FORAMINll<"RllA— HERON-ALLEN AND I'lAKLAND. 133 



19 a shorter, stouter, niegalospheric- type only occurs. At Stations 6, 8 and 9 



botli forms are represented, the niegalospheric being as a rule very scarce. The 



best specimens at Stations 4 and 0. At Stations 27 and 31 a very slender 

 hyaline form only occurs. 



242. Bolivina punctata, var. arenacea nov. PI. IV. figs. 21, 22. 



Stations 27, 29, 41, 44, 45. 50, 52, 53, 55 (+ D.)- 



Between Stations 19 and 27 there are no records of B. punctata. At 

 Station 27 the foi'in recurs both in the type and with an arenaceous isomorph 

 which is found at intervals as far south as Station 55. All the specimens are 

 practically identical, constructed somewhat coarsely of fine sand-grains without 

 much cement, so that the surface is rough. They are rather broad at their 

 maximum width, as if it were a passage-form between B. punctata and B. cUlatata, 

 the aperture is very ol)scure, but in the best specimens is a short- compressed 

 tube (bifarme) at the extremity of the final chamlier. All the specimens appear to 

 be microspheric. 



Size: — Lenoih. -35 mm. ; maximum breadth, •13 mm.; thickness, '08 mm. 



o 



243. Bolivina textikirioides, Reuss. 



Bolivina textilarioides, Reass, 1862, NHG. p. 81, pi. x, fig. 1. 



Brady, 1884, FC. p. 419, pi. lii, iig. 23 (only). 



Stations 9, 27 (-1- R. d. J.). 



A few specimens at Station 9, and one at Station 27, of the smooth type originally 

 figured by Reuss. 



244. Bolivina textilarioides, var. spinescens, Cushman. 



Bolivina textilarioides, Brady. 1884, FC. p. 419, pi. lii, figs. 24. 2.5. 



Brady, Parker aud Joues, 1888, AB. p. 221, pi. xliii, fig. 1. 

 Millett, 1898, etc., FM. 1900, p. 542, pi. iv, fig. 5. 

 Heron-Allen and Earland, 1908, etc., SB. 1911, p. 316, ])1. x, figs. 10-12. 

 Heron-Alleu and Earland, 1916, FWS. p. 238, pi. xli, figs. 10-14. 

 ,, spinescens, Cushman, 1910, etc., FNP. 1911, p. 46, fig. 76. 



Stations 2, 5, 6, 8-11, 55 (4- D.). 



Cushman founds his variety upon two of Brady's figures of B. textilarioides, 

 Rss. The figures differ from the true Reuss type in the roughness of the 

 sutural depressions. There is no doubt that this rough type is much more widely 

 distributed and abundant than the true B. textilarioides, and there would be 

 great difficulty in identifying past records of Reuss's species. But it seems 

 desirable that two forms should be distinguished in future, although we consider 

 them to be very closely allied and not exhibiting greater variation than is 

 recognised in many other species. The N.Z. area furnishes an excellent series 

 of var. sjnnescens, especially at Stations 9, 10, and 11, where the sutural 



