Manchester Memoirs, Vol. Hi. (1908), No. IJ5. 15 



Discorbina pileolus, d'Orbigny, sp. 



Vahiilina pileolus, d'Orbigny ('39), p. 47, pi. i, figs. 

 15-17. 



Discorbina pileolus (d'Orb.), Brady ('84), p. 649, pi. 89, 

 figs. 2-4. 



Unfortunately the six tests found are in the condition 

 known as plastogamy, thus forming three pair. I think 

 there can be little doubt that they belong to this 

 species, though not quite typical. In two of them, how- 

 ever, a small portion of the inferior surfaces can be seen 

 (the tests not being of quite the same size), and they 

 appear to bear the characteristic markings. 



*Discorbina tabernacularis, Brady. 



Discorbina tabernacularis, Brady ('84), p. 648, pi. 89, 

 figs. 5-7. 



D. tabernacularis (Brady), Egger ('93), p. 390, pi. 15, 

 figs. 58-60, 79. 



The Delos specimens agree best with the smaller of 

 those figured by Brady in the above reference, viz., fig. 7, 

 with the exception that the delicate striae are absent. 



Mr. Millett (:03) reports it from the Malay Archi- 

 pelago, page 700. Very rare. 



*Discorbina tuberculata, Balkwill and Wright. 



(PI- 5, fig. 5). 



Discorbina tuberculata, Balkwill and Wright ('85), 

 p. 350, pi. 13, figs. 28-30. 



D. tuberculata (B. & W.), Halkyard ('89), p. 70, pi. 2, 

 fig. 10. 



The tubercles are not so large as those on the speci- 

 men figured by Messrs. Balkwill and Wright, otherwise 

 the specimens are typical. Rather rare. 



