. Bulletin of the British Museum (Natural History). Zoology . 64 J. R. HAYNES at the exterior, increasing slowly in size as added, subround in section; sutures distinct and impressed; wall of agglutinated silt grains about 10 microns in diameter, with occasional larger ones, apparently organically cemented to an inner calcareous layer; aperture large, almost equal to the chamber diameter, truncating the apex with marked, rounded lip, tooth at inner border with thin stem and flat tines. Dimensions. Length 071 mm, maximum width 0-43 mm, thickness 0-31 mm. Material. More than 25 spec
. Bulletin of the British Museum (Natural History). Zoology . 64 J. R. HAYNES at the exterior, increasing slowly in size as added, subround in section; sutures distinct and impressed; wall of agglutinated silt grains about 10 microns in diameter, with occasional larger ones, apparently organically cemented to an inner calcareous layer; aperture large, almost equal to the chamber diameter, truncating the apex with marked, rounded lip, tooth at inner border with thin stem and flat tines. Dimensions. Length 071 mm, maximum width 0-43 mm, thickness 0-31 mm. Material. More than 25 specimens. Variation. The chief variation is towards flattening at the periphery with the production of subquadrate chamber shapes, the angles, however, remaining rounded, as shown in Text-fig. nos 1-4. Some specimens also show a tendency to irregular coiling (PI. 7, fig. 1) with the final chamber wrapping over the apex, or sometimes not reaching it. Specimens occur up to 1 mm in size. Depository. () Slide 1970 : 11 : 26 : 76-79. Stub 1970 : 11 : 26 : 754. Section 1970 : 11 : 26 : 470. Provenance. Specimen described and irregular specimen shown by stereo- scanner photograph, CB 8. Specimen illustrated by text figures, CB 651. Remarks. Jean & Yolande Le Calvez (1958) after examination of type material were able to re-illustrate Q. asp era and to show that N. Atlantic references to Q. agglutinata Cushman, at least, are synonymous. Cushman's type from off Alaska appears to be different with very broad, angled chambers and rather small Fig. 15, 1-4. Quinqueloculina aspera, variety with subquadrangular chambers. 1, frontal view showing four chambers; 2, rear view; 3, edge view; 4, apertural Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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