ON THE ANGUILLULIDÆ. 119 
eireular markings of integument 1357 from anterior extremity, by narrowed portions 
rss in length, with delicate vessels from 10500 to yoyo” broad. 
Male, not seen. 
Hub. Hemispherical tufts of moss (Tortula) on the roofs of old houses or walls, and 
also from the yellow lichen (Parmelia parietina), Broadmoor, Berks. 
9, P. crRRATUS, n.sp. (Plate X. figs. 81, 82.) 
Female, length 415", breadth 433". 
External Characters.—Body slender, tapering at both extremities, especially pos- 
teriorly. Head rounded, provided with a circle of four very short cirri, about 15400" 
long. Integumental stri? 55060 apart, transverse. 
Pharyngeal cavity slightly dilated at first, then long and narrow, length being about 
gis’. Csophagus less than {th of total length. Intestinal cells not well marked, and 
containing but few fat-particles. Anus 144” from posterior extremity. Vulva slightly 
posterior to the middle of body. Duct of excretory gland opening opposite middle of 
esophagus. Lateral vessels commencing at 1955 from anterior extremity. 
Male, not seen. 
Hab. About lower decaying leaves of Myriophyllum verticillatum, pond, Bagshot. 
3. P. TENUIS, n.sp. (Plate X. figs. 83, 84.) 
Female, length 45", breadth 100 - 
External Characters.—Body white, slender, tapering very slightly anteriorly and pos- 
teriorly. Head rounded, naked. Integumental striæ transverse, almost imperceptible, 
80000 apart. 
Pharyngeal cavity ;lg" long. Œsophagus more than ith of total length. Intestinal 
cells containing but few light-coloured fat-particles. Anus 575 from posterior extre- 
mity. Vulva at the middle of body. Æxcretory duct opening at r5” from anterior 
extremity. Lateral vessels commencing at cireular markings 3060 from anterior ex- 
tremity. 
Male, not seen. : 
Hab. In transparent gelatinous matter, with Vorticella chlorostigma, from the shady 
margin of a lake, Sandhurst. 
4. P. VELOX, n. sp. (Plate X. figs. 85, 86.) 
Female, length 3;”, breadth 415". 
External Characters.—Body white, tapering anteriorly and posteriorly, especially in 
the latter direction. Head rounded, unarmed. Integumental striæ transverse, 55650 
apart. 
Pharyngeal cavity -05 5 long. @Œsophagus ith of total length. Intestinal cells in- 
distinctly marked, containing very few light-coloured particles. Anus 555 from pos- 
terior extremity. Vulva slightly posterior to the middle of body. Exeretory duct 
Opening at +1,” from anterior extremity. Lateral vessels commencing at 54,54" from 
anterior extremity. 
Male, not seen. 
Hab. From moss with 7. Davaineii, Falmouth. 
