268 MESSES. E. HERON-ALLEN AND A. EAELAND ON THE 



Orbulina, d'Orbigny. 



25S. Orbulina universa, d'Orbigny. 



Orbulina universa, d'Orbigny, 1839, FC. p. 3, pi. i. fig. 1. 



Brady, 1881, PC. p. 608, pi. lxxviii., pi. lxxxi. figs. 8-26, et scq. 



2 Stations. 



Two specimens only, one at each Sta., small and thick-shelled. The rarity of this 

 species in the gathering is remarkable considering its abundance in the Atlantic Ocean 

 to the immediate westward. 



Sph^eroidina, d'Orbigny. 



259. ? Sphaeroidina sp. (Plate 42. figs. 1U, 20.) 



1 Station. 



We figure a single specimen from Stn. 14 of an organism which from the character 

 of its aperture seems to present some affinity to Sphceroidina. 



It consists of two chambers only, opposed to each other, in the manner of Biloculina 

 bulloides, with a little arched aperture on either face at the line of junction. The shell 

 in the neighbourhood of the two apertures is smooth and hyaline, but the rest of the 

 shell, which forms a slightly compressed sphere, is coarsely aculeate. It may be an 

 abnormal individual of S. bulloides, in which the early chambers have been absorbed 

 and the outer surface is decorated with blunt spines. 



We record and figure this single specimen for purposes of future reference, without 

 naming it. 



Family ROTALIID.E. 



Subfamily Spihillininje. 

 Spirillina, Ehrenberg. 



260. Spirillina vivipara, Ehrenberg. (Plate 42. figs. 21-25.) 



Spirillina vivipara, Ehrenberg, 1811, SNA. p. 442, pi. iii. fig. 41. 

 „ „ Brady, 1884, FC. p. 630, pi. lxxxv. figs. 1-5. 



13 Stations. 



Widely distributed and extremely variable. Attached specimens occur at Stns. 15, 

 19, and 20. At Stn. 3 the tests were all of a peculiar sub-chitinous character, very thin, 

 and brownish in colour, and many had evidently been attached, being irregular in form. 

 At this Stn. and in this condition associated pairs were found. Specimens exhibiting a 

 Iransition-form between S. vivipara and S. margaritifera, which we figure, occur at 

 several Stns. They agree with the Type S. vivipara in the section of the tube and 

 general aspect of the shell ; but the underside of the shell is distinctive, the shell-substance 

 being deposited in thick layers on the outer edges of the convolution and coming down 



