Stewart — List of Estuarine Clay Fossils. 35 



Mya arenaria. Frequent, but only in the most recent portion of the 

 bed. 



Mya truncata. Plentiful throughout ; specimens very fine, and some- 

 times with the siphonal tubes preserved. 



Mya binghami, Sphcenia Binghami, F. & H. In the Larne Lough de- 

 posit, very rare. 



Panopea plicata, Saxicava rugosa, young? F. & H. Plentiful at Bel- 

 fast in one narrow zone of the clay bed. Not yet found living on 

 the Irish coasts. 



Saxicava rugosa. Larne Lough deposit, rare. 



Saxicava rugosa var. artica. Belfast bed, rare (Grainger). 



Gastroch^ena dubia, GastrochcEtiia modiolina, F. & H. " Two portions 

 of the curious flask-like tubes of this species were found in the de- 

 posits" (Grainger). 



Pholas Candida. Perfect shells imbedded in numbers at the base of the 

 zone of Thvacia convcxa, and forming a line of demarcation between 

 that zone and the Scrobicularia bed. 



Pholas crispata. In the clay where they had lived in some numbers ; 

 the specimens are very large, many of them being nearly double the 

 usual dimensions of living examples. They occur only at the base of 

 the Thracia convexa bed. 



Teredo Norvegica. The calcareous tubes of this "ship worm" are not 

 rare in the clay ; complete specimens now in the Belfast Museum 

 were dug up while making sewers in the streets of the town. 



Creusia verruca. Belfast deposit, (Grainger). 



Ctthsre albo-maculata. Belfast bed, rare. Not rare in the Larne 

 Lough deposit. 



Pectinaria belgica. Belfast deposit, (Grainger.) 



Serpula triquetra. Belfast Estuarine Clay, on shells. 



Serpula vermicularis. In the Belfast Clay, rare. 



Terebella conchilega. Belfast bed, (Grainger.) 



POLYMORPHINA LACTEA. Bare. 



Polymorphina gibba, Var. czqualis. Rare. 



Planorbulina mediterranensis. Very rare. 



Polystomella crispa. Belfast and Larne bed, very abundant. 



Quinqueloculina bicornis. Belfast and Larne beds, scarce. 



Quinqueloculina seminulum. In great abundance. 



Rotalia beccarii. Extremely abundant, Belfast and Larne Lough . 



