A6 FORAMINIFERA OF THE CRAG. 
part of Z. distoma-polita, P. and J., from Australia; the fourth (Amphorina distorta) 
is unsymmetrical, and altogether analogous to those found in the Crag. 
We choose the term “ gracillima,” as having been applied to the most typical form. 
Seguenza’s Amphorina globosa, Am. tenuicalcar, Am. oliveformis, and Am. elongata (figs. 
31—84), are apiculate individuals standing between Lagena gracillima and L. levis. 
Lagena gracillima (under one modification or another) occurs on the Norwegian coast 
and in the Red Sea, on the beach near Melbourne, at Swan River, and on the Australian 
Coral-reefs. One or two specimens are also reported from the Durham coast. 
In the Crag it has hitherto been found only in the Sutton beds. It is not uncommon 
in the Tertiary marl of Sicily, examined by Prof. Seguenza. 
Genus—Noposarina, Parker and Jones. 
Navtitus, OrrHoceras (parte), OrrHocera, Noposaria, ELirpsorpina (?), GLAN- 
DULINA, Mucronina, LINGULINA, FissuriNa, AMPHIMORPHINA, FRONDICULARIA, 
FLABELLINA, Denrattna, DENTALINOPSIS, VAGINULINA, RimuLiIna, MareI- 
NULINA, PskEcapiuM, Linetiinopsis, HemicristeLLarta, HEMIROBULINA, 
SARACENARIA, CrisTELLARIA, Ropunina, PLanuLartia, &c., Auctorum.' 
General characters—Shell hyaline, tubuliferous, either straight, arcuate, or disco- 
spiral; composed of several segments, arranged in one series. Pseudopodial orifice 
terminal and single, either central or excentric. Surface smooth, or ornamented with 
straight, raised, parallel lines, either continuous or interrupted, sometimes reduced to 
spines or granules, sometimes replaced by one or more keels. 
Nodosarina (Marginulina) raphanus is the central form of a large series of Foramini- 
fera, whose constant variation in respect to degree of curvature, excentricity of aperture, 
with greater or less flatness or compression, has given rise to the most unphilosophical 
splitting up of what is practically a single species into an almost infinite number of 
pseudo-specific forms. The so-called genera and subgenera Glandulina, Nodosaria, 
Lingulina, Frondicularia, Flabellina, Rimulina, Dentalina, Vaginulina, Marginulina, 
Planularia, Cristellaria, &c., have in this way all been constituted on characters of scarcely 
varietal significance. With some exceptions, however, they have a certain value of con- 
venience, which induces us, as in other cases, to admit them as representing divisions 
or groups in an otherwise unwieldy genus, which have certain peculiarities in common, 
though it would not be difficult to find a series of specimens which should exhibit every 
variation, from the straightest and most elongated odosaria to the most lenticular and 
carinate Cristellaria. We shall speak of these groups as subgenera, for want of a better title. 
' Ehrenberg applied the term “ Nodosarina’’ (Berlin Acad. Transact. for 1838) to a corresponding 
group of Moraminifera, as a Family of the Polythalamian Order of his ‘* Bryozoa.” 
