ON THE ANGUILLULID^. 107 



marked off by a constriction from the rest of the body. Integument with longitudinal 

 striae toooo" apart. 



Spear -^" long. QHsophagus about |th of total length ; anterior half narrow, posterior 

 much wider. Intestinal cells not having tessellated arrangement, but well filled with 

 rather small fat-particles. Anus 5-^0" from posterior extremity. Vulva slightly posterior 

 to middle of body. 



Male not seen. 



Hab. Amidst rich mould and decaying leaves, from a damp and shady wood, Falmouth. 



4. D. TENTJICATJDATUS, n. sp. (Plate IX. figs. 43, 44.) 

 Female. Length ^", breadth 3-g-o". 



External Characters. — Body tapering very gradually anteriorly, but rapidly behind anal 

 cleft, where it terminates in a long filiform extremity. Head truncate, furnished with 

 two small papillae. Integument with longitudinal markings. 



Spear g^" long. (Esophagtis about yth of total length,- posterior half enlarged. Intes- 

 tinal cells well marked. Anus y^" from posterior extremity. Vulva slightly posterior 

 to the middle of body. 



Male not seen. 



Hab. Eine sandy mud from pond, Tunbridge Wells. 



5. D. TRiTici, n. sp. (Plate X. figs. 45-47,) 

 Female. Length ■^' , breadth 3^". 



External Characters. — Body white, tapering very slightly anteriorly, and not at all 

 posteriorly, where it is blunt and rounded. Head bluntly rounded, marked ofi" by a con- 

 striction ; no papillae. Integumental markings not apparent. 



Spear 3-J3" long. (Esophagus rather less than ^rd of total length, posterior half en- 

 larged. Intestinal cells having a tessellated arrangement, and containing light-coloured 

 fat-particles. Anus -g^g" from posterior extremity. Vulva slightly posterior to middle 

 of body ; segments of uterus very short, extending only about xi^" on either side of 

 vagina. 



Male. Length ^", breadth -gJo". 



(Esophagus much shorter than in female. Anus xwo ' f^^om posterior extremity. 

 Spicules 6^" long. Suckers 9, mid-ventral, the first being 4^" above anus, and the 

 others being equidistant and awo" apart. 



Sab. About the roots of wheat growing in a sandy soil, and also between the lower 

 sheaths of its leaves : Broadmoor, Berks. 



6. D. FiTiiFOKMis, n. sp. (Plate X. figs. 48, 49.) 

 Female. Length y^", breadth 5-^0" • 



External Characters. — Body very long and slender, tapering only slightly anteriorly, 

 but considerably posteriorly, where it terminates in a fine point. Head truncate ; no 

 papillae. Integumental markings not visible. 



SpeaK y^" long. (Esophagus ^th of total length, posterior third enlarged. Intes- 



p2 



