5 1 8 ORDER HOLOTRICHA . 



to the body, the more attenuate anterior portion to the neck, while the conical 

 extremity, separated off by the annular ciliated groove or furrow, may be said to 

 represent the cork. Under the name of Lacrymaria versatilis Quennerstedt * has 

 figured and described a marine animalcule which agrees closely with the form under 

 notice, excepting that its contour is slightly more slender and attenuate, the length 

 equalling as much as six times that of the greatest breadth. It has the same elon- 

 gate, bottle-shaped contour ; the cuticular surface is obliquely channelled or striate 

 in a similar manner, and the endoplast and contractile vesicle correspond similarly 

 in both character and position. Quennerstedt proposes to identify this variety, or 

 possibly independent type, with the Trichoda versatilis of O. F. Miiller, which is, 

 however, undoubtedly rightly referable to the preceding genus. This is shown both 

 by Miiller's description in the following terms of the movements of the animalcule 

 in the water : " Motus natando celerrimus, collum hinc et illinc pro lubilu dirigit" 

 and by his additional indication in the figures of the species of the attenuate and 

 extensile character of the neck. 



Lacrymaria coronata, C. & L. PL. XXVII. FIG. 28. 



Body elongate-clavate, slightly narrowed anteriorly, nearly five times as 

 long as broad ; two ciliary circlets developed around the apical extremity, 

 the anterior one bearing the longest cilia, each occupying an annular 

 groove or furrow; surface of cuticle obliquely striate, entirely and finely 

 ciliate ; contractile vesicle spherical, postero-terminal ; endoplast elongate, 

 band-like. Length of body 1-150". 



HAB. Salt water, Norwegian coast. 



The double circlet of cilia at the apical extremity and band-like form of the 

 endoplast, independently of the greater porportionate length of the body, assist in 

 distinguishing this type from the preceding one. The characteristic apical region 

 only of this animalcule is delineated in the accompanying figure. 



Lacrymaria Cohnii, S. K. PL. XXVII. FIGS. 25-27. 



Body highly elastic and changeable in form, when extended oblong 

 cylindrical, slightly broader and somewhat truncate anteriorly, about four 

 times as long as broad, contracting from this to an almost spherical con- 

 tour, the posterior third often flattened out and twisted like the blade of a 

 ship's screw ; surface of cuticle finely ciliate throughout, faintly striate lon- 

 gitudinally ; body usually opaque through the enclosure of numerous fat- 

 like corpuscles; contractile vesicle largely developed, postero-terminal. 

 Length 1-240". HAB. Salt water. 



The above specific title is herewith conferred upon the form figured and described 

 by Cohn, in his 'Neue Infusorien im Seeaquarium,' 1866, under the title of Lacry- 

 maria lagenula C. & L. From this last-named type it is evidently totally distinct. 

 The flask-like contour, with a tapering anterior extremity distinctive of that form, 

 would appear to be never assumed by the present animalcule, but in its place a highly 

 remarkable screw-like shape, which would scarcely have escaped the attention of 

 Claparede and Lachmann in connection with their species ; the surface of the cuticle 

 in Cohn's type is, further, entirely wanting in that conspicuous oblique striation, 

 and the general substance of the body would appear to be much more soft and con- 

 tractile. The figures given by Cohn, here reproduced, entirely support the views here 

 held relative to the invertile nature of the apical portion of the conical anterior 



* ' Sveriges Infusoriefauna," tab. i. fig. 5, 1867. 



