688 ON THE ANATOMY AND PHYSIOLOGY OF THE NEMATOIDS. 



Fig. 21. Minute granular cells, which were found distending the cavity of the body in 



a specimen of same species. See fig. 16 also. 

 Kg. 22. Minute almost granular spermatozoa of Theristus acer. 

 Fig. 23. Spermatozoa of Comesoma vulgaris. 

 Fig. 24. Large ovoid spermatic cells of Monhystera vulgaris. 

 Fig. 25. Small ovoid spermatozoa of Enoplus communis. 

 Fig. 26. Motory spermatic filaments of Monhystera dis^uncta. 

 Fig. 27. Spermatozoa of an undescribed marine species. 

 Fig. 28, Portion of intestine of Aphelenchus ^arietinus, showing the indistinct granular 



aspect of its cellular layer, with a very distinct internal bounding membrane. 

 Fig. 29. A group of hepatic cells from intestine of Oncholaimus attenuatus, showing the 



very large size of homogeneous central nuclear bodies, the granules forming 



a lining superficial to these. 

 Fig. 30. Floating gland-cells from general cavity of body of same. 

 Fig. 31. Much larger cells with central nucleus from general cavity of body oi Leptoso- 



matum figuratuwj. 

 Fig. 32. Glandular layer and processes from surface of longitudinal muscles of SymplO' 



costoma longicolle : — a, mass lying on surface of muscle {b); c, c, c, pedunculated 



growths from same, each containing in addition to finely granular matter, a 



central homogeneous body or nucleus (" vacuole ") ; d, secondai-y growth of 



same kind connected by very narrow peduncle with primary ; e, one of these 



bodies with its pedicle torn seen floating freely in cavity of body. 

 Fig. 33. Anterior extremity oi Leptosomatum Jiguratum, showing : — a, a, ocelli on dorsal 



aspect of oesophagus, each containing a rounded lens, imbedded anteriorly ; 



h, oesophageal ring of uncertain nature ; c, c, integumental pores in connexion 



with the lateral bands {d, d). 

 Fig. 34. Portion of lateral band of same species showing a distinctly cellular structure. 

 Fig. 35. Simple granular appearance of lateral band lAnhomosus hirsutus. 

 Fig. 36. Anterior extremity of Cyatholaimus ornatus,\dtXexdl aspect: — a, tubular ventral 



gland ; I, cup-shaped pharyngeal cavity ; c, single dorsal ocellus ; d, d, ceUs 



of deep cutaneous layer (■?). 



