342 DISCOVERY REPORTS 



Placopsi!inaconfus(i,C^i^^T^^^{C- iQiS.etc, FAO, 1920, p. 71, pi. xiv, fig. 6), is based 

 on feeble specimens similar to those found in the Falkland area and figured by Brady 

 (B. 1884, FC, pi. xxxvi, fig. 3) and ourselves. But Cushman's figure, and to some 

 extent his description, appear to us to represent a distinctive organism which does not 

 occur in the Falkland area. It has however been found in some of the Discovery 

 material from the Antarctic area and will be dealt with by us in a subsequent report. 



Brady's fig. 3 does not in our opinion possess any specific points of difl^erence from 

 the typical P. ceuomana. It represents only a less robust form of growth such as might 

 be expected in a normally tropical species extending its range into colder seas. 



Sub-family TROCHAMMININAE 

 Genus Ammolagena, Eimer and Fickert, 1899 



99. Ammolagena clavata (Jones and Parker). 



Trochammina irregularis clavata, Jones and Parker, i860, RFAI, p. 304. 

 Webbina clavata, Brady, 1884, FC, p. 349, pi. xli, figs. 12-16. 

 Ammolagena clavata, Eimer and Fickert, 1899, AVF, p. 602 (674). 



One station: WS 225. 



Two typical specimens. Its absence from other stations is somewhat extraordinary. 



Genus Tolypammina, Rhumbler, 1895 



100. Tolypammina vagans (Brady). 



Hyperammina vagans, Brady, 1S79, RRC, etc., 1879, p. 33, pi, v, fig. 3; 1884, FC, p. 260, 



pi. xxiv, figs. 1-9. 



Tolypammina vagans, Rhumbler, 1903, ZRR, p. 277-8, fig. 125. 



Nine stations: 51 ; WS 73, 88, 92, 97, 98, 225, 243, 246. 



This species is generally extremely abundant in any material where stones or any 

 suitable surfaces of attachment occur. Often every little crevice in a pebble contains its 

 specimen. 



Genus Ammodiscus, Reuss, 1861 



loi. Ammodiscus incertus (d'Orbigny) (Plate VIII, figs. 18-20). 



Operculina incerta, d'Orbigny, 1839, FC, p. 49, pi. vi, fig5. 16, 17. 

 Spirillina arenacca, Williamson, 1858, RFGB, p. 93, pi. vii, fig. 203. 

 Ammodiscus incertus, Brady, 1884, FC, p. 330, pi. xxxviii, figs. 1-3. 



Eight stations: 388; WS 71, 76, 88, 93, 99, 215, 217. 



All the specimens are very small and far from typical, being rather roughly constructed 

 and almost grey in colour. The coils are seldom flat or so regularly convoluted as is 

 usually the case, and there appears to be a very distinct local form, which, while hardly 

 worth separation as a species, is intermediate between A. incertus and A. gordialis 

 (Plate VIII, fig. 20). The best series is at WS 217, other good ones at WS 76 and 93. 



