56 Dr. R. Haeusler on the Trochamminz 
which may be considered passage forms from T. ¢ncerta to 
the typical 7. gordialis *. 
Analogous specimens to those figured by Brady{ are 
occasionally met with. 
Similar specimens to Trochammina proteus (fig. 8){, with a 
regularly divided tube, which, according to Jones, Parker, and 
Kirkby §, are varieties of 7’. gordialis, occur also in the 
lower beds A of the Aargau. 
Distribution. Almost everywhere with T. incerta, but 
chiefly in the beds A and B of Biren, Ménthal, Bézen (where, 
in the lowest banks cut by the road to the station, they are 
more common than anywhere else), and Hottwyl; also in the 
limestones of the Upper Argovian of the Kammerfels (Geiss- 
berg) and Remigen, and of the Sequanian I. of Lanffohr and 
Auenstein. Several specimens I obtained also from the same 
zones of the neighbourhood of Olten and Solothurn, &e. 
Trochammina charoides, J. & P. (PIL IV. fig. 21.) 
The few microscopic shells belonging to this species agree 
fully with the descriptions given by Parker and Jones||, 
Kirkby, Carpenter, Brady, Karrer, &e.{], although typi- 
cal specimens are very rare. They are, as a rule, very 
small, never exceeding 0°3 millim., composed of a simple tube 
of invariable diameter coiled up in a conical spiral. Test 
finely arenaceous, resembling 7. incerta irreg. and T. 
gordialis, from which they differ but very little. 
Distribution. In the lowest beds A of Biiren ; very rare. 
Trochammina pusilla, Gein.** (Pl. IV. figs. 27-30.) 
In the beds A of the Frickthal I found several Trocham- 
mine which show, perhaps, the greatest resemblance to 7. 
usilla. 
Shell free, irregularly convoluted, formed of a non-septate 
* Jones on Swiss Jurassic Foraminifera, Geol. Mag. vol. x. no. 5, 
saiule 
: + Brady, J. c. p. 77, pl. iu. figs. 1-3, - 
¢ Karrer, Z. c. p. 494, pl. i. fig. 8. 
§ “Nomenclature of Foraminifera,” Ann. & Mag. Nat. Hist. ser. 4, 
vol. iv. p. 388. 
|| Jones & Parker, Quart. Journ. Geol. Soc. vol. xvi. p. 304, 
q Carpenter, Introd, Foram. p. 141, pl. xi. fig. 3; Karrer, Sitzungs- 
ber. Akad. Wiss. Wien, vol. lii. p. 494, pl.i. fig. 4; Parker, Jones, & 
Brady, Monogr. Foram. Crag, p. 26; Jones, Parker, & Kirkby, Ann. & 
Mag. Nat. Hist. ser. 4, vol. iv. p. 390; Brady, Monog. Carb. Perm. 
Foram. p. 77. 
** Geinitz, Verst. deutsch. Zechstein, p. 6, pl. iil. figs. 3-6; Dyas, p. 39, 
pl. x. figs. 15-21, m 
