Manchester Memoirs, Vol. liv, (1910), No. 10. 25 



Discorbina, Parker and Jones. 



Discorbina globularis, d'Orbigny, sp. and varieties. 



The type is evidently rather rare, but the variations 

 frequent. Forms Hke those figured in my Delos paper 

 (1908) occur, viz., pi. 3, figs. 3, 5, and pi. 4, figs, i, 2. 



Discorbina rosacea, d'Orbigny, sp. 



Large examples like the Delos specimens, pi. 4, figs. 

 3, 4, also fig. 5, which are rare, and one good test almost 

 identical with the Challenger figure, pi. Zj, fig. i. 



Discorbina orbicularis, Terquem, sp. 



Discorbina araticana, d'Orbigny, sp. 



Discorbina vilardeboana, d'Orbigny, sp. 



Discorbina tabernacnlaris, Brady. (PI. 3, fig. 12.J 



I am much puzzled with these ; they appear to be 

 nearest to Brady's Challenger figure, pi. 89, fig. 7, but 

 they show no limbation, and the sutures are slightly sunk. 

 Some of the tests are tall, others much flattened, and 

 with three exceptions they are all in the state known as 

 plastogamy, that is joined together at their bases, and 

 there are in some instances as many as four pairs clustered 

 together. There are also cases of a tall cone-shaped test 

 joined to a flattened one, as in the illustration, Fig. 12, 

 PI. 3. The strise show on the inferior surface. 



Discorbina tuberciilata, Balkwill and Wright. 

 Very frequent. 



Discorbina parisiensis, d'Orbigny, sp. 



In the Palermo examples the final convolution never 

 entirely covers the central portion of the test on the 

 superior side. There is a set present which has much 



