104 CATALOGUE OF THE RECENT FOR AMFNIFERA OF 



in his collection specimens of the ribbed variety B. costata, 

 D'Orb., from the west coast of Scotland. 



Neither species is mentioned in the Monograph of Recent 

 Foraminifera of Great Britain. 



9. CASSIDULTXA, D'Orb. 



1. C. l^vigata, D" 1 Orb. Cassidulina laevigata. Eec. For. Gt. 



Br. PL VI, figs. 141, 142. 



Very rare. In dredgings 25 to 40 fathoms, off Holy Island. 



2. C. crassa, If Orb. Cassidulina obtusa. Eec. For. Gt. Bt. 



PI. VI, figs. 143, 144. 



A single specimen from 35 fathoms, Berwick Bay. 



The remarks upon Uvigerina apply equally to the genus Cassi- 

 dulina ; neither are "at home" on our coast, probably on account 

 of the shallowness of the water. 



10. DISCORBINA, P. $ J. 



1. D. globtjlaris, If Orb. Botalina concanierata (young). Pec. 



For. Gt. Br. PI. IV, figs. 104, 105. 



Very common. Often found growing attached to sea- weeds 

 and corallines. 



Professor Williamson erroneously figures this as the young of 

 an entirely distinct species. The fact, that whilst the so-called 

 young form (Discorbina globularis) is common in every stage of 

 growth, that which is figured as the matured shell (Pulvinulina 

 repanda) has never been found on our coast, would alone strongly 

 militate against the identity of the two forms. 



2. D. rosacea, D' Orb. Botalina Mamilla. Rec. For. Gt. Br. 



PI. IV, figs. 109-111. 



Small specimens are not uncommon in the deeper dredgings 

 both on the* Northumberland and Durham coasts. 



11. PLANORBTJLINA., D'Orb. 

 1 . P. Mediterranensis, If Orb. Planorbulina vulgaris. Eec. 

 For. Gt. Br. PI. V, figs. 119, 120. 



Very common, both in dredged and littoral sands. 



