770 T. R. JONES ON FORAMINIFERA AND OSTRACODA 
6. CRISTELLARIA CREPIDULA (Fichtel & Moll.) (Pl. XXXIV. 
fig. 8.) 
A small elongate Cristellarian form, with smooth surface, not 
limbate. Certainly as old as the Lias, frequent in the Oolites, and 
living now. 
7. CRISTELLARIA ROTULATA (Lamarck). See above, p. 765. 
Several specimens. 1. One smooth, fiush-surfaced, thin-edged. 
2. Some, both small and largish, of ordinary character ; occasionally 
limbate. 3. One small, flush, subtranslucent. 
8. CRISTELLARIA cuLTRATA (Montfort). See above, p. 765. 
Several ; largish and small; one with a jagged keel. (?=C. cal- 
car, or broken.) 
9. SPIRILLINA HELVETICA, Kubler & Zwinegli, ‘ Mikrosk. Bild. Urw. 
Schweiz.’ 1867, p. 12, pl. 2. fig. 8. (Pl. XXXIV. fig. 12.) 
One specimen: small, translucent, with nine whorls, increasing 
very slowly in size. We need not separate our specimen from those 
of the Swiss Jura. Sp. Helvetica, from the Opalinus-clay, was 
again described and figured by Zwingli and Kubler in 1870 (Foram. 
Schweiz. Jura), but as a Cornuspira (p. 18, pl. 2, 1. fig. 3), together 
with C. echbergensis from the Parkinsoni-clay, p. 17, pl. 2, iv. 
fig. 2; but they seem to belong to the same species; and both are 
“colourless and glass-clear” (one is “translucent”), so they 
cannot be Cornuspire. 
10. Sprririva crassa (Zwingli & Kiibler), ‘Foram. Schw. Jura,’ 
1870,°p. 19, pl.2,iw.GerZs (Bl XO hig. MiS:) 
This specimen has about four whorls; the last is by far the 
widest. Subtranslucent, rather convex. The Swiss form (from the 
Callovian beds), which seems to be equivalent, was described as a 
Cornuspira, but it is “colourless and glass-clear.” The specific 
name is not quite appropriate, unless the breadth of the whorl is 
taken as thickness; but we need not add to the catalogue of names. 
11 & 12. Puanorsuirna Harpinerrr (D’Orb.), and varieties (PI. 
XXXIV. figs. 14, 15); and Pranorsurina Farcra (F. & M.), 
var. (Pl. XXXIV. fig. 16). 
These small Planorbuline are present as seven or more specimens, 
varying much in size and aspect; some are broken or otherwise 
obscure. Two of the most definite are figured here (figs. 14, 15) 
as belonging to the Pl. Haidingeri type; and one (fig. 16) as being 
nearer to Pl. (Truncatulina) lobatula, W. & Jacob. Analogous 
representatives of the Planorbuline group have been described and 
figured by Zwingli and Kubler from the Jurassic strata of Swit- 
zerland (Foram. Schw. Jura, 1870) under various names—as Wonio- 
nina badensis (p. 37) from the Corallian, Nonionina birmentorfensis 
(p. 29) and Rotalina badensis (p. 35) from the Oxfordian, and Vonio- 
noma oblonga (p. 21) from the Callovian beds. 
