522 SEBASTIANO PIOYANELLI ON TWO NEW BDELLOIDA. 



Anomopus, a new genus of the Family Philodinadae. 



Gen. Ch. — Eyeless. Rostral lamellae present. Foot long, ter- 

 minated by perforated adhesive disc. Spurs very small. Foot- 

 glands built up of longitudinal series of cells, ducts not enclosed 

 in a capsule. 



A. TELPHUSAE, U. Sp. 



A smooth, elongated, flexible form, with dorsal and lateral 

 longitudinal folds. Average length of adults, 600 /x; one excep- 

 tionally large individual, 738/x, Corona very wide, 120;it; width 

 of collar, lOOyu.; of narrowest neck joint, 62 yu.. Sulcus shallow, 

 about 41/x wide. Upper lip arched towards mouth, extending 

 almost to the level of the discs, and sloping gently on each side 

 down to a slight median notch or groove. Antenna stout, ter- 

 minated by short setae, narrowed near base, resting on a flange ; 

 length, 21yLt. Rami formula, 1 + Y^ + 1; length, 29/>i; maxi- 

 mum width of each ramus, 12/>t. Foot very characteristic, of five 

 joints, slender, very long, 132/x, the second joint rather the 

 longest and having a ring-like thickening of the hypodermis 

 about its middle. The narrow and elongate anal and preanal 

 segments increase the apparent length of the foot. Spurs wide 

 apart (interstice, 21/x), apparently perforate, rounded, almost 

 pimple or nipple-shaped, with a slight basal constriction, exter- 

 nally about 3 /A long, but having the appearance of being 

 prolonged for several times their own length within the foot joint, 

 which extends some way below them. Adhesive disc circular, 

 19yu, diameter, pierced by numerous minute (less than 1/x 

 diameter) perforations. 



Only one series of large cells (length of largest, 35/x ; diameter 

 of nuclei, 7/x) is clearly discernible as constituting each foot- 

 gland, which extends some way above the anus into the 

 trunk. 



This species is frequently attacked externally by a saprophytic 

 Cladothrix, which is sometimes in isolated hairs on the skin 

 sometimes in tufts, and sometimes forms a furry coating. 



Commensal in the branchial cavities of TeVpliusa Jluviatilis 

 Lmk. 



Journ. Qackttt Microscopical Clvl.; Ser. 2, Vol. VIII., So. 53, November IfOS. 



