16 ME. FEEDEKICK CHAPMAN ON THE 



so-called Biloculina sphcera of d'Orbigny, although Brady united the two forms 

 in his synonymy of the latter species, which is in reality a Planispirina. 

 Occurrence. — Grice's Creek, frequent ; Altona Bay Coal-Shaft, rare. 



Grenus Spiroloculina, d'OrUgny. 



Spiroloculina acutimargo, Brady. (Plate 1. fig. 19.) 



Spiroloculina acutimargo, Brady, 1884, Rep. Chall. vol. ix. p. 154, pi. 10. figs. 12-15. 



This species is found, in the living condition, from the littoral zone down 

 to moderately deep water areas. It is distinguished from other Spiroloculince 

 of the same compressed type by its sharp peripheral margin. 



Occurrence, — Grrice's Creek, rare ; Kackeraboite Creek, rare. 



Spiroloculina affixa, Terguem. (Plate 1. figs. 23-25.) 



Spiroloctdina affixa, Terquem, 1878, Mem. Soc. Geol. France, ser. III. vol. i. p. 55, pi. 5 (10) 

 figs. 13 a-c. 



Spiroloculina incequilateralis, Schlumberger, 1887, Bull. Soc. Zool. France, vol. xii. p. 202, 

 pi. 4. figs. 84-86, woodcut fig. 3. 



Spiroloculina affixa, Terq., Howchin, 1889, Trans. R. Soc. S. Australia, vol. xii. p. 2. 



This delicate and thin-walled foraminifer has one face almost flat whilst 

 the opposite surface rapidly increases in thickness from the centre to the 

 margin, appearing as if deeply incised by a V-shaped groove along the median 

 line of the shell. S. affixa has been recorded from the Lower Beds of Muddy 

 Creek (Howchin). 



Occurrence. — Grice's Creek, rare. 



Spiroloculina canaliculata, d'Orbigny. (Plate 1. figs. 20, 21.) 



Spiroloculina cajialiculata, d'Orbigny, 1846,Foram. Foss. Vienna, p. 269, pi. 16. figs. 10-12; 

 Jones, 1895, Foram. Crag, pt. ii. p. 108, pi. 3. figs. 39, 40, woodcuts figs. 3 a, 3 6. 



Our specimen figured is small but otherwise quite typical. It is readily 

 distinguished by its grooved margin. 



Occurrence. — Kackeraboite Creek, very rare. 



Spiroloculina asperula, Karrer. (Plate 1. fig. 2'2.) 



Spiroloculina asperula, Karrer, 1868, Sitzungsb. d. K. Ak. Wiss. Wien, vol. Ivii. p. 136, 

 pi. 1. fig. 10; Brady, 1884, Rep. Chall. vol. ix. p. 152, pi. 8. figs. 13, 14; Howcbin, 1889, 

 Trans. R. Soc. S. Australia, vol. xii. p. 3. 



The majority of our specimens have the suture-lines on the face of the test 

 obscured by the arenaceous covering. Howchin notes the same feature in the 

 specimens from Muddy Creek, where he records it from the Lower Beds. 

 Karrer's original figure is that of a more elongate shell, the sutures being 

 very distinct ; the Balcombian specimens more nearly resemble the recent 



