ON THE ANGUILLULIDÆ. 123 
of which are rounded. Head having no setze or papillæ. Caudal sucker none. Inte- 
gumental striæ transverse, 556000 apart, easily visible. 
Dart 14955 long, simple, not knobbed at the base. Œsophagus j';th only of total 
length, having a globular and distinctly muscular terminal swelling, 1065 broad. Jn- 
festine, portion next cesophagus very indistinct; granules scattered, rather coarse and 
colourless. Anus sis from posterior extremity. Vulva posterior to commencement of 
hinder third of body, 7y” from posterior extremity. Æxcrelory duct opening slightly 
posterior to commencement of intestine. 
Male, not seen. i 
Hab. Between the lower sheaths of leaves of oats from stubble-field, Broadmoor, Berks. 
9, À. VILLOSUS, n. sp. (Plate X. figs. 99-101.) 
Female, length 45", breadth 1900 - 
External Characters.—Body tapering very slightly anteriorly, but narrowing to a point 
posteriorly ; shaggy from the presence of a hair-like fungus (?) growing on integument. 
Sucker (?). Head rounded, naked. Striæ transverse. 
Spear 5255 long, simple. Œsophagus th of total length; terminal muscular swell- 
ing 5050 in diameter. Intestine sparingly covered with granules. Anus 1000 from 
posterior extremity. Vulva at commencement of posterior third of body. Exeretory 
duct opening at 545 from anterior extremity. 
Male, length 45", breadth 1067 . 
Anus about the same position as in female. Spicules teso long, narrow, curved, 
slightly knobbed at upper extremities. 
Hab. With Plectus parietinus, in tufts of moss ( Tortula), Broadmoor, Berks. 
3. A, PARIETINUS, n.sp. (Plate X. figs. 102, 103.) 
Female, length 35", breadth 314". 
External Characters.—Body pellucid, tapering very slightly forwards, but to à point 
backwards, where it appears to terminate in a sucker. Head almost truncate. Trans- 
verse strie 30000 apart. - | 
Spear simple, 3455" long. (Esophagus j,th of total length ; terminal swelling 555 = 
in diameter. Intestine covered by a few scattered granules; internal tube well seen. 
Anus 745” from posterior extremity. Vulva at commencement of posterior third of 
body. Excretory duct opening at z5 from anterior extremity. 
Male, not seen. 
Hab. With Pleetus parietinus, in patches of yellow lichen (Parmelia parietina), Broad- 
moor, Berks. 
4. A. PYRT, n.sp. (Plate X. figs. 103 4-103 c.) 
Female, length 25”, breadth +255”. 
External Characters.—Body naked, pellucid, filiform, tapering slightly at both extre- 
Mities; sucker doubtful. Head narrowed, rounded. Integumental striæ not visible. 
Spear simple, +355” long. (Esophagus ygth of total length; terminal swelling large, 
Too in diameter. Intestine very sparingly covered with a few o granules. 
R 
