434 



Mr. T. Davidson. On Brachiopoda. 



[May 23, 



Depths in fathoms 

 hitherto ascertained. 



200 to 



250? 



Cistella Schrammi. Crosse. 



30 





43 



var. rubrotincta. 



30 





300 



Thecidium Mediterranean. Risso. 



60 







„ Barretti. Woodward. 



650 





1,443 



Atretia gnomon. Jeffr. 



10 





690 



Rhynchonella psittacea. Omelin. 









„ Sicula. Seq. 



15 



» 





j, nigricans. Sow. 



150 







„ „ var. pixidata. 









M.S. 



\") 







/~i „ • TT7" 7 T 



„ Urayi. Woodtvard. 



48 







,, lucida. Gould. 









Teetenteeata. iTm?- 



3 



to 



808 



Crania anomala. Mull. 



71 







,, Japonica. Ad. 



Ball. 



Willemoes Suhm 



Low water 

 6 



5 to 9 



6 



6 



(?) 



17 „ 49* 

 690 „ 2,400* 



(?) ? 

 Shore, low water* 

 Shore to 7 fms. 



(?) 



(?) 



7 ? 

 10 



(?) 

 10 

 7 



(?) ? 

 Shore to 7 fms. 

 Shore to 7 fms. ? 

 Shore 



(?) ? 

 Tidal mud flats at lowish 1 

 water. J 

 7 to 60 

 Low flats and lowest water 

 17- ? 



„ Suessi. Reeve. 

 Discina striata. Schumacher. 



„ (Discinisca, Dall) lamellosa. Brod. 



„ ,, lsevis. Low. 



„ „ Cumingi. Brod. 



„ ,, Antillarum,. D'Orb. 



„ „ stella. Gould. 



„ „ Atlantica. King. 



„ tenuis. Sow. 

 Lingula anatina. Lam. 



„ exusta. Reeve. 



„ hians. Swainson. 



„ hirundo. Reeve. 



„ jaspidea. Ad. 



„ lepidula. Ad. 



„ Reevi Dav. = ~L. ovalis. Reeve, 

 smaragdina. Ad. 



„ Adamsi. Dall. 



„ affinis. Hancock. 



„ tumidula. Reeve. 



,, Murphiana. King. 

 Glottidia Antillarum. Reeve. 



„ Audebarti. Brod. 



„ Palmieri. Dall. 



„ albida. Hinds. 



„ pyramidata. Stimpson. 



,, semen. Brod. 



In 1852 I published in the 'Annals and Magazine of Natural 

 History' a sketch of a classification of recent Brachiopoda based 

 upon internal organisation, giving a list of all the recent then known 

 species. Similar and revised lists were subsequently published in 1859 

 by Professor E. Suess, in 1861 by Lovell Reeve and myself, and in 



