OLIVER ON THE ATLANTIS HYPOTHESIS. 1G7 



from Heer's figures it differs from Pittosjiorum in the absence of the 

 persistent base of the style, and perhaps also, of the lines of septa on 

 the dehisced valves. 



8. LeguminoscB. — Many of the genera must be received with 

 much caution. I am not prepared to make any definite observation 

 upon them just now. 



9. ^^<</e«^■«.— Excepting fig. 17, Tab. cviii. (a fragment) Prof 

 Heer's figures are unlike the genus, in the absence of a more decided 

 and continuous intramarginal vein. The two species described are 

 Unger's. 



10. Melastomites. — Surely not Melastomaceous, failing the pro- 

 minent lateral nerves which almost always reach nearly to the apex 

 or rejoin the midrib. 



11. Terminalia and Comhretum. — Both of these seem to me ex- 

 tremely dubious. C. europcBum is Weber's ; O. 'purpurewn of Vahl 

 {Poivrea coccinea) with which lie compares his plant, differs both in 

 form of leaf and venation. Often the base is not at all narrowed, 

 indeed almost subcordate, and the apex acute or subapiculate. In 

 the absence of the easily preserved winged fruits of many of the 

 Order, Combretaceae must be accepted with doubt. 



12. Weinmminia. — One species resting on leaflets only and a 

 5-partite flower (?) must remain dubious. 



13. Ceanothus. — A determination of "Weber's. Prof. Heer re- 

 gards it as doubtfid. I have compared liis figure of a leaf-fragment 

 Avith C. azureus, and I agree that it is very doubtful indeed. 



14. Bumelia. — I have examined the species of the Hookerian 

 Herbarium, and doubt if the fossil plant have anything to do with 

 the genus. 



15. Macreightia. — Thwaites finds an Ebenacea in Ceylon, with a 

 3-partite calyx, which he provisionally refers to Macreightia. M. 

 ohovata figured in Martins (Fl. brasil. Ebeu. Tab. ii.) has a calyx 

 totally different from Heer's plant, the lobes shorter or scarcely 

 equalling the tube. In other South American species which I have 

 seen, the calyx is distinctly gamosepalous ; least so iu a species in 

 which the calyx is very much smaller than that figured by Prof 

 Heer, whose plant seems indeed as likely to be a Maha as a 

 Macreightia. 



16. Styrax. One species.— I have not seen >S'. Bensoin (with 

 which Prof Heer compares a leaf which he refers to the same species 

 as that affording his fruit) in fruit, but certainly the leaves of 

 Malacca specimens differ considerably from Heer's fig. 11 c. Tab. 

 ciii. in that they are not narrowed to the base, but are generally more 

 or less ovate or ovate-lanceolate. The transverse veins connecting 

 the secondary ones are remarkable in 8. Benzoin ; these are not re- 

 presented in the fossil leaf The fruit almost as nearly resembles 

 that of some species of Tilia as of Sty rax. 



17. Clethra. — Foiuided, -udth doubt, on a portion of a leaf I 

 see nothing in C. alnifolia corresponding to the markiugs figured on 



