ORDOVICIAN AND SILURIAN BRACHIOPODA OF THE GIRVAN DISTRICT. 961 



(1). (2), 



(1). 



(1). 



(1),(2), 



(1) 



(1), 



(1), 



(1). (3), 



(1), (2), 

 (1), (3), (4), 



0)> (3), 

 (1), (3), 



Orthorhynchula sub-borealis (Dav.) [Rhynchonella sub-borealis]. 

 Rhynchotrema Lapworlhi (Dav.) [Rhynchonella Lapworthi]. 



„ shallochense (Dav.) [Rhynchonella shallockiensis]. 



,, ? girvanense (Dav.) [Rhynchonella girvanensis, Rhynchonella nucula?, var.] 



S P- 

 Rhynchotreta ardmillanensis (Dav., MS.) [Rhynchonella cuneata (pars), 1 Rhynchonella 

 Weaveri (pars)]. 

 ,, cuneata (Dalm.), var. [Rhynchonella cuneata (pars)]. 



Gamarotceckia decemplicata (Sow.) [Rhynchonella decemplicata (pars)]. 



,, llandoveriana (Dav.), var. npv. diversiplicata [Rhynchonella llandoveriana 



(pars)]. 

 ,, nucula (Sow.) 1 ? [Rhynchonella decemplicata (pars)]. 



,, sp. [Rhynchonella Wilsoni (pars)]. 



Zygospira orbis, sp. no v. 



„ 1 sp. 

 Protozyga carrickensis, sp. nov. 

 Atrypina Barrandei (Dav.) 1 

 Glassia compressa (Sow.). 



,, obovata (Sow.) [Glassia obovata]. 

 Clintonella, cf. vagabunda, Hall and Clarke. 

 Atrypa expansa, Lindstr., var. 



„ imbricata (Sow.) [Atrypa imbricata]. 

 ,, reticularis (Linn.) [Atrypa reticularis]. 

 Dayia cymbula (Dav.), var. nov. girvanensis [Merista cynibula]. 

 Dayia sp. 



Cyclospira 1 diversa, sp. nov. [Rhynchonella poitlockiana (pars)]. 

 Spirifer plicatellus, Linn., var. radiata, Sow. [Sp. plicatella, var. radiata]. 

 Cyrtia exporrecta (Wahl.) [Cyrtia exporrecta]. 

 Rhynchospira (Homoeospira) Bouchardi (Dav.), var. nov. mullocliensis. 



,, ( „ ) camreganensis, sp. nov. 



Nucleospira pisum (Sow.) [Nucleospira pisum]. 

 Whitfieldella angustifrons (M'Coy) [Meristella angustifrons]. 



,, nitida (Hall) var. 1 



Meristella, cf. Circe, Barr. 



„ sp. 



Gcelospira hemispherica (Sow.) [Leptocoelia hemispherica], 

 ,, scotica (M'Coy) [Atrypa? scotica]. 



var. 



Stratigraphical Distribution of Species. 



ORDOVICIAN. 

 Ballantrae Group. 



(5) Lingula crumenoides, sp. nov. 

 (5) Paterula balclatchiensis (Dav.) 1 

 (5) Acrotreta (or Acrothele) sp. 



Stinchar Limestone Group. 



(2) Obolus Maccullochi, sp. nov. 

 (1), (2) Lingula quadrata, Eichw. 



(1) Lingulasma 1 canadense (Billings ). 



