FORAMINIFKKA IIEKON ALLEN AND EARLAND. 197 



502. Spirillina limhata. var. denticulata, Brady. 



Sj)irilliiia liiiiliiila. var. di'iiticidata, Brady, 1884. FC. [). 6.32. ])1. l.xxxv. fij,'. 17. 



Heron-Allen and Earland. I'.UL etc. FKA. IIH."). p. fi85. 



Station 2. 



Among the fine serie.s of -S. IwibaJn, at Station 2. are forms intermediate 

 between tliat species and Brady's variety ; every stage in tlie transition is represented. 



503. Spirillina margariiifera. Williamson. 



Spirilluiii iiKirgaiitifcm. Williani.son. 18.58, RFGB. p. 93, i)l. vii. fio-. 20-t. 



Heron-Allen and Earland. 1914, etc., FKA. 191.0, ]). G8.5. 



Stations 2, 4, 6. 



Very fine examples at Station 2, almost o(|iiallv good at Station (i. 



504. Spirillina drrorafa. Brady. 



SjiirlUiiiii (Irromtd. Brady. 1884. FC. p. 6.33. pi. Ix.x.xv. fios. 22-2."). 



Heron-Allen and Earland, 191 1, ete., FKA. 191.5, p. f)85. 



Stations 2, 3, 5, 20, 31. 48. 



A very handsome set of specimens. Imt iiowliere strictly tvpical. except at 

 Station 31. wliere they are very strong. At Stations 2, 3 and 5 the specimens 

 follow Brady"s type, Init the convolutions are more embracing on the upper surface, 

 and. when worn away, they exhibit strong crossbars which suggest a sub-division of 

 part of tlie tube into chamberlets. At Stations 26 and 48 some very large speci- 

 mens, which represent an intermediate form between S. decorata and S. /itber- 

 culata, the ujjper surface being more or less normal but tuberculate. and tlio 

 un(h^r surface lieing so strongly tuberculate that the convolutions are masked. In a 

 few of the examples the markings are almost equally .strong on the upper surface. 



505. Spirillina selseyensis, Heron-Allen and Earland. PL YII. iig. 3. 



Sjiin'Uiiia .schei/eii.^is, Heron-Allen and Earland, 1908, etc., SB. 1909. p. 440, ])1. xviii, fig.s. 6, 7. 

 {=restis Halkyard) Halkyard. 1919, BMB. p. 105, ])1. vi, fig. 6 : pi. vii, 

 fig. 8. ■ " 



Station 2. 



A single damaged .specimen at Station 2, which we refer to tlie above species in 

 preference to creating a new one, although it differs in some respects from the Selsey 

 specimens. The upper surface resembles S. limhata, var. denticulata. and the under 

 surface, a closely coiled spiral of rope. In the typical *S'. selseyensis the marginal 

 edge is furnished with a keel which cuts off the spiral marking from the outer 

 circumference of the organism. In the N.Z. specimen there is no marginal keel, 

 and the peripheral edge, as may be seen from our figure, is deeply and regularly 

 grooved. 



