198 



Luciua despecta, Phil. Pecten clathratus, Ruem. 



II Bellona, Mor. and Lye. n lens, Sow. 



II rotundata, Boem, n vagans, Sow. 



Mytilus furcatus, Goldf. Placunopsis Jurensis, Roem. 



II sublsevis, Sow. « socialis, Mor. and Lye. 



II imbricata, Sow. Tancredia axiniformis, Phil. 

 Nucula variabilis, Sow. « brevis, Lye. 



Opis luniilatus, Sow, n planata, Lye, 



II similis, Soi.u. Trigonia costata,, Sow, 

 Ostrea acuminata, Soiu. n Goldfussii, Miinst, 



II gregarea, Soiu. « Moretonis, Mor. and Lye. 



II rugulosa, Mor, and Lye. 



Bkachiopoda. 

 Terebratula perovalis, Sow, Rhyncbonella concinna, Soiv, 



ECHINODEEMATA. 



Acrosalenia hemicidaroides, Wr, Nucleolites clunicularis, Llhwyd, 



•I spinosa, Ag. Hyboclypus caudatus, Wr, 



Hemicidaris Luciensis, d' Orh, Pygaster somisulcatus, Phil. 



Pseudodiadema depressvun, Desor, Clypeus MuUeri, Wr. 



Dr. LtcetTj* whose critical knowledge of the specific forms 

 of this district is unsurpassed, states that the Great Oolite of 

 Minchinhampton has produced : — 



Species. Species. 



Gasteropoda ... 165 f of whicli are found in ) Gasteropoda ... 20 

 Conchifera ... 171 ( the Inferior Oolite i Conchifera ... 45 



336 65 



So that twenty-two per cent, are common to both formations 

 in the Cotteswolds generally. The 336 species represent eighty 

 genera of Gasteropoda and Conchifera, and of this number 

 only nine genera occur, which are not found also in the 

 Inferior Oolite : we may say, therefore, in general terms that 

 of the fossil MoUusca collected from the shelly beds of the 

 Great Oolite at Minchinhampton, seventy-eight per centum are 

 proper to that formation, and twenty-two, species common to 

 it and the Inferior Oolite. 



• The Cotteswold Hills Hand-book, p. 3. 



