mVERTEBRATA, CRYPTOGAMIA, MICROSCOPY, ETC. 291 



NyctotJierus ovalis. At that time he had viewed it as a young form 

 of a Gregarina, and had intended giving it and other parasites of the 

 cockroach more critical examination, but failed to do so. The para- 

 sitic amoeboid which Biitschli described under the name of Amceba 

 Blattce is particularly interesting, on account of its habits and its 

 somewhat peculiar character. Professor Leidy had recently examined 

 some cockroaches, and found abundance of the amoeboid in association 

 with NyctotJierus ovalis, LopTiomonas Blattarum, Oxyurus gracilis, and 

 0. append! culatus, and an algoid plant. 



The amceboid, he thought, was worthy of generic distinction from 

 the true Anuvha, holding a position between this and Protamceba. 

 From the former it differed in the absence of a contractile vesicle, and 

 commonly also of vacuoles, and in the want of differentiation of endo- 

 sarc and ectosarc, and from the latter in the possession of a well- 

 defined nucleus. He proposed for it the following name, with dis- 

 tinctive characters : — 



Endamoeba. 



General character and habit of Amoeba ; composed of colourless, 

 homogeneous, granular protoplasm, in the ordinary normal, active con- 

 dition, without distinction of ectosarc and eudosarc ; with a distinct 

 nucleolated nucleus, but ordinarily with neither contractile vesicle nor 

 vacuoles. 



Endamoeba Blattce* — Initial form globular, passing into spheroidal, 

 oval, or variously lobate forms, mostly clavate, and moving with the 

 broader pole in advance. Protoplasm finely granular, and when in 

 motion more or less distinctly striate. Nucleus spherical, granular, 

 with a large nucleolus. Distinct food-particles commonly few or 

 none. Size of globular forms • 054 mm. to • 075 in diameter ; 

 elongated forms 0-075 by 0-06 to 0*15 by 0-09 mm. Parasitic in 

 the large intestine of Blatta orientalis. 



The Endamoeba Blattce affords a good example of a primitive, 

 active, nucleated organic corpuscle, or a so-called organic cell without a 

 cell-wall. In the encysted condition it would be a complete nucleated 

 organic cell. It may bo recommended as a convenient illustration of 

 a primitive form of the organic cell, on account of its comparatively 

 ready accessibility. 



BOTANY. 



A. GENERAL, including Embryology and Histology 

 of the Phanerogamia. 



EflFects of uninterrupted Sunshine on Plants, t — Professor 

 Schiibclcr, of Christiania, lias rccordtsd tlic results of a scries of 

 observations for the purj)oso of ascertaining the effect produced by 

 the almost unbroken sunlight of the short Scandinavian summer on 



♦ " Eino Art rrntciis,' Sicbnld, ' Bc-itr. Nnturp. wirb. Thiere,' lS39,/f/<- Stein ; 

 " Am<Jlx;nlorm," Stein, ' Organismus d. Iiifii^innBtiiicrc,' 1S(;7, ii. p. 345; "Anwcba 

 BlaWc," IJiitaohli, Inc. cit. 



t ' Naturo,' xxi. (1880) p. 311. 



u 2 



