PLATE XXII 
i; i- i.Kip*' 
1. Median longit. section. Camera T.ucida drawing 
2. View of Mouth and surrounding Spines 
li. Longit. sect, of anterior end of body showing pharynx and 
(esophagus 
e.p. = excretory pore ex.v. = excretory vesicle g.p. = 
ov. = ovary ph. = pharynx sh.gl. = shell gland 
4. ■>. 6. Longit. sect, appendicular portion. Camera Lucida drawings 
4. Shows excretory vesicle and pore, and 5. the general disposition, 
of the organs in this region 
6. The exit of the gut-branch into the excretory vesicle 
;enital pore oes. = oesophagus or.s. = oral sucker 
t. = testis vag. = vagina v.s. = ventral sucker 
