EXPLANATION OF PLATE 27 (XXVII) 



Figs. 1-10, X 15; Fig. 11, X 10; Figs. 12-15, X 15. 

 Figures 1, 2, 4-11. — Aschemonella scabra Brady. 



Figs. 1, 2, 4, 5, 7. Challenger Sta. 244, North Pacific. (2900 fathoms) 

 Figs. 6, 8-10. Challenger Sta. 323, South Atlantic. (1900 fathoms) 

 Fig. 11. Challenger Sta. 28?, North Atlantic. 

 Referred by Brady to Aschemonella catenata (Norman), described without a figure, as Astrorhiza catenata 

 by Norman in 1876. Brady, text p. 271, notes that Aschemonella scabra Brady, figured as the genotype of 

 Aschemonella by Brady in 1879, is the same as A. catenata (Norman). This view has been followed by Cushman 

 throughout his work on Recent Foraminifera, also by Earland (Discovery Repts., Vol. 13, 1936, p. 30), but 

 Hofker (Foram. Siboga Exped., Pt. II, 1930, p. 119) and Thalmann (Eclog. geol. Helv., Vol. 25, No. 2, 1932, 

 p. 299) refer these figures to A. scabra Brady. Hofker apparently does this in error since he places the earlier 

 (1876) name catenata in the synonymy of scabra (1879), and Thalmann does not cite any authority. Loeblich 

 and Tappan (personal communication, 1956) remark as follows, "Brady often gave wide limits to a species. 

 Examination of British Museum types show that A. catenata is a much smaller, delicate species, and has more 

 bulbous chambers. We regard them as distinct species." Although Brady had large amounts of material at his 

 disposal, including Norman's specimens, he did not recognize the existence of two species. His broad views on 

 species limits, however, as noted by Loeblich and Tappan, are evident throughout the Challenger Report, and 

 the view of Loeblich and Tappan is followed here. 

 Figure 3. — Aschemonella catenata (Norman). 



Valorous Sta. 8, lat. 62° 6' N., long. 55° 56' W., Davis Strait. (1350 fathoms) 

 This is one of Norman's original specimens, figured by Brady for comparison with Challenger specimens 

 which he originally referred to A. scabra, but later referred to A. catenata (Norman) in synonymy. 

 Figures 12-15. — Aschemonella ramuliformis Brady. 



Challenger Sta. 244, North Pacific. (2900 fathoms) 



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