303 



der k. k. Zool. bot. Gesellsch. Wien,' band x, 1860, p. 516, t. i, 

 fig. 4. This author expresses an opinion that the form so de- 

 scribed may be only a variety of ISfav. Uber, W. Sm., but Mr. 

 O'Meara, after a careful comparison of the two forms, was not 

 disposed to consider the affinity between them so close, and 

 thought he was sustained in this view by the following remarks of 

 Cleve : — " Grunow has not described tlie front view/ which in the 

 specimen I had the opportunity of examining was cuneate in 

 outline (kilformig), as in the case of Gomphonema and Novilla, 

 for which reason this species ouglit to be referred to a new genus 

 distinguished from Navicula by the cuneate outline of the front 

 view." Cleve, " om Svenska ocli Norska Diatomaceer." ' Ofversigt 

 af Kongl Vetenskaps Acadamiens Forhandlingar,' Stockholm, 

 1868, taf iv, figs. 3, -1. Only two examples of this interesting 

 species occurred upon the slide, one perfect, the other a fragment ; 

 in neither was the front view exhibited. 



Mr. Archer presented numerous and fine living examples of a 

 remarkable form, from the fresh water, which for the present he 

 must relegate to the Khizopoda, though presenting such an extra- 

 ordinary resemblance to Cienkowski's lately established "family " 

 (or " class " ?), Labryinthulea, as to render it exceedingly probable 

 that in that group (be their actual nature and affinities what they 

 may) the present form should find a place. In Schultze's ' Archiv 

 fur Mikroskopische Anatomic,' bd. iii, p. 274, t. XV, XVI, XVII, 

 in a memoir entitled ' Ueber den Bau und die Entwickelung der 

 Labryinthuleen,' Cieukowski has given an account of a type or 

 group of sarcodic beings named as above, and founded on two 

 forms discovered by him, amongst alg£e, on piles in the harbour of 

 Odessa. These organisms, as stated by that author, are character- 

 ised by the possession of three principal portions or constituents, 

 the central mass, the spindles, and the filamentary tracks (which 

 last term Mr. Archer thought might be a convenient and suitable 

 translation of the word " Fadenbahn," employed by Cienkowski). 

 It would be out of place here, inasmuch as to do it satisfactorily 

 would take up too much space in making this for the present but 

 fugitive record, to give a resume of Cienkowski's account of these 

 organisms ; a brief reference has already appeared at the time 

 in the pages of this Journal (' Quart. Jour. Micr, Sci., vol. vii, p. 

 277) ; those who may take an interest in the matter will refer to 

 Cienkowski's paper itself Suffice it here, for the present, to 

 state that the organism now shown by Mr. Archer presented the 

 above three characteristics, with some minor difi'ereuces in detail. 

 We have here, then, the " central body-mass," the " spindles," and 

 the " filamentary tracks," the difierences alluded to being, 1st, 

 that whereas the spindles in Cienkowski's two marine species are 

 described as nucleated, these bodies, in the present form, are not 

 nucleated ; 2ud, that the total body-mass presents the remarkable 



' "Sidoytan" (tbe side view) of Cleve = to i\\e front view in cm' phrase- 

 ology. 



