Manchester Memoirs, Vol. Ixii. (1917) 105 



260A. [Spirillina margaritifera, Williamson.] 



\_Spirillina margaritifera, Williamson, 1858, RFGB, p. 93, pi. 



VII, fig. 204. 

 6". margaritifera, Heron-Allen & Earland, 1914, etc. FKA, 1915,. 



p. 685.] 



261. [Spirillina selseyensis, Heron- Allen & Earland.] 



[Spirillina selseyensis, Heron- Allen & Earland, 1908, etc.,. 

 S.B. 1909, p. 440, pi. XV11I, figs. 6, 7.] 



261A. Spirillina restis, sp. nov. 



PL VI, fig. 6, and PL VII, fig. 8. 



Test consisting of a piano-spiral tube of about five con- 

 volutions, increasing slowly in width, tube not symmetrical in 

 section, consequently one lateral surface of the test is larger 

 than the other, the larger surface ornamented with oblique 

 elongate tubercles, the opposite surface without ornamenta- 

 tion except a septal limbation. Diam. .35 mm. 



This new species is very rare, and is perhaps only an 

 extreme development of Williamson's S. margaritifera. I have 

 found one or two specimens which tended in the direction of 

 Brady's S- incequalis, but, as the latter seems not to be a Spiril- 

 lina (see the apertures in Brady's figures), it has been thought 

 best to include them with the better-marked specimens in the 

 present species. The specimen figured on Plate VII only shows 

 slight traces of the oblique corrugations of the whorls. 



(This appears to be identical with our previously recorded 

 species 5". selseyensis from similar material from Selsey. Our 

 name having priority must stand.) 



262. Spirillina limbata, (Brady. 



Spirillina limbata, Brady, 1879, Quart. Journ. Micr. ScL, vol. 



XIX. pi. VIII, fig. 26, a, b. 

 Spirillina limbata, Brady, 1884, Chall. Rep., vol. IX. p. 632, pi 



LXXXV, figs. 18-21. 



Very rare. Three damaged specimens found in the beds 

 exposed between tide-marks near the end of the Quai des 

 Basques. 



