OF THE NEMATOIDS, PAEASITIC AND FEEE. 635 



Fig. 22. Transverse section of a female specimen of Filaria, from the subcutaneous 

 tissue of a water-bird: — a, a, rather broad, flattened lateral bands, in which 

 no vessels could be detected ; h, intestine ; c, c, c, three oviducts filled with 

 ova ; d, three narrower extremities of same ovarian tubes. 



PLATE XXVII. 



Fig. 1. Anterior extremity of Prothecosacter inflexus, dorsal aspect: — a, oesophagus; 



i, i, lateral cervical pores ; c, c, lateral bands. 

 Fig. 2. Posterior extremity of female specimen of same, ventral aspect: — a, a, latero- 



ventral caudal pores ; b, b, terminations of lateral bands. 

 Fig. 3. Anterior extremity of same, lateral aspect: — a, triangular mouth in centre of 



somewhat flattened circular space ; b, mid- ventral pore with an infundibuli- 



form opening ; c, right lateral band ; d, process given off from same to ventral 



pore, in which, however, no vessel could be detected. 

 Fig. 4. Transverse section of same slightly posterior to the termination of oesophagus : — 



a, a, lateral band ; b, b, almost imperceptible median lines ; b', b', b', b', equally 



indistinct accessory longitudinal lines ; c, c, intestinal canal held in position 



by fibrous processes; e, e, surface projections of integument corresponding 



with superficial markings. 

 Fig. 5, Transverse section of muscle-cells and integument of same, showing : — a, thick 



homogeneous chitinous portion of integument ; b, very thin cellulo-granular 



layer of same ; c, deep and very narrow muscular elements. 

 Fig. 6. Highly refractive particles filling the anterior part of general cavity of body of 



some specimens. 

 Fig. 7. Portion of integument, showing nature of its surface-markings due to ridges or 



minute elevations. 

 Fig. 8. Lateral aspect of anterior extremity of Strongylus filaria, with the two ventral 



glands {a) dissected out, and showing the manner in which they are coimected 



with the single median pore. 

 Fig. 9. Posterior extremity of same :— a, lateral band ; b, b, caudal pores here upper and 



lower instead of lateral ; c, anal cleft. 

 Fig. 10. Portion of integument of a red-coloured Strongylus from the stomach of a Hare, 



showing its longitudinal and transverse markings. 

 Fig. 11. Anterior extremity of Cucullanus heterochrous (Dacnitis esuriens, Duj.), lateral 



aspect : — a, mid-ventral pore ; b, sac in connexion with same ; c, d, anterior 



and posterior branches on left side in connexion with sac, in which are seen 



molecules suspended in a clear fluid; anterior branch terminating ciecally 



opposite pharynx (e) ; f, oesophagus ; g, intestine ; h, fibrous band (probably 



nervous) surrounding oesophagus in this situation. 



4s2 



