C,6 Analysis uf Pci ioJical WorJcs 



to us, that there has been aheady a needless creation of sjjecies, 

 which should be more properly considered as varieties. This 

 may have been the case prior to the commencement of our 

 monthly analysis of this work ; but we do not think the charge 

 is applicable to any subjects we have noticed since that period. 

 In this Number the descriptions deficient in the lastare supplied, 

 and the following additional plates given. PI. 378, three new 

 species of Cijprtvn from the Suffolk crag, characterized on the 

 authority of the Rev. S. R. Leathes. They are named C coc- 

 cifielloidcs, refusa, and Avellaiw. May not the two last represent 

 the same species? their only difference is size, and in the dorsal 

 sulcation of the last, which the former does not possess ; but 

 this we know is not always a specific character. PI. 379. Au- 

 ricula pyramidalis, a shell whose genus we consider as uncer- 

 tain. PI. 380 and 381. Plagiostoma Hoperi, and nisticum. 

 PI. 382. P. l^viuscul/nn, from the Pisolite of Malton. PI. 383. 

 Gri/j^/icen Columba of Lamarck, and G. nana from the clay at 

 Shotover. 



So'werby's Genera of Shells. No. 10. 



DoNAx; accompanied by excellent figures ofZ). Scorttim, cie- 

 iicaia, Trun cuius and deltoides ; Ungulina, a genus of Daudin, 

 instituted on rather a slight foimdation. Capsa; another 

 genus of the French conchologists, with even less pretensions 

 than the last, as it differs fi-om Donax so slightly, that we think 

 it should only form a division under that genus. Tubicinella, 

 well distinguished by Lamarck, and formed of the Lepas tra~ 

 chcceformis. Erycina, with very good figures of the following 

 species, the two first of which are stated to be new : \. IE. com- 

 ])lanata testa ovata, compressa, subinaefjuilatera, Isevi, epider- 

 mide olivacea induta, concolore. 2. E. striata testa eequilatera, 

 subtrigona, compressa, costLs plurimis, confertis, transversis, 

 antice rigidis. 3. E. plebcia is stated as the Donax plebeia 

 of English authors. Navicella; a fresh water genus resem- 

 bling a Linnaean Pufella, but having an operculum. 



Curtis^ s Botanical Magazine. No. 431. 



We have not in this Number a single new plant. 



Plate 2364 represents Ardisia panicidata, with very good 

 dissections of the flower. Elichrysum prolifcrum., a plant well 

 known, but vei'y beautifully figured. Tlmnbergia grandijlora, 

 Justicia pedunculosa (the J. Americana of Willd. and Hort. 

 Kew.), Ribcs mtdtijlorum, and Aloe acinacifulia, terminate 

 this Number : respecting the last, Dr. Sims has not adopted 

 the recent distribution of this ovei'grown family into separate ge- 

 nera, 



