ANNIVERSARY ADDRESS OE THE PRESIDENT. 



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from the Old Red of Herefordshire ; this and Proricaris M'Henrici 

 of Baily form the only 2 new British genera introduced into the 

 Devonian fauna. Phillipsia Brongniartii is the only crustacean that 

 occurs in common in the Devonian and Carboniferous rocks ; it is the 

 Asaphus obsoletus and A. granuliferiis, Phill. ; so that, small as the 

 Devonian Crustacean fauna appears to be, it is nevertheless distinc- 

 tive. A. Bonier, Sandberger, Dalman, Brongniart, Richter, Minister, 

 Beyrich, Steining, Roualt, &c. on the continent, with Salter, Phillips, 

 Woodward, Jones, R. Etheridge, jun., and Baily in Britain, have all 

 greatly enriched our knowledge of the Devonian Crustacea. 



Bryozoa. — The Tubuliporidse through Oeriopora, the Retioporidse 

 through Fenestella, Hemitrypa, Polypora, Ptylopora, and Betepora, 

 and the Escharidae through Glaaconome, are represented through the 

 Devonian rocks by the above 7 genera with 11 species; all the 

 genera are equally Carboniferous, but only 4 species are common to 

 both formations — Oeriopora similis, Phill., Fenestella plebeia, M'Coy, 

 Glauconome bipinnata, Phill., and Poly pom laxa, Sandb. The Lower 

 Devonian possesses 2 species only, viz. Fenestella antiqua, also oc- 

 curring in the Middle and Upper, and Betepora repisteria, which is 

 also Middle Devonian. 6 of the 7 genera and 7 species are Middle 

 Devonian — Polypora, through its representative species (P. laxa), 

 being Upper and Carboniferous. 5 genera and 6 species are Upper 

 Devonian ; they are both South- and North-Devon forms — Oerio- 

 pora (Millepora) gracilis, Phill., Fenestella antiqua, Goldf., F. 

 prisca, Goldf., F. plebeia, M'Coy, Glauconome bipinnata, Phill., 

 and Polypora laxa. The known Devonian Bryozoan fauna (Euro- 

 pean, American, and British) consists of 26 genera and 115 species ; 

 of these we have only 7 genera and 11 species. These species 

 range through North and South Devon and South Cornwall ; they 

 are rarely well preserved and always difficult to determine. Critical 

 analyses of the species have been undertaken by Messrs. Shrubsole 

 and Vines, who in time will revise the entire group. 



Brachiopoda. — With the exception of the fishes of the Old Red 

 Sandstone (125 species) this is the largest group in the British 

 Devonian rocks. We should expect this when we know that no 

 less than 61 genera and over 1100 foreign species have passed 

 through the hands of European, American, and British zoologists and 

 palaeontologists, and all have been described ; of these 1100 species 

 only 116 are British ; and of the 61 known genera we possess 26. 

 Oalceola (1), Davidsonia (3), Cyrtina (4), Bensseleria (11), Camaro- 

 plioria (1), String <oceplialus (1), and Uncites (1) are the genera new to 

 Britain, none of which made their appearance in our area until the 

 Middle period of the Devonian deposits, the most marked and prolific 

 of the three horizons. With the exception of Cyrtina, which exhibits 

 4 species, each of these genera is represented only by 1 species. 

 Hall's genus Bensseleria yields 10 as the total value of the genus ; 

 but only 1 species occurs in Britain (Bensseleria stringiceps, Rom.) ; 

 8 of the rest are American, and 1 species is Coblentzian. I call 

 attention to these 7 genera because they are essentially Devonian ; 

 the remaining 19 appeared in the Silurian rocks, and lived on 

 through the Carboniferous. 



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