694 MESSES. E. IIEEON- ALLEN AND A. EA ELAND ON THE 



12 Stations. 



Occurs at most of the Stns., but only at a few in any abundance or marked 

 development. Very rare and small at Stns. 4 and 5 — rare, but large, at Stn. 6. The 

 best specimens were found at Stns. 11, 12, and 1 X, at all of which it occurred iu 

 maximum numbers. At Stn. 11 the individuals were very large and some of them 

 shoM'ed signs of passing into D. glohularis. At Stn. 12 specimens were well developed 

 and plentiful, at Stn. '?X it was common both free and attached. 



351. DisCOrMna gloMlaris (d'Orbigny). (Pi. LI. figs. 36-39.) 

 Rosalina glohularis d'Orbigny, 1826, TMC. p. 271, pi. xiii. figs. 1-1, Modele no. 69. 

 Discorhina glohularis Parlcer, Jones, & Brady, 1859, etc., NF. 1865, p. 30, pi. ii. fig. 69. 



„ „ Mobius, 1880, FM. p. 96, pi. ix. fig. 18. 



„ „ Erady, 1884, FC. p. 643, pi. Ixxxvi. figs. 8, 13. 



» „ Egger, 1893, FG-. pl.xv. figs. 7-9 ; {Rosalina) p. 365, pi. xiii. figs. 65-68. 



Millett, 1898, etc., FM. 1903, p. 698. 



Sidebottom, 1904, etc., EFD. 1908, p. 11, pi. iii. figs. 3-8; pi. iv. 

 figs. 1, 2. 



Chapman, 1900, FLF. p. 190. 



3 Stations. 



Occurs in greater or less abundance at every Stn., sometimes very common. The 

 species presents an extraordinary range of variation, primarily in the degree of 

 inflation of the chambers and consequent height of the spire, and secondarily in the 

 degree of limbation of the sutures. Some of the specimens, notably at Stns. 1 and IX, 

 are of an extremely thin and scale-like form suggesting a passage into D. cora. At 

 Stns. 1, 2, 6, 10, 11, a variety occurs characterized by a coarsely perforate superior 

 face and an extremely thick but hyaline base without visible perforations, but in 

 which each chamber is furnished at its umbilical edge with a single stout blunted tooth 

 projecting into the umbilical cavity ; from three to six teeth are visible in different 

 specimens giving a very striking appearance to the under side of the shell. At 

 Stns. 1 and 6 a depressed variety with extremely limbate sutures raised above the 

 flat surface of the chambers was found. At Stn. ■? B a single specimen M'hich had 

 apparently been in association with another individual, the whole of the base and the 

 internal septa being absorbed. 



352. Discorbina Mnkhorsti (Eeuss). 



Rosalina Unkhorsti Eeuss, 1861, FKM. p. 317, pi. ii. fig. 3. 



Discorbina binkhursti Jones & Parker, 1872, FFR. p. 114. 



(See Brady, 1884, FC. p. 644, sub D. valvulala.) 

 1 Station. 



A few specimens at Stn. 6 showing the typical depressed shell Avith strongly limbate 

 sutures on the superior face. 



