conglomerate of varying thick- 

 ness conformable, so it is stated, upon the Ludlow. In the Lesma- 

 hagow inlier, however, this conglomerate is absent. On the north- 

 west slope of the anticline the transition beds are exposed in many 

 places showing the change from greywackes to cross-bedded red and 

 yellow sandstones, 1300 feet thick, and constituting subdivision 8. 

 Overlying this is a group of strata, about 100 feet in thickness, con- 

 taining the very important fish-band. Sections along the Dippal 

 Burn and various streamlets emptying into the Glengarel and Kype 

 Waters show the succession. The fish-band itself is only from 12 

 to 15 feet thick, comprising an alternating series of brown flaggy 

 carbonaceous shales and green mudstones. It is in the former that 

 the fishes and eurypterids occur, but no organic remains have been 

 found in the mudstones. There are many sections from which the 

 fish and eurypterids have been obtained, but two will suffice to show 

 the nature of the fauna. Near the head of Dippal Burn there have 

 been obtained (215, 578): 



Eurypterus dolichoschelus (Laurie) 



Ceratiocaris sp. 



Lanarkia spinulosa (Traq.) 



L. horrida (Traq.) 



L. spinosa (Traq.) 



Thelodus scoticus (Traq.) 



Birkenia elegans (Traq.) 



