FOB A MINIFEE A FROM THE NORTH ATLANTIC AND ARCTIC OCEANS. 421 
PLATE XIX. (MISCELLANEOUS FORAMINIFERA.) 
[Figures 2 & 3 are magnified 15 diameters; figs. 1, 4-13, 25 diameters (excepting 
fig. 5 c, 25 diameters.)]. 
Fig. 1. Planorbulina Culter, Parker and Jones. Very rare. Tropical Atlantic (1080 
fathoms). A neat, discoidal, biconvex, trochiform Planorbulina, showing on 
its upper face about twenty-five (often more) neatly set chambers in a compact 
spire, bordered with a thin keel, as wide as a whorl of the chambers. It is an 
extreme varietal condition of the subsymmetrical form, imitating Pulvinulina, 
and ought to have been noticed at page 379, as a starved PL TJngeriana. 
Fig. 2. Planorbulina retinaculata, Parker and Jones. Parasitic on Shells, East and 
West Indies. See page 380. 
Fig. 3, a, b. Planorbulina larvata, Parker and Jones. Indian Sea. See page 380. 
Fig. 4, a, b. Pullenia obliquiloculata, Parker and Jones. Abrohlos Bank (260 fathoms), 
Tropical Atlantic (1080 fathoms), Indian Ocean (2200 fathoms). See page 368. 
Fig. 5, a, b, c. Sphseroidina dehiscens, Parker and Jones. Fig. 5 c, fragment of shell- 
wall more highly magnified. Tropical Atlantic (1080 fathoms) and Indian 
Ocean (2200 fathoms). See page 369. 
Fig. 6, a, b, c. Discorbina rimosa, Parker and Jones. Recent : India (on Clam-shell). 
Fossil: Tertiary, at Grignon, Hautville, Freville, La-Fosse-de-Launy, &c. (Sir 
C. Lyell’s Collection). This is smaller than 1). vesicularis, and close to it and 
D. elegans in alliance ; somewhat oval in shape ; shell-substance thick, pores 
large ; septal plane notched for aperture ; chambers very much larger in the 
newer than in the older part of the shell, and discrete ; and on the upper side 
several of the newer chambers are separated by chinks. On the under side 
there are secondary chambers over the umbilicus, perfect, large, and astral, 
with chinks at their periphery. See page 385. 
Fig. 7, a, b, c. Discorbina globigerinoides, Parker and Jones. Common in the Calcaire 
grossier of Grignon. This Discorbina equals in size fine Tropical Globigerince, 
and reminds one of their form. It is also isomorphous with Cyrnbalopora 
bulloides, D’Orb., sp. In appearance it is the very opposite of its real ally 
D. Parisiensis ; but it has much the same kind of septal face, the inner two- 
thirds of which are thickly covered with sinuous wrinkles and granules of 
exogenous shell-matter, having large pores opening out of them, and thus 
presenting a rudiment of the canal-system. A similar thickened surface, but 
formed of radiating granules, on the under side of the shell, is seen in D. ob- 
tusa, D’Orb., and D. Parisiensis , D’Orb. L The astral processes in D. globigeri- 
noides are abortive. See page 385. 
Fig. 8, a, b, c. Discorbina polystomelloides, Parker and Jones. From the Australian 
Coral-reefs (Jukes’s dredgings). This may be said to be a granulose form of 
mdccclxv. 3 l 
