166 



YiROULiXA, dOrhigny. 



Y. Schreihersiana^ Czjzek. A widely-distributed form both as 

 to localities and depths. Rather scarce in North Arm. 



BoLiviNA, d'Orhigny. 



B. jnvnctata, d'Orbigny. Found in all parts of the world, and 

 at all depths. Very common on muddy bottoms, North Arm. 



B. textilarioides, Reuss. Sliorter than the preceding, with in- 

 flated chambers arranged in textularian order. Distribution less 

 general than the preceding, and mostly confined to warm seas at 

 moderate depths. Common on muddy bottoms, North Arm. 



B. decussata, Brady. A few examples occur which have ap 

 parently intermediate cliaracters of the present species and 

 B. reticulata, Hantkin. Many specimens show^ a regular reticula- 

 tion — more regular than is the case with B. reticulata. Mr. 

 Brady notes the presence of similar intermediate characters in 

 examples dredged between Cape of Cood Hope and Kerguelen. 



B. tortuosa^ Brady. One or two specimens exhibiting a twisted 

 form of growth were obtained from the seaweed bottom. North 

 Arm, and have with some reservation, been classed with this 

 species. 



Lagena, Walker and Boys. 



The Lagena are amongst the most widely-distributed of the 

 foraminiferal types. As a rule they seem equally at home in hot 

 and cold climates, and at all depths. A few of the species have 

 a more restricted range, winch will be noted in specific reference. 

 AYith two exceptions the following species were found limited to 

 the North Arm ; but as they prefer muddy bottoms, and the 

 dredgings in other areas were chiefly on sandy ground, their rarity 

 in the material gathered higher up the stream may have arisen 

 from this cause. 



L. J avis, Montagu. Moderately common. 



L. clavata, d'Orbigny. Rather scarce. 



L. graciUima, Seguenza. The most common form of the genus 

 in the Port River. 



L. distoma-margai-itifera, Parker and Jones. An ornamented, 

 distomatous foraminifer, which is only known as an Australian 

 species. Two or three examples noted. 



L. gJohosa, Montagu. Rather scarce. Amongst the specimens 

 of this form a duplex example with single orifice occurred. 



L. striata, d'Orbigny. A form which is more restricted to 

 shallow water than many of its congeners. Common in North 



