134 



THE AMERICAN MONTHLY 



[July, 



somewhat lateral opening in front, 

 from which the nagclla project, 

 above this a somewhat prominent 

 keel. L. 0.022. Movement wag- 

 ging and trembling. In stagnant 

 water, with chara, sometimes abun- 

 dant, 



4. Gen. TetraselTiiis. Under this 

 name I place, in spite of my objec- 

 tions to the making of species, a 

 form which I have only once seen, 

 but the several specimens were of 

 quite constant shape. The body is 

 slender, conical, with an anterior de- 

 pression from which four flagella 

 project. It is not identical with 

 Oxyrrhis, Duj., and I cannot re- 

 gard it as an alga-spore. 



T. cordata, n. g. et sp. Body 

 green on the sides, colorless, in the 

 middle. L. 0.02. In fresh water, 

 among^ alga?. 



5. Gen. Tryj)omonas, Pty. {Trcu- 

 cJielomonas^ Ehr.) Carapace spher- 

 ical or ovoid, rough or spinous ; in 

 old forms brown, opaque, brittle, in 

 younger condition clearer. The soft, 

 metabolic body is furnished with a 

 flagellum and generally with a red 

 pigment spot. Usually it tills the 

 carapace, but at a certain time it 

 separates from the walls, shrinks 

 somewhat and rotates within the 

 carapace. Finally, the latter breaks, 

 the animal escapes and then resem- 

 bles an Euglena viridis with its 

 flagellam lost. Division often takes 

 place within the carapace. 



T. volvocina, Ehr. Yery chan- 

 geable in form, size and roughness 

 of the surface. In the middle d.- 

 9.025. Movement rolling. Common 

 at all times of the year among 

 algag, especially in green-colored 

 water. 



Chmtotyjpla armata, Ehr., with 

 long tail behind, cannot well be re- 

 garded as a species distinct from 

 the preceding. 



6. Gen. LageneUa, Ehr. {Cryjo- 

 tomonas, Duj., Choneinonas^ P'ty, 



with stigma Choetoglena, Ehr.) 

 Differs from the preceding genus 

 by a short, cylindrical neck on the 

 anterior end of the carapace. 



L. euehlora^ Ehr. Carapace 

 rounded behind. L. 0.02. Among 

 algse, not abundant. 



L. acuviinatwm^ Pty. Carapace 

 terminating in a tail. 



EBITORIAL. 



Adulterations. 



For nearly two years the editor 

 of this Journal has been studying 

 the subject of adulterations, with 

 particular reference to the detection 

 of adulterations in articles of food, 

 by means of the microscope. Dur- 

 ing this time he has accumulated a 

 large number of notes and memor- 

 anda relating to the subject ; and 

 some time ago these were carefully 

 written up, with the intention of 

 publishing them in book form. 



Yarious circumstances have con- 

 spired to prevent the completing of 

 the manuscript, and the difficulty 

 and uncertainty of finding a pub- 

 lisher who would undertake to issue 

 such a book, at one time led the 

 author to abandon the idea of fin- 

 ishing the work. However, the in- 

 terest which has lately been aroused 

 in the subject of adulteration by 

 articles in the daily papers, and 

 elsewhere, has induced him to re- 

 vise and complete the manuscript ; 

 many parts will be re-written 

 so as to make the work more popu- 

 lar in character, and he now pro- 

 proposes to publish the book him- 

 self. This plan will be carried out 

 only on condition that a sufficient 

 number of orders can be secured in 

 advance, to make the work remun- 

 erative. All who desire to take a 

 copy, are therefore requested to 

 send their orders to the editor at an 

 early day. The book wnll be pub- 



