246 H. J. L. Gu^nj — Foraminifera of Trinidad. 



Nat. Hist., Sept. 1871, pi. ix, fig. 45), is another form of tbe sam& 

 species ; indeed, it is by those authors (p. 154) assigned to Msjtida. 

 The minute structure of the test is probably similar to that of other 

 Nodosarians, that is to say, minutely and closely tubulated. But the 

 appearance under the microscope is similar to that of Orhulina, as 

 figured by Carpenter (Introduction, pi. xii, fig. 8). What appear to 

 be large pores are probably the transparent shell-substance of the 

 tubercles. 



Other Nodosarians of the Naparima oceanic beds are worthy of 

 a notice. These are specially N. abyssortim, N. longiscata, and 

 N. arundinea. Neither N. longiscata nor N. arundinea are noticed in 

 the " Challenger " Eeport, but both are recorded from the London 

 Clay and Vienna Basin ; also from the oceanic beds of Barbados. 

 N. arundinea (PI. "VIII, Figs. 14, 15) consists of a long tube-like body 

 with occasional slight constrictions and inflations. In its general 

 form it resembles Bhabdammina, while N. longiscata resembles 

 Hyperammina. The shell-structure of both species is minutely and 

 closely tubulated as in other Nodosarians, and shows no sign of any 

 arenaceous condition. I have not access to any satisfactory figures of 

 either species. N. longiscata (PI. VIII, Figs. 12, 13) generally consists 

 of a sub-globular initial segment succeeded by one or two, rarely 

 three, extremely elongate segments, scarcely separated by a more or 

 less evident constriction. Some of the simpler forms recall certain 

 forms of Lagena vulgaris, although they cannot be mistaken for 

 Lagenai. It is possible that N. arundinea is really the same as 

 N. longiscata, but I have not been able to prove this. The specimens 

 of the former showing the nearest approach to the latter are some- 

 what like a thermometer-tube in shape. 



Nodosaria ahyssorum (PI. VIII, Figs. 8, 9) was described by Brady, 

 who in Chall. Rep., p. 504, says of it, " It is not by any means 

 certain that it really belongs to the genus Nodosaria, that it is not 

 rather a deep-sea variety of Sagrina." I am of opinion that it is 

 a Nodosaria, the polymucronate apex, by which character it is dis- 

 tinguished from all other Nodosarias, being in no way like the 

 apical portion of a Sagrina (Uvigerina) . 



Nodosaria abyssortim was found at Challenger Station 296, south- 

 west of Juan Fernandez, at a depth of 1,825 fathoms, and, so far as 

 I can ascertain, it is not recorded from any other locality. It is not 

 mentioned either by Brady or Chapman in their lists of Barbados 

 Fossil Foraminifera. It occurs in the Naparima oceanic beds, and 

 specimens in all respects similar to those figured by Brady (Chall. 

 Rep., pi. Ixiii, figs. 8, 9) are common. Indeed, that and N. hispida 

 are the two most abundant and easily recognized Nodosarias found 

 in these rocks, and it was owing to the frequency of their occurrence 

 that I called some of the beds Nodosaria beds. The non-occurrence 

 of JV. abyssortim in the Barbados oceanic beds is remarkable, as their 

 fauna is almost identical with that of the Naparima beds of Trinidad. 



In the identification of Reuss's species retrorsa, it appears to me 

 that Brady has not made use of his usual acumen. Brady's figure 

 (Chall. Rep., pi. Ixiii, fig. 7) represents what I take to be a slender 



