1 6 SiDEBOTTOM, Fovaminif era from the Island of Delos. 

 HAUERININ^. 



Articulina, d'Orbigny. 



Articulina sulcata, Reuss. (PI. 4, figs. 16, 17 ; 

 Section 5). 



Articulina sulcata (Reuss), Brady, Parker and Jones 

 ('88), p. 215, pi. 40, fig. II. A. sulcata (Reuss), Brady ('84), 

 p. 183, pi. 12, figs. 12, 13. A. sulcata (Reuss), Egger ('93), 

 p. 243, pi. 3, fig. 5. 



No. 5. Articidina sulcata, Reuss. x 75. 

 Transverse section of the test. 



This form as figured by Brady, and about which he 

 raises the question as to its being a distinct species, or 

 only the young form of one of the other species, is present 

 in considerable quantity. A few of the specimens with 

 apparently the same commencement, have another 

 chamber added, after the manner of A. sagra or A. conico- 

 articulata. The mouth is compressed (with the exception 

 of three specimens, in which it approaches roundness), and 

 it is a question if they should not be placed with A. sagra. 

 The form figured by Brady, Parker and Jones, under the 

 name A. sulcata comes very near to PI. 4, fig. 19, which I 

 have placed under A. sagra. It may be noted that near 

 the base of the final chamber of the specimens as repre- 

 sented in PI. 4, fig. 17, it becomes sometimes nearly round 

 in section, as in ^4. conico-articulata, the mouth remaining" 

 flattened. The Articulina gibbosula, d'Orbigny ('46), p. 282, 

 pl. 20, figs. 16-18, is almost similar to these. It is possible 



