84 DISCOVERY REPORTS 



More generally distributed and more abundant than Ammodisciis incertus, from the 

 irregularly formed local variety of which it is often hardly separable. 



The typical gordialis in which the coiling of the tube is entirely irregular is found only 

 at Sts. 27, 30, 140, 149, WS 25, 27, 31 and 63, MS 14. At WS 63 the specimens were 

 highly polished owing to excess of cement, all others presenting the matt surface 

 characteristic of the genus in this area. The typical form also occurs at WS 33, in com- 

 pany with the local variation akin to A. incertus. The best specimens, both in numbers 

 and development, were obtained at this station. 



The local variety, in which the earlier convolutions are regularly coiled as in A. 

 incertus and the later convolutions very irregular, is found at all the remaining stations. 

 Sessile forins often occur, notably at WS 51. 



I have followed recent practice in assigning this species to Glomospira, but the 

 difficulty of separating many of the specimens from A. incertus convinces me that, so far 

 at least as Glomospira gordialis is concerned, the generic distinction has no real value. In 

 my opinion this also holds good as regards many old genera revived and new genera 

 created in recent years by systematists. 



The remarks as to the colour of Ammodiscus incertus hold good as regards G. gordialis 

 also. 



128. Glomospira charoides (Jones and Parker) (F 103). 

 Six stations: 151; 53^ 00' S, 34° 22' W; WS 334, 353, 521, 522. 



Singularly rare, one specimen only at each station, all very small except at St. 151 and 



WS 521. 



Genus Turritellella, Rhumbler, 1903 



129. Turritellella shoneana (Siddall) (Plate III, figs. 9, 10). 



Trochatnmina shoneana, Siddall, 1878, FRD, p. 46, figs, i, 2. 



Ammodiscus shoneanus, Brady, 1884, FC, p. 335, pi. xxxviii, figs. 17-19. 



TurritiUella shoneana, Rhumbler, 1903, ZRR, p. 283, fig. 135. 



Ammodiscus shoneanus, Heron-Allen and Earland, 1913, CI, p. 49, pi. iii, fig. 6; 1922, TN. 



p. no, pi. i, fig. 22. 



Turritellella shoneana, Cushman, 1918, etc., FAO, 1918, p. 102, pi. xxxviii, figs. 5-7. 



One station: 145. 



A number of specimens were found at St. 145, but none at any other station. This 

 may be due to the nature of the material (trawl-washings) and the shallowness of the 

 water, 26-35 m. 



All the specimens are of the minute form usually found in British gatherings and 

 identical with such. Both megalospheric and microspheric individuals occur, the 

 former being characterized by a globular proloculum almost equal in diameter to the 

 subsequent coil of chambers, which consequently has nearly parallel sides. In the 

 microspheric form, the proloculum is quite small and the test forms a slender cone. The 

 texture is finely granular owing to the small proportion of cement employed. Colour 

 light brown, fading into white at the oral extremity. 



