Foramlnifera of the River Dee. 



41 



in the "test," especially in the representatives of the Milioline 

 genera, its place being supplied by the " chitinous " or reddish- 

 brown horny-looking substance which seems to form the base 

 of the shell in all the Miliolince. 



It is interesting to compare the Rhizopodal fauna of these 

 two western estuaries, the Clyde and the Dee. Of the total 

 number of forms met with, sixty -nine are common to both 

 rivers ; seventeen species are found in the Clyde which have 

 not been found in the Dee, and, on the other hand, thirty -two 

 have been found in the last-mentioned river which do not 

 appear in Mr. Robertson's catalogue, as follows : — 



Foramlnifera found in the Firth of 

 Clyde not occurring in the estuarxj 

 of the Dee. 



CorDuspira foliacea. 

 Triloculina Brono'niartii. 



Spiroloculina excavata. 

 Lituola nautiloidea. 

 Valvulina austriaca. 

 Lagena distoma. 



lagenoides. 



hexagona. 



JefFreysii. 



striato-punctata. 



Nodosaria pyrula. 

 Dentaliua pauperata. 

 Vao-inulina leoumen. 



Polymorphina tubulosa. 



Bulimina aculeata. 



Tinoporus lucidus. 



Polvstomella arctica. 



Foraminifera found in the estuary 

 of the Dee not occurring in the 

 Firth of Clyde. 



Cornuspira involvens. 



Quinqiieloculina Candeina. 

 pulcliella. 



Lituola fusiformis. 



Lagena striata, var. gracilis. 



ornata. 



lucida. 



aspera. 



Nodosaria radicula. 

 Dentalina guttifera. 



Margimdina raphanus. 



glabra. 



Polymoi-pliina oblouga. 



Thouini. 



fusiformis. 



concava. 



gibba, var. jequalis. 



Uvigerina angulosa. 



pygmsea. 



Textularia pygmsea. 



diflformis. 



agglutinans. 



Verneuilina spinulosa. 

 Bulimina elegantissima. 

 Bigenerina digitata. 

 Spirillina margaritifera. 



vivipara. 



Cassidulina laevigata. 



Truncatulina refulgens. 

 Pulvinulina auricula. 

 repanda. 



Noniouina umbilicatula. 



