582 MESSES. E. HEEON-ALLEN AND A. EAELAND ON THE 



8 Stations. 



General!;/ distributed, but never abundant, althougli at some of the Stns. the 

 specimens are exceptionally large and finely developed, notably at Stns. 1, 6, and 9. 

 The individuals are of the arenaceous type, no porcellanous specimens being observed 

 excepting at Stn. 4, where immature tests with a sub-arenaceous investment were 

 found. The aperture when perfect is invariably cribrate. 



Subgenus Massilina Schlumberger *, 



85. Massilina secans (d'Orbigny). (Pi. XLIV. figs. 24-27.) 



QuinquelocuUna secans d'Orbiguy, 1826, TMC. p. 303. no. 43, Modele no. 96. 



„ planciana d'Orbigny, 1839, FC. p. 186, pi. x. figs. 24, 25 ; pi. xi. figs. 4-6. 



Miliolina seminulum, var. disciformis Williamson, 1858, KFGB. p. 86, pi. vii. figs. 188, 189. 

 QuinquelocuUna secans Parker, Jones, & Brady, 1859, etc., NF. 1865, p. 34^ pi. i. fig. 10. 

 Miliolina secans Brady, 1884, FC. p. 167, pi. vi. figs. 1, 2. 



Massilina secans Schlumberger, 1893, MGM. p. 76, woodcuts figs. 31-34, pi. iv. figs. 82, 83, 

 Miliolina secans Goes, 1894, ASF. p. 112, pi. xx. fig. 856. 

 Massilina secans Heron- Allen & Earland, 1908, etc., SB. 1910, pp. 693 et seq. 



6 Stations. 



Sparingly distributed and very rare, most numerous at Stns. 7 and 9. The large 

 compressed form is not represented at all in the dredgings, all the specimens being of 

 the long thick type of QuinquelocuUna 2)eregrina d'Orbigny (d'O. 1846, FFV. p. 292, 

 pi. xix. figs. 1-3). The specimens, although few in number, exhibit considerable 

 diversity in the shell-texture, which varies from polished porcellanous to sclerotic. 

 Many of the specimens, especially at Stns. 1 and 7, have a prominently recurved lip. 

 We figure one of these. 



86. Massilina secans, var. tenuistriata Earland. (Pi. XLIV. figs. 28-31.) 



Massilina secans, var. tenuistriata Earland, 1905, FBS. p. 198, pi. xi. fig. 5. 



„ „ „ Heron-Allen & Earland, 1908, etc., SB. 1909, p. 317, and 



1910, p. 693. 

 „ „ „ Heron-Allen & Earland, 1913, CI. p. 34. 



3 Stations. 



Occurs in some numbers and quite characteristic, the best being at Stn. ?X. 



87. Massilina secans, var. reticulata, nov. (Pi. XLV. figs. 1-4.) 



10 Stations. 



The character of the test and arrangement of the chambers are as in M. secans and 

 equally variable, but the entire surface is covered with a regularly reticulate or engine- 

 turned marking, due to the intersection of two series of radial costae. These 

 reticulations vary very greatly in development from a very feeble to a pronounced 



* The subgenera Massilina and Sigmoilina have been included in the genus Miliolina instead of among 

 the Haueriuinse, their affinities being, in our opinion, near to the typical Miliolids. In the Clare Island 

 report we followed Schlumberger, but we have now reconsidered the matter. 



