106 Proceedings of the Royal Irish Academ//. 



BKACHIOPODA. 

 Chonetes laguessiana, de Koninck. PI. v., fig. 2. 



This species occurs a good deal dwarfed ; the different individuals 

 show considerable variation in the strength of the ribs. 



Locality — Upper marine band, Puffing Hole, Kilkee. Horizon = 

 Millstone Grit. 



Productus semireticulatus, Martin. 



I think that there can be no doubt of the true affinity of these 

 specimens from Kilkee, though they are much crushed. 



Locality — Upper marine band, Puffing Hole, Kilkee. Horizon = 

 Millstone Grit. 



LAMELLIBRAIS^CHIATA. 

 Pterinopecten papyraceus, Sow. sp. ^ PI. v., fig. 3. 



This is a very well-known shell which occurs first at the base of 

 the Pendleside series, and recurs at intervals to a point high up in 

 the Coal Measures. 



Localities — Ireland. The base of the shale series above the Car- 

 boniferous Limestone at Lisdoonvarna and Foynes Island (Horizon 

 of the Pendleside series). Upper marine band, Puffing Hole, Kilkee 

 (Horizon of Millstone Grit series). 



Pseudamusium fibrillosum, Salter sp. PI. v., fig. 4. 



I obtained a small slab at Lisdoonvarna, with several specimens of 

 l)oth valves of Salter's shell. In England, this species ranges from 

 the Pendleside series to the Coal Measures. In Ireland, the Geological 

 Survey obtained specimens from Slieve Carna, Co. Mayo. 



Locality — Lower beds of the Upper Limestone Shales, Lisdoon- 

 varna, = Horizon of Pendleside series. 



Posidonomya membranacea, M'Coy sp. PI. v., fig. 5. 



This shell is very abundant in shales some few feet above the 

 limestone at the water-sink of the River Fergus, north-west of Corofin. 

 The majority of the specimens were not full-grown. M'Coy's type 

 came from Skenies or Rush, in beds of what I consider to be the 

 equivalents of those in Co. Clare which contain this fossil. 



Locality — Bank of River Fergus, at water-sink north-west of 

 Corofin, = Horizon of Pendleside series. 



