302 Analysis of Periodical Works on Zoology and Botany. 



first time, by the indefatigable Dr. Wallich, as a native of Upper Nepal. 

 Tulipa suaveolens : the broad-leaved variety. Anagallis latifolia, from Spain. 

 Cynanchum nigrum, Brown Asclep. (Asclepias nigra Linn. \\"i]]d. &c.) The 

 concluding j)late represents a new species of Ci-assu/a by the specific name 

 oi albijlora, recently sent from the Cape. C. foliis carnosis ovatis acuminatis 

 patentibiis cartilagineis. 



PI. 2392. Bromelia sijhestris Wilkl. : represented remarkably well on a 

 double plate, from a plant at the Chelsea Gardens. Opitntia vulgaris, Ha- 

 worth : here called a dwarf variety of the common Cactus Opuntia. We al- 

 most think this may turn out a distinct plant from that now become indige- 

 nous in the south of Europe ; the spines of which are always three in each 

 fasciculus, near an inch long, and more horny than setaceous. The Mediter- 

 ranean plant, moreover, is erect, and not prostrate. Hi/osci/amus niger (var. 

 /3. annua) : we concur with Dr. Sims in thinking this a simple variety. Pe- 

 rilla ocymoides : the figure is particularly well designed; but the want of 

 outline dissections is doubly felt from the minute size of the flowers. Pi.23f;6 

 represents the same species of Berheris as we have before noticed in the 

 Botanical Register; but it is here called B.fasciciilaris. In the adoption of 

 specific names, priority should be an invariable guide, a rule decidedly 

 against the name here followed. The arguments on the instability of Ma- 

 honia as a genus, are the same as those we have before alluded to. Crinum 

 angustum, a lovely plant, beautifully figured. The initials of W. H. lead us 

 to believe Mr. Herbert is the writer of the description, and of the postscript, 

 which we think both judicious and satisfactory. The impropriety of pla- 

 cing C. anguslum as a variety of C. amahile we before alluded to, in our re- 

 marks on that Number of the Botanical Register wherein this has been don e ; 

 Mr. Herbert's remarks on the subject strengthen our own previous opinion. 



Sweet's Geraniacecc. No. 39, 40. 

 A solitary species occurs in No. 39, and it has been already described by 

 several botanists ; it is the Geranium tuberosum of Willdenow and the Hor- 

 tus Kewensis. In No. 40, no one genuine species occurs. 



Recently Published. 

 The Septenary System of generating Curves by continued 

 Motion ; including sundry Observations on the System, and 

 on its Application and Utility in Civil and Naval Architecture, 

 Sculpttire, and those Arts generally, where a fine curved Line 

 is so highly esteemed. By Joseph Jopling. 



Preparing for Publication. 



Mr. Tredgold is preparing for the press an Essay on Heating 

 and Drying by Steam ; in which its Application to warming 

 Buildings, Stoves, Green-houses, Manufactories, &c. will be 

 explained, and compared with other methods of distributing 

 heat. 



A New Edition of the Essays on Mill-work of the late 

 Robertson Buchanan, is in the press; with considerable Ad- 

 ditions on the Teeth of Wheels, the Arrangement of Ma- 

 chinery, the maximum Effect of moving Powers, the Princi- 

 ples of Water-wheels, &c. &c., by the Editor T. Tredgold, 

 Civil Engineer. 



LXVI. Pro- 



