KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 19. N:0 4. 69 



Syu. Bolivina tegulata Rss., 1850, Kreidemei-gel Lembers;; Heid. Nat. Abli. 4. i, p. 45, t. 4, 



fig. 12. 



d) striata: 



Bolivina nobilis IIken., 1875, For. Clav. Szåb. Scb. p. 65, t. 15, tig. 4. 



» semistriata Hken., ibid. p. 65, t. 7, fig. 13. 



Bulimina sqiiainosa var. subsquiimos.a Egger 



Tab. IV, figg-. 109-113. 



This form, which is not to be identified with Virg. subsquamosa Egger without 

 some hesitation, seeins to occupy a position intermediate between d'Orbigny's genus 

 Bulimina and his Virgulina; but it is inore nearly allied to the latter than appears at 

 first sight. 



The generally slender and elongated Virg. squauiosa becomes sometimes short and 

 broad (see fig. 103) and then is hardly distinguishable froin tlie variety in question. 



Its shell-substance like tlie preceding has in transmitted light the same dusky 

 hue, being, as it were, incorporated with fine dust, which almost hides the pores and 

 presents a strong contrast to the clear, transparent shells of most of its nearest con- 

 geners. The pores are more wide apart than in Bul. jnqjoides. 



The tendency of the early chambers to coil up is of no specific importance and 

 is often wanting. Such broad forras resemble somewhat Cassidulina oblonga Rss. Wil- 

 liamson has described a Bul. pupoides var. convoluta, which may possibly belong to 

 this variety (Brit. recent foramf. p. 63, figg. 132 — 133). 



It is always of small size and not uncommon on the chalk-bottom. 



Fig. 109: a. Textulariaformed; b. the same more enlarged. 



Figg. 110 — 113: two somewhat coiled specimens. 



Syn. Virgulina subsquamosa Egger, 1857, Miocän. v. Ortenburg; Leoiili. u. Broun. Jhrb. 1857, p. 295, 



t. 12, figg. 19—21. 

 » tenuis Seg., 1862, Ehizopod. foss. Catania p. 28, t. 2, fig. 2 (Acoad. Gioeuia Atti 



(2) 18). 

 Strophoconus? teretiuscula Egger, 1. cit. p. 292, t. 12, figg. 30 — 32. 



« Hemprichii Ehrenb. (partim) t. 28, figg. 28—30; t. 29, fig. 38; t. 32, figg. 18— 20?. 



Grammostomum Ehrenb., ibid. t. 24, figg. 28 — 23. 



Bulimina (Bolivina) pnnctata dOrb. 



Tab. IV, figg 114—126. 



This is the most Textularialike of the BuliminaB. Its principal difference from 

 Bul. squamosa should consist in the smaller degree of obliquity in its septa; of course 

 a very vague mark of distinction among members of such a class as Rhizopodes. 



Bolivina textidarioides Rss., Bol. elongata Kärr., Bol. antiqua d'Orb., Virgul. Reussii 

 Gein. are all intermediate between Bul. punctata and squamosa. 



