167 



Arm and rare in Pinery Creeks. Several monstrous examples 

 were obtained in which two and three chambers were united to 

 form a rectilineal or nodosarian mode of growth. 



L. semistrlata, Williamson. The examples are truncate at base, 

 and in this way are intermediate with L. crenata^ Parker and 

 Jones. Moderately common. 



L. marginata, "Walker and Boys. Rather rare, North Arm 

 and Pinery Creeks. 



L. hicida, Williamson. Rather scarce. 



POLYMORPHINA, cVOrhigny. 

 P. lactea, Walker and Jacob. Rather scarce, North Arm. 

 P. lanceoJata, Reuss. Rather scarce, North Arm. 

 P. angnsta^ Egger. Rare on seaweed ground, North Arm. 



DiscOEBiXA, Parker and Jones. 

 The DisGorbinoe have a wide geographical distribution, and are 

 generally limited to shallow-water conditions. 



D. vesicidaris, Lamarck. Rare in North Arm and small 

 creeks. 



D. rosacea, d'Orbigny. Rare in small creeks near Pinery. 



D. dimidiata, Jones and Parker. Rare in North Arm. 



D. turbo, d'Orbigny. Rare in North Arm. Probably derived. 



D. valimlata, d'Orbigny. A hemispherical test with strong 

 limbation. Rare in North Arm. 



Truxcatulina, d^Orbigny. 

 T. lobatula. Walker and Jacob. Rare in North Arm and 

 Pinery Creeks. 



T, refidgens, Montfort. Rare in North Arm. 



RoTALiA. Lamarck. 



R. Beccarii, Linne Rare, but occurs in all positions where 

 dredgings were taken. Very characteristic of estuarine con- 

 ditions. 



PoLYSTOMELLA, Lamarck. 



P. striato-punctata, Fichtel and Moll. This is probably the 

 most characteristic estuarine form that exists among the fora- 

 minifera. It is found in almost all estuarine lists of species, and 

 often makes its way a long distance up stream. It is the com- 

 monest species in the Port River, and occurs on the muddy flats 

 of the North Arm in great abundance. It was also found in all 

 the other situations where foraminifera were noted higher up the 



