OLIVEB ON THE STEM OF DICOTYLEDOXS. 329 



dotted vessels are arranged in concentric circles, resembling 

 annual zones, but corresponding to different periods of vegetation. 

 — Asarum. Yaupell, C. iiber d. peripherische Wachstbum d. 

 Gefassbiiudel, &c. Leipsic, 1855, 25. — Asij)Jionia. Griffith, Linn. 

 Trans, xix. 334. 

 Nepenthaceae. Kortbals, P. "W. Over bet Geslacbt NepentJies, 

 in Temminck's A'erbandel. 1839-42, witb numerous figs, tabb. 

 XX, xxi. The anatomy of JSf. ampidlaria is minutely described. 

 The adult stem presents a tolerably "wide, parenchymatous pith, 

 traversed vertically by isolated spiral vessels, woody bundles, 

 with primary medullary rays, and a series of inosculating 

 secondary plates, one cell in thickness, forming an irregular net- 

 work between the primary rays. Tlie wood-bundles consist of 

 dotted prosench}Tna with, especially towards the periphery, rather 

 wide, dotted vessels ; towards the pith spiral vessels occur scat- 

 tered through the prosenchyma. Exterior to the cambimn-layer 

 is a rather thick belt of spiral vessels; others are found scattered 

 through the cortical parenchyma. — Treviranus. Ueber einiger 

 Arten anomalischer Holzbildung bei Dicotyledonen. Bot. Zeit. 

 1S17. 400.— Henfrey. On Progress of Physiol. Bot. A. N. H. 2 ser. 

 i. 131. Bark, Avood, liber, and pith are full of spiral-fibrous cells. 

 — Lindley, J. Introd. Botany, i. 211. J^. distillatoria. The 

 pith abounds in spiral vessels ; a dense layer of Ligneous tissue 

 occupies the place of the medullary sheath. There are no me- 

 dullaiy rays, and the wood has no concentric zones. Between 

 the wood and bark is a thicb parenchymatous layer, " in which 

 an immense quantity of very large spiral vessels is found." Veg. 

 Kingd. 287.— Miquel, P. A. W. Joum. Bot. Ned. 1861. p. 278. 



(To be concluded in, our next.) 



XXX. — Eemaeks on the Teanslation of the fiest chaptee 

 OF Aeistotle's Histoey of Animals. By John Scouler, 

 M.D. F.L.S. 



It is to be regretted that we have no English translation of the 

 History of Animals, and that a work which should be studied by 

 every naturalist, is inaccessible to all Avho are not acquainted with 

 the original language.* The French translation of Camus is as good 

 as an excellent scholar could render it who was ignorant of Natural 

 History. The Germans possess not only a translation of the 

 Natural History, but also one of the treatise on comparative 

 Anatomy (De Partibus). The translation of the Natural History is 



* This article was written before the appearance of Sir. Cresswell's Translation, 

 recently published Ijy Mr. Bohn. — (Ed N. H. E.) 



