Earring (& Myers—Rotifer Fauna of Wisconsin — 11. 477 
vol. 11, 1904, p. 44, pi. 3, fig. 21; Siisswasserfauna Deutschlands, pt. 14, 
1912, p. 103, fig. 192.— De Beauchamp, Arch. Zool. Exper.,- ser. 4, vol. 6, 
1907, p. 8, fig. 4.— Von Hofsten, Arkiv ZooL, Stockholm, vol. 6, No. 1, 
1909, p. 16, fig. 1.— Mola, Ann. Biol. Lac., vol. 6, 1913, p. 244,— 
Jakubski, Eozpr. Wiad. Muz. Dzieduszyckich, vol. 1, No. 3-4, 1915, p. 18. 
—Weber and Montet, Cat. Invert. Suisse, pt. 11, 1918, p. 117. 
Bistemma laeve Eichwald, Bull. Soc. Imp. Nat. Moscou, vol. 20, 1847, pt. 
2, p. 343, pi. 9, fig. 4. 
Furcularia tuhiformis King, Journ. Quekett Micr. Club, ser. 2, vol. 5, 1893, 
p. 139, pi. 8, figs. 1-5. 
Furcularia triliamata Stenroos, Acta Soc. Fauna et Flora Fennica, vol. 17, 
No. 1, 1898, p. 133, pi. 2, fig. 14. 
Notops falcipes Linder, Kev. Suisse Zool., vol. 12, 1904, p. 238, pi. 4, fig. 6. 
Cephalodella forficula Barring, Bull. 81 U. S. Nat. Mus., 1913, p. 25. 
The body is spindle-shaped, elongate and fairly slender. The 
head is relatively large and slightly oblique anteriorly. The neck 
is marked by a shallow constriction. The anterior half of the ab¬ 
domen is very nearly cylindric, the posterior slightly tapering; the 
integument is very flexible and the characteristic, discontinuous 
lorica seems to be totally lacking. The foot is ill-defined, but a 
slight basal constriction is usually present; the tail is small, but 
fairly prominent, and belongs to the abdomen rather than to the 
foot. The toes are short, stout, recurved and acutely pointed; the 
bases are somewhat swollen and near mid-length there is on the 
dorsal side a prominent, toothlike spine, preceded by a transverse 
row of small, acute spicules, from two to four in number. The 
length of the toes is about one fifth of the total length. The foot 
glands are very long and slightly clubshaped. 
The corona is slightly oblique and convex without projecting lips. 
The mastax is relatively large and of the normal type; the inner 
edges of the rami are serrate at the apex; the fulcrum is very 
slightly expanded at the posterior end. The manubria are some¬ 
what unusual on account of the presence of a well developed, oval 
basal plate; the posterior ends are very slightly enlarged, but not 
crutched. The gastric glands are small. There is a very faint con¬ 
striction between the stomach and intestine. 
The ganglion is elongate and saccate; no retrocerebral organ is 
present. The eyespot is frontal and of somewhat unusual struc¬ 
ture; its anterior half is transparent and the posterior pigment 
mass is divided into two segments by a median, clear space. 
Total length 160-165/x; toes 30-35ja; trophi 45/x. 
