Vol. 69.] JURASSIC AMMONITES FROM JEBEL ZAGHUAN. 



543 



(2) The Callovian. 



Reinecheia anceps (Rein.) and Lunuloceras lunula (Ziet.) have 

 been recorded from Batna in Algeria; and a specimen of a Reinecheia 

 comparable with the type-form, or, in any case, belonging to the 

 ' substeinmanni' group of Lemoine, 1 from Founi Islamen, Constan- 

 tine, is in the British Museum (Natural History). 2 But it was 

 generally believed that the whole series of beds from the Domerian 

 to the Argovian was absent in Northern Tunisia. 1 have, however, 

 found the two forms mentioned below on the path to the Poste 

 Optique, about half way up, where a branch of it leads into a 

 small pit of red limestone, evidently used for getting material 

 to repair the path. The outcrop is small, much overgrown, and 

 obviously forms quite an isolated patch amid unfossiliferous grey 

 limestone of different age. The matrix (red marble) is the 

 same as that of the specimen from Eoum Islamen, and both 

 my specimens were cut out of the rock-surface. They are 

 Reinecheia aff. hungarica Till and PerispJiinctes cf. bieniaszi 

 Teisseyre. 



Both forms beloug to the zone of Reinecheia anceps, and the 

 world-wide distribution of the genus Reinecheia in deposits of 

 Callovian age has long been proved. 



(3) The Corallian. 



The lower part of the Corallian, as interpreted by Mr. Buckman 3 

 (that is, the corclatus and precordatus zones), as also the upper 

 zones of the Divesian (Oxfordian) seem to be absent ; but the 

 Argovian, or zone of Peltoceras transversarium, is well represented. 

 Pervinquiere quotes only Phylloceras manfredi Opp., Soiverbgceras 

 tortisulcatum (d'Orb.), and Ochetoceras arolicum (Opp.) with un- 

 identified Phyllocerates, PerispJiinctes, and Aspidoceras from a 

 small outcrop of greenish-grey limestone on the Telegraphe. But 

 G. Le Mesle 4 also found (perhaps at the same spot) : — 



Lytoceras liehigi Opp. 

 Taramelliceras [Oppelia] anar (Opp.). 

 Taramelliceras [Oppelia] cf. backi- 

 anum (Opp.). 



Whereas Baltzer records from the south of the mountain, near 

 the ' Gabrielle ' mine : — 



Peltoceras transversarium (Quenst.). 

 Pcrisphinctcs (Biplices) cf. kobclti 

 Neum. 



Taramelliceras \Oppelki\ callicerum 



(Opp.). 

 Taramelliceras [Opjjelia] fiexuosum 



(Miinst.). 

 Aspidoceras cegir (Opp.). 



Peltoceras eugenii (Rasp.). 

 Perisphinctes plicatilis (Sow.). 

 Perisphinctcs martelli (Opp.). 

 Simoceras [Perisphinctes] doublieri 

 (d'Orb.). 



1 P. Lemoine, ' Pal. Madagascar : pfc. 8 — Ammonites Jui'ass. Super. d'Anala- 

 lava ' Ann. Paleont. vol. v (1910) p. 9 [145]. 



2 Specimen No. C 10568. 



3 See G-. W. Lamplugh & F. L. Kitchin, ' On the Mesozoic Rocks in some 

 of the Coal-Explorations in Kent' Mem. Geol. Surv. 1911, p. 132. 



4 ' Sur le Jurassique du Zaghouan' Bull. Soc. Geol. France, ser. 3, vol. xvii 

 (1888) p. 63. 



