650 MK. R. J. LECHMERE GUPPX ON SOME [NoV. 6, 



the Nodosaria from the Naparima beds of Trinidad I have ideu- 

 tified (rightly or not) with N. rugosa, D'Orb. Mr. Joseph Wright, 

 l\Gr.S., gave it as his opinion that it was a new species of Claim- 

 Una ; but the internal structure, including the hollow pillar, seems 

 to suggest a relationship to Ellipsoidma and Pleurostomella. 

 Prom the Naparima Microzoic beds, Trinidad. 



2. ELLiPsoiDiifA SUBNODOSA, n. sp. (Plate XLI. fig. 12.) 



Elongate, cylindrical, smooth, shining, generally tapering, 

 having 4-12 chambers. Aperture crescentic, with a hooked and 

 projecting lip and an internal hollow pillar. 



Notwithstanding the resemblance in shape to a Nodosaria, this 

 may generally be distinguished by its more regidarly cylindrical 

 shape, the separation between the chambers being less strongly 

 marked than in most Nodosarice. The aperture and interior 

 structure are more distinct marks of difference. The species 

 represents a close approach to Pleurostomella ; but the aperture is 

 not situated in a depression as it is in that genus, it is terminal or 

 nearly so. Further, in our new species the segments rarely show 

 a tendency to alternate as they do in Pleurostomella, though it is 

 to be observed that in one or two specimens there is an indication 

 of such a tendency near the apex. The aperture resembles that of 

 Ellipsoidhm ellipsoides, as represented by Brady's figure (Quart. 

 Journ. Geol. Soc. vol. xliv. 1888, pi. i. fig. 1). Some specimens of 

 Pleurostomella subnodosa come very close ; see, for instance, the 

 figures given by Burrows, Sherborn, and Bailey (Journ. K. Microse. 

 Soc. 1890, pi. viii. figs. 27-30). The shape varies from almost strictly 

 cylindrical to subclavate and tapering. The texture is usually very- 

 close and fine and rather waxy-shining ; but in what appear to be 

 old specimens the surface becomes very finely roughened and seems 

 to put on an arenaceous appearance. In this respect it makes an 

 approach to Stilostomella rugosa (described above), whose aperture 

 is somewhat similar. 



Ellipsoldina subnodosa is a lengthened-out form of the type I 

 have indentified as E. exponens, Brady, MS. (see Brady's remarks, 

 quoted by Jukes-Browne and Harrison, Quart. Journ. Geol. Soc. 

 1892, p. 196). It is found in the Tertiary Microzoic rocks of 

 Naparima, Trinidad. 



3. Ellipsoidina exponens, Brady, MS. (Plate XLI. fig. ]3.) 



A smooth ovoid Foraminifer, having a crescentic aperture with a 

 projecting hooked lip. The aboral end is generally smaller than 

 the other extremity, and shows several successive chambers divided 

 by very slightly sunk sutures. 



It has the internal structure of Ellipsoidina (Ann. & Mag. Nat. 

 Hist. ser. 4, vol. i. (1868), p. 333, pi. xiii.), aud I believe it to be 

 identical with the form so named by H. B. Brady, in Jukes-Browne 

 and Harrison's paper on the Geology of Barbados (quoted under 

 the foregoing description of E. subnodosa). It runs into forms near 

 E. ellipsokles ; indeed the three species {E. subnodosa, E. ea-ponens. 



