Geological Society. 235 



Description of the Tailed Bat commonly found in Calcutta. 

 By Maj.-Gen. Hardwicke. 



Description of Furcrcea agavephylla, the Agave Cubensis of 

 Linnaeus and Jacquin, and the A. Mexicana of Lamarck. 

 By M. Felix de Avellar Brotero, Prof. Bot. Coimbr. Foreign 

 Member of the Linn. Soc. 



Gen. Char. " Corolla hexapetala supera. Sta7nina ad 

 medium crassiora, glandulae tritbratae nectariferae germen 

 obtegenti inserta, corolla dimidio breviora. Capsula trilocu- 

 laris, trivalvis, polysperma." 



Spec. Char. " F. agavephylla, foliis caudicis crassis, 

 lineari-lanceolatis ; externis dentato-spinosis, dentibus sursum 

 uncinatis ; internis subintegerrimis ; omnibus spina longa ter- 

 minatis, scapo squamigero ad medium pyramidate paniculate, 

 floribus sffipe binis ad bracteas axillaribus pendulis abortivis 

 caducis, bractearum axillis deinde bulbiferis." 



In Maranham, Pernambuco, and other parts of the Brazils : 

 plants were brought to Portugal 30 years ago, and cultivated 

 in the Royal Botanic Garden near Lisbon, where they flowered 

 in November and December 181.4. It grows luxuriantly in 

 Portugal in the open border. 



On the Generic and Specific Characters of the Chysan- 

 themum Indicum of Linnaeus, and of the Plants called Chinese 

 Chrysanthemums. By Joseph Sabine, F.R.S. F.L.S. &c. 



In Vol. XIII. of the Society's Transactions Mr. Sabine 

 pointed out that the plants called Chinese Chrysanthemums 

 had been improperly referred to the Ch. Indicum of Linn. — 

 Mr. Sabine now proposes to separate these plants as distinct 

 species; and all the varieties cultivated in the gardens of the 

 common Chinese Chrysanthemum he proposes to unite un- 

 der the name of Chiysanthemum Sinense : with the following 

 specific character : " C. foliis coriaceis petiolatis sinuato- 

 pinnatifidis dentatis glaucescentibus, radio longissimo caule 

 fruticoso." 



The separation seems to be well founded, upon the thinner 

 texture of the leaves of the Ck. Indicum, those near the top of 

 the stem being entire, whereas those of the proposed new 

 species are deeply cut ; and the ray-florets in the former are 

 but little longer than the calyx, while those of the latter are 

 twice or thrice the length of the calyx and sometimes more. 



GEOLOGICAL SOCIETY. 



Feb. 21. Two Letters were read, communicated by the Pre- 

 sident, addressed by Joseph Byerley, Esq. to B. Fayle, Esq. 

 containing some Notices on the Geology of Sierra Leone. At 



G g 2 Sierra 



