50 JOURNAL OF THE [April, 



sum. Nine narrow strongly arched chambers, with low, but well defined 

 septa, which run together in a central, small, low, irregular umbilicate 

 disk. Aperture oval, cut in deeply two-thirds of the way up, through the 

 next to the last whorls, ahnost forked, margined on both sides by a nar- 

 row ridge. Very rare. 

 3. C>. rotnlata, Lam. sp. L. c. 326. Rare. 



c) Robulina, d'Orb. 



K. tnichyomphalay Rss. Haidinger's gesamm. naturwiss. Abhdl. iv. i, 

 34, pi. iii. fig. 12. Rare. More frequent in the mucronate marl of Nag- 

 orzani at Lemberg. Young individuals have only 5-6 chambers, and a 

 very small indistinct umbilicate disk. Some specimens are slightly keeled 

 at the back. 



J. LITUOLIDEA (m.) 

 Haplophragmium, Rss. 



I. H. sp. A nonionian form, with six arched chambers separated by 

 deep sutures. Shell very rough with small, roundish nonionian aperture. 

 Only one specimen. 



4. ROTALIDEA, Schltz. 

 Rotalia, Lam. 



1. R. iiitida, Rss. Sitzungsber. d. k. Akad. d. Wiss. in Wien., 

 xl. 222. Very rare. Elsewhere occurring in the " Mucronaten und 

 Quadraten Schichten," and in the " Planer." 



2. R. Afickeliniana, d'Orh. Mem. de la. Soc. geol de Fr. , iv. i, 31, 

 figs. 1-3. Very rare to the " Planer." Also occurring in the upper Cre- 

 taceous of other countries down. 



3. R. polyraphes, Rss. Haidinger's gesamm. naturwiss. Abhdl., 

 iv. I, 35, pi. iv. fig. r. Very rare. Common in the mucronate and 

 quadrate layers, and in the " Planer " of other countries, rare in the Cre- 

 taceous and in the Gault. Numerous localities are mentioned in the 

 Sitzungsber. d. k. Akad. d. Wiss. in Wien., xi. 77 



4. R. Mortoni, n. sp. PI. viii. fig. i. Common. Similar to R. poly- 

 raphes, Rss., and even more so to R. lenticula, Rss. — Die Kreidever- 

 stein. BShmens, i. 35, pl. xii. fig. 17 — but much larger than the last, 

 more curved on the spiral side, with numerous and more narrow chambers. 

 Diameter reaches 0.77 mm. The shell is depressed, lens-shaped, with an 

 acute margin, both sides somewhat curved, the umbilicate side more 

 strongly. On the spiral side usually 'only the last whorl is separated by a 

 narrow but rather deep suture ; the older two are but seldom distinguish- 

 able externally, and are covered by a calcareous incrustation, which is 

 permeated by porous canals of varied sizes ; nine to ten chambers in the 

 last whorl, of which only the last two or three are separated by distinct 

 sutures. They are only slightly curved. The others are usually indistin- 

 guishable externally. The umbilicate side shows in its centre either a very 



