Verm. 1 
VERMES. 
BY 
C. F. Lutken, Ph.D., F.K.D.A., &c. 
I. ROTATOEIA. 
1. Claus, C. Ueber die Organisation und die systematische Stellung 
der Gattung Seison. (Festschrift, z.-b. Ges. Wien) 14 pp., 2 pis. 
2. Davis, H. On the Rotifer Conochilus volvox. M. Micr. J. xvi. pp. 
1-5, pi. cxliii. 
3. Kramer, — . Fine Bemerkung iiber ein Raderthier aus der Familie 
der Asplanchneen. Arch. f. Nat. xlii. pp. 179-182, pi. viii. figs. 1-4. 
4. Smith, F. H. On Animal Life in Water containing free acids. Mem. 
Soc. Manch. (3) v. pp. 185-191. 
According to Stein (Tagebl. d. Leipz. Nat. Vers. 1872, p. 140), who 
is acquainted with the asplanchnous males of 13 highly different genera 
of Rotatoria, the sexual dimorphism is a general phenomenon in all true 
Rotatoria. The intestine, though unable to perform its normal func- 
tions, is generally present in the shape of a shrivelled string, serving as 
attachment to the testis. The “ lime sac ” of the Rotatoria is probably 
a poison-gland. The segmentation of the egg of Lacinularia is described 
by Fleming (SB. Ak. Wien, Ixxi. pp. 101-104) in a manner remind- 
ing much of analogous observations in Nematoda, MeduscB, &c. 
PoGGEN POL’s description (in N. Mem. Mosc. x. pp. 9-13) of a social 
Rotatorian allied to Conochilus : Strophosphccra ismailoviensis (g. & sp. 
nn.), is only known to the Recorder from R. Leuckart’s “ Jahres- 
bericht,” 1872-1875 (Arch. f. Nat. xxxix. pp. 475 & 476). 
In the abnormal genus, Seison, Gr. (Saccohdella, V. Ben. & Hesse), 
parasitic on Nebalia, the body is divided into 4 portions, 2 dilated (head 
and abdomen) and 2 narrow (head and tail, the latter corresponding to the 
“ foot in Rotatoria, and terminating in an adhesive organ) ; in the “neck ” 
and “ tail ” (in S. annulatus, also in the abdominal portion) the thin chiti- 
1876. [voL. xm.] j 1 
