I9I4-J ^- H. Stewart : Indian Hel/mnthology, No. II. 



197 



covering of the outer wall of the suckers (PL xxix, fig. 18) where 

 minute point-like nuclei occur. The ectoderm rests on a fibrillar 

 basement membrane , beneath which lies the loose connective 

 tissue in which the organs of the body are embedded. 



Nervous System. — The central nervous system is composed of 

 a ring surrounding the second phar3mx. The dorsal portion of 

 this ring lies at the junction of the first with the second pharynx 

 (PI. xxvii^ fig. 4) and contains six to eight large ganglion cells. 

 The ventral portion of the ring lies somewhat further back (PI. xxvii, 

 fig. 6). The lateral portions (PI. xxvii, fig. 5) give off stout nerves 

 to the margins of the body. Two dorsal, two lateral, and two 

 ventral longitudinal nerve cords are present. (PI. xxix, fig. 14, 

 d.n.c, l.n.c, v.n.c. , and PI. xxvi, fig. i v.n.c.) 



Reproductive Systeryi. — In regard to the reproductive system, 

 the two specimens at the disposal of the present writer are as 



.Ar.t u.ter J.u.cf /L^ ,1. 



/'9"- 



v*s ie{ <^>^i 



Fig. 2. — Diagram of the reproductive organs as seen from the dorsal surface 

 in specimen No. 2. A portion of the vas deferens is assumed to have been 

 removed to show the underlying- female organs. Portions only of the longitudinal 

 yolk ducts are figured. 



mirror images the one of the other. The ovarj^ is situated on the 

 right side in specimen No. i which is represented in figure i of 

 Plate xxvi and on the left side in the second specimen from which the 

 drawings of sections have been made. In the following descrip- 

 tion the condition of the second specimen is taken as the model. 



The male organs. — The testis is a broad, flat and lobulated 

 organ (PI. xxvi, fig. i te.) 2 '2 mm. in length and i mm. in breadth, 

 lying in the median third of the body directly under the ventral 

 epithelium. The vas deferens (PI, xxviii, fig. 13. PI. xxix, 

 figs. 14-16 v.d. and text-fig. 2) after gaining the dorsal segment of 

 the body runs forward in the midline. When it approaches 

 within a short distance of the genital atrium it expands some- 

 what to form a seminal vesicle (PI. xxviii, figs. 8, 9, 10, 12 s.v.) 



