THE INEEEIOE OOLITE OE DOESET. 



607 



Termination from the inner whorl nearly straight, then a rather 

 fine horn, then a curve back, and produced on the ventral area. 



Oppelia sttbcostata (J. Buckman). 



1881. Ammonites subcostatus. J. Buckman, Quart. Journ. Geol. 

 Soc. vol. xxxvii. p. 63, no. 8. 



1845. A. subradiatus, d'Orbignv (non Sowerby), Terr. Juras. 

 pi. 118. figs. 1, 2. 



This species was figured by d'Orbignv as the large form of Ojppelia 

 subradiata (Sow.); but I am convinced that it is distinct. It has a 

 far larger umbilicus, coarser ribs, hardly a distinct keel, and is far 

 thicker. 



Localities. Zone of Stephan. Humphriesianum at Oborne &c. ; 

 rather scarce. 



Haploceeas oolithicioi (d'Orb.). 



1845. Ammonites oolithicus, d'Orb. Terr. Jurass. tab. 126. 

 figs. 1-4. 



1854. A. oolithicus (d'Orb.), Morris, Catalogue, p. 294. 



1856. A. oolithicus (d'Orb.), Oppel, Juraformation, p. 573, no. 32. 



Localities. It occurs in the Humphriesianum zone at Oborne and 

 Milborne Wick. Our specimens have a slightly smaller umbilicus 

 than those figured by d'Orbignv, but are exactly similar in all other 

 respects. 



Atvimo^ites cadomensis, Defrance ? 



1845. Ammonites cadomensis (Defrance), d'Orb. Terr. Jurass. 

 pi. 129. figs. 9-11. 



I am not certain to what genus to attribute this species. 



Localities. This species occurs in the zone of Stephan. Humphrie- 

 sianum at Oborne. It is rare. A few specimens possess the peculiar 

 termination. I have one specimen with it from Wyke Quarry, and 

 others from Oborne. 



It may be also interesting to add that we have found the following 

 species of Ancyloceras &c. in the Inferior Oolite : — 



Ancyloceras anmdatum, d'Orb. Terr. Jurass. pi. 225. figs. 1-7. 

 Humphriesianum zone at Oborne. 



Anc. subannulatum, d'Orb. Terr. Jurass. pi. 225. figs. 12-15. 

 Humphriesianum zone at Oborne. 



Anc. bifurcatum, Quenstedt : syn. Hamites bifurcatus, Quenstedt. 

 Ceph. tab. 11. fig. 15. 



Humphriesianum zone at Oborne. 



Anc. bispinatum, d'Orb.? Terr. Jurass. pi. 228. figs. 6-9. 

 It much resembles this species, but is from the top of the Hum- 

 phriesianum zone near Halfway House, and may be new. 



