Botany and Zoology. 163 



11. A new species of Ihihnaniafrom Port Jervis, Xetr York.— 

 J)i. s. T. Hairett, of Port Jer\ is, lias recently described a new 

 "^jn cies of Dalmania from the Lower Helderberg of that \icinity, 

 uiid named it D. dtntata. A description l)j "him, accompanied 

 Mith a plate, v\ill appear in the next number of this Jouinal. 



III. Botany and Zoolcxjv. 



1. Xaudin on the Xafmr of JTereil}t>i and Van,dnht 

 Plants.— Why is it the nature and essence of species to 1 leul 

 and why do specie^ sometime'^ \ai>? In other A\onK, a\] 

 off'sptini^ like pari'nt, and when unlike^ in certain particulars. ^ 



properly enouoli take these t\\o associated vet ojtpooed Iml 

 tirst principles": lUit it is equally proper and" leiritimate to en< 

 after the cause of them. 



jM. Xaudin, a oood manv yoais ago, took up the p 

 phmts, andfoUowul up. ia ' 

 hfe oi certait. self-fertile 



the chaiacters ot two closely related c- 

 7num and JJ. Tatida, w ere mixed, an. 

 the two began to separate in the elos 

 generation, ending in a complete di\ isic 

 into those of the two constituent speci 

 yqjtes Pendus of Sept. 27th 



abstract of f 



paper 



of which the text wa^ simiri-t.-l b\ a 

 liybrM between the wild LaHnra rh-o.,, and a ^.u^^\^ -.f A. 



its seed^ were fully fertile; a great n,imi)ii <.t \(.imu |m u i^ v, . re 

 raised irom them, Jfwdiichtwn.tywerL puM.Ccd to. luh -.(vd- 

 opment and studv. Like other lubrids tin nri-p, il ^'nu.d no 

 character which w^a^ not evi<lentl> deriyd tiuni llu' ^^^'' i-.m-its; 



f'Pecl, although 'tin \ varied (\ceidinnl\ iwnuu tl.nnM 1-^ < - in the 



