BITUBIGERA. 
207 
8. insignis (Xarsson), 1887. 
•Syx. Idmonea insignis, Marsson, 1887. Bry. Biig. : Bal. Abh. vol. iv. p. 29, 
pi. ii. %. 12. 
<^HAR. — Zoariimi of cyliudrical branches with siibalternate rows of five or six 
apertures, one series of which extends to the middle line. Keverse with large 
irregular pores. 
DiSTiiin. — Senonian : Riigen. 
Aff. — Possibly a basal jnirt of R. pseudodisticha (Hag.). 
9. ?sagena (Gabb & Horn), 1860. 
Syn. RHlcuUpora sagena, Gabb &: Horn, 1860. New Cor. N.J. : Proc. Acad. 
Nat. Sci. Phil. 1860, p. 366. 
,, ,, Gabb & Horn, 1860. New Amer. Foss. : Journ. 
ihid. ser. 2, vol. iv. p. 400, pi. Ixix. figs. 30-2. 
,, ,, Gabb & Horn, 1862. Foss. Polyz. N. Amer.: ihid. 
ser. 2, vol. v. p. 173. 
•Chak. — Z oarium lleticrisian in form, but the description and figures of the 
zoo.'cia rather suggest a Eetecavan affinity. 
DisTuin. — Turonian : Timber Creek, New Jersey. 
10. ?subgradata (d’Orbigny), 1850. 
Syn. (Jrisina subgradata, d’Orbigny, I860. Prod. Pal. vol. ii. p. 266. 
,, ,, d’Orbigny, 1851-4. Bry. Cret. p. 914, pi. 612, 
figs'. 6-10. 
,, ,, Pergens, 1890. Eevision, p. 357. 
•<Jhar. — A pertures in triserial rows, which are alternate and widely separated by 
a median groove. Obverse surface rounded. 
Distrir. — S enonian — Maastrichtian : Fecamp. 
Aff. — Pergens remarks that the specimen is unlike the figure. 
H’Orbigny’s description suggests close affinity to R. cretacea 
(Edw.). 
BITUBIGERA, d’Orbigny, 1853. 
Synonyms. 
Bituhigera, d’Orbigny, 1853. 
Idmonea, pars, Philippi, 1844. 
Idmonea, pars, d’Orbigny, 1852. 
Bitubigera, Marsson, 1887. 
Diagnosis. 
In all respects like Crisina, except that the lateral rows of 
apertures are biserial instead of uniserial. 
