164 



*S'. limhata, d'Orbigny. A few examples occur in North Arm- 

 dredgings which show a feeble development of limbation in the 

 outer chambers. 



*S'. grata, Terquem. Ornamented with fine longitudinal striae. 

 A common form in warm and shallow seas. A doubtful occur- 

 rence. 



CoRNUSPiRA, Scliultze. 



C. iiivolvens, Reuss. Small and semi-translucent examples, not 

 uncommon on muddy banks, North Arm. 



Reophax, Montfort. 



R. nodulosa, Brady. A long and tapering foraminifer of 

 arenaceous build. Chambers numerous, and of pyriform shape. 

 This is one of the most interesting finds in the present researches, 

 for with one or two exceptions on the coasts of Britain (in- 

 cluding the Frith of Clyde and the estuary of the Dee), it has 

 an exclusive deep water record, going down to 2,950 fathoms, 

 and has been dredged from the Arctic and Antarctic seas. The 

 local examples are relatively small, not exceeding one-sixteenth 

 of an inch. In the Port River examples, the chambers are very 

 numerous, in some specimens not less than seventeen, and are 

 more angular and constricted at the sutures than is shown in Mr. 

 Brady's figures. The shape of the chambers is indeed exactly 

 that shown by INFr. Brady's Reoj^hax guttifera, whilst the remain- 

 ing features of the test are those of the species under which I 

 have classed the objects. It would appear therefore that the 

 slight distinctions that separate the two may only depend on 

 local variations and are interchangeable. From Mr. Brady's des- 

 criptions I infer that the test, as known to him, was rigid, whilst 

 those obtained from the Port River are flexible, suggestive of a 

 chitinous membrane lining the inner surface of the shell. 

 Moderately common on seaweed ground, and rare on mud bot- 

 toms. North Arm. 



i?. scorpiurus, Montfort. Rare on sandy ground. Pinery 

 Creeks. 



B. findens, Parker. A few straight and somewhat coarsely 

 arenaceous foraminifera, having apertures at both ends, have 

 been referred to this species, as well as a rather fine example 

 with bifurcation at each end. Mr. Brady mentions a similar 

 example of double bifurcation. A very rare species, only known 

 hitherto from Gulf St. Lawrence and the estuary of the Dee. 

 Rather scarce on sandy bottoms, Pinery Creeks. 



