REPORT ON THE EORAMINIFERA. 
693 
Pulvinulina canariensis inhabits a somewhat larger area than the typical Pulvinulina 
menardii, its northern and southern limits being lat. 60° 32' N., and lat. 46° 40' S. 
respectively. It is less common than the type in the tropics, and more generally diffused 
in the north and south temperate zones ; hence in the “ Porcupine ” dredgings Pulvinulina 
canariensis is abundant, whilst well-characterised examples of Pulvinulina menardii are 
extremely rare. 
Surface-specimens were obtained by the Challenger naturalists at three points in the 
North Atlantic, at ten in the South Pacific, and at one in the North Pacific. It has been 
observed in bottom-dredgings from fifty to sixty Challenger and “ Porcupine ” Stations, 
distributed over the North and South Atlantic, the Southern Ocean, and the South Pacific. 
It is much less common in the North Pacific and the Indian Ocean. 
Mr. Robertson has specimens of Pulvinulina canariensis from the Post-tertiary beds 
of Garvel Park, Greenock ; but with this exception the species has not been identified in 
the fossil condition. 
Pulvinulina patagonica, d’Orbigny, sp. (PI. CIII. fig. 7, a.b.c.). 
Rotalina patagonica, d’Orbigny; 1839, Foram. Amer. Merid.; p. 36, pi, ii. figs. 6-8. 
Pulvinulina scitula, Brady, 1882, Proc. Roy. Soc. Edin., vol. xi. p. 716. 
“ A variety of Pulvinulina canariensis, differing from the typical form in its 
relatively small size and compact habit of growth. The margin is rounded instead of 
sharp, and the peripheral ends of the chambers are only slightly convex instead of 
standing out prominently as in Pulvinulina canariensis. Notwithstanding its minute 
dimensions, it generally attracts attention by its glistening white appearance. Longer 
diameter, j-^yth inch (0'25 mm.),” or more. 
This variety was noticed in the foregoing terms under the name Pulvinulina scitula, 
in the “Knight Errant” Report ( loc . cit.) When that Report was written, I had 
overlooked or only partially considered d’Orbigny ’s previous description and figures of 
Rotalina patagonica, which, notwithstanding some discrepancies, I am now convinced 
are intended for the same form. The diameter of the test, according to d’Orbigny, is one- 
sixth of a millimetre (nhyth inch) ; his specimens, however, were from comparatively shallow 
water ; those from the Faroe Channel were somewhat larger, about i nc k ’■> but, on 
deep bottoms in the South Pacific and elsewhere, the test frequently measures ^th inch 
in its longer diameter. 
A few rather doubtful surface-specimens of Pulvimdina patagonica have been 
observed in one tow-net gathering in the South Atlantic, and in one from the west coast 
of Patagonia. It is, however, so common a constituent of bottom-dredgings and so 
widely diffused, that more evidence is required before it can be classed amongst normally 
pelagic organisms. The following is the record of its geographical distribution : — twenty- 
one Stations in the North Atlantic, depths from 90 to 2435 fathoms ; eight in the South 
(ZOOL. CHALL. EXP. — PART XXIX. 1881.) ^ ^8 
