F0KAJI1^'1FKKA— HERON-ALLEN AND EARLAND. 221 



from Polystomella verriculata by the character of their markings, and when the 

 costae become intricate or labyrinthic, as they sometimes do, the only distinction 

 observable is the apertural edge and the nature of the orifice. South of Station 6 

 the species dies out, becoming less abundant and characteristic. At its final 

 Station, 11, it has lost all regularity of costation, and the few weak individuals 

 are covered with a reticulate mesh. Many natural glauconitic casts at Station 6. 

 These reveal the presence of an intricate secondary canal-system. 



Sub-Family TINOPORINAE. 



GYPSINA, Carter. 



605. Gypsina inhaerens (Schultze). 



AcervuUna inhaerens, Schultze, 18.54, OP. p. 68, pi. vi, fig. 12. 



Gypsina inhaerens, Heron-Allen .and Earland, 1914, etc., FKA. 191.5, p. 724. 



Stations 1-3, 6, 10. 



Confined to the N.Z. area. Abundant and extremely variable, both in size of 

 specimens and of the constituent chambers. The best series covering all possible 

 variations, both free and sessile at Station 6. Almost equally good at Stations 1 

 and 2. The species incrusts stones and organisms of every description. 



[Ai-enaceous isomorph, Trochammina ^iviformis, Grzyb., and allied forms.] 



606. Gypsina vesicularis (Parker and Jones). 



OrbitoUna vesicularis, Parker and Jones, 1859, etc., NP. 1860, p. .31, no. 5. 

 Gypsina „ Heron-Allen and Earland, 1914, etc., FKA. 1915, p. 726. 



Stations 1-3, 5, 6. 



Much more abundant than G. globulus, and often very nearly passing into that 

 form. The best at Stations 1 and 5, attached specimens at Station 2. 



607. Gypsina globulus (Reuss). 



Ceriopora (jlohidus, Reuss, 1847, Haidinger's Naturw. Abli., vol. ii. ]>. 33. ]>]. v, fig. 7. 

 Gypsina „ Heron-Allen and Earland, 1914, etc., FKA. 1915, p. 727. 



Stations 1, 5, 6. 



Rare, but good. One very large specimen at Station 6. 



POLYTREMA, Risso. 



608. Polytrema miniaceum (Pallas). PI. YIII, figs. 1-31. 



MiUepora miniacea, Pallas. ElencluLs Zoophytoruni. (Hague, 1700). p. 251. 

 Linne, 1788, SN. p. 3,784, no. 6. 

 „ „ Defrance, 1824, Diet. Sci. Nat., vol. xxxi, p. 82. 



Blainville, 1834, Manuel d'Actinologie, p. 410. 

 Polytrema „ Carpenter, Parker and Jones, 1862, ISF. pp. 228, 235, pi. xiii, figs. 18-20. 



7mniaceum, Carter, 1870, HR. pp. 389-392 ; 1876, P. p. 185, pi. xiii, figs. 1-6 ; 

 1879, NF. p. 411. 



