of Edinburgh, Session 1881 - 82 . 
717 
sharp, and the peripheral ends of the chambers are only slightly 
convex instead of standing out prominently as in P. canciriensis. 
Notwithstanding its small minute dimensions, it generally 
attracts attention by its glistening white appearance. Longer 
diameter, inch or 0*25 mm. 
With one or two exceptions all these species, though some have 
been undescribed hitherto, occur in the material obtained on the 
“ Challenger” and “ Porcupine” expeditions, so that figures, as well as 
further details respecting their history and distribution, may be left 
until the publication of the “ Challenger” report on Foraminifera. 
It may just be mentioned that the empty silicious tests of one of 
the Phceodaria (the form with Mr Murray’s manuscript name 
Chcdlengeria naresi) were found in the material from D and E. 
Surface Forms. — There has not been time for the complete 
investigation of the gatherings made by the tow-net, and the fol- 
lowing notes on the surface fauna are based upon the examination 
of about thirty mountings made by Mr Murray. As these are from 
material taken on nine different days, between July 27 and August 
12, at various depths, from the actual surface down to 35 fathoms, 
and vary but little in the Foraminifera they contain, they are 
probably sufficiently representative. 
The Globigerinai are all referable to Gl. bidloides , Gl. inflata , and 
Gl. ( Orbulina ) universa ; the specimens are small and thin- shelled, 
and those of Globigerina (proper) are non-spinous. The Orbulince, 
on the other hand, are sometimes armed with very short delicate 
spines. No specimens of Globigerina borealis occur in any of the 
surface mountings, and no Pidvinulmce. The absence of the latter 
is in no way remarkable, for none of the species known to be 
pelagic are present in any considerable number in the dredged 
material ; but that the small northern variety of Globigerina, which 
is tolerably abundant as a bottom species in three out of the five 
localities, should not be an equally prominent constituent of the 
surface fauna is a noteworthy fact. 
