Loxogenes arcanum Nickekson. 291 



Explanation of the Plates. 



All the figures, unless otherwise stated, are from drawings made with 

 Bausch and Lome, Abbe Camera Lucida. 



cir. s cirrus sack pr prostate unicellular glands 



d.j ejaculatory duct s. c sub-cuticula 



ex.po excretory pore nt uterus 



int intestine rg vagina 



nui muscles vs ventral sucker 



OS oral sucker vt vitellaria 



par parenchyma x sub-cuticle cells at excretory pore 



jih pharynx 



Plate 24. 



Fig. la, b, c, and d, free hand drawings of four successive body- 

 outlines, from a living specimen, in salt solution, from dorsal surface. 

 In a, the genital pore is shown, and loops of the uterus are seen through 

 the body wall. 



Figs. 2 and 3. Ventral and dorsal aspects of L. nrcanuiu, drawn, 

 with aid of Camera Lucida, from alcoholic specimens after GiLSON fluid 

 fixation. The cordate outline posteriorly, and asymmetry anteriorly, oral 

 and ventral suckers, genital and excretory pores are seen. 



Fig. 4a, b, c, and d, parts of different sections from a sagittal 

 series from a pyloric cyst worm combined as if all were located in the 

 same plane to show the mutual positions of some of the chief parts. Cam. 

 Luc. Zeiss 2 D reduced ^/g, scale in drawing = 0,1 mm. 53 : 1. 



Fig. 5. From a transverse section in the level of the genital pore 

 and outer ends of the ejaculatory duct and vagina, to show the relation 

 of the linings of the genital ducts to the outer cuticula. Cam. Luc. Zeiss, 

 oc. 2, B. and L. ob. ^/^ in reduced Vo» scale 0,01 mm. 150 : 1. 



Fig. 6. A small part of the outer layer of the wall of the vagina, 

 from the region of v, of figure 5, to show the papillae and spines of the 

 cuticula, GiLSON, Iron-haemat., oil immersion. Cam. Luc. scale 0,01 mm. 

 600: 1. 



