some neio Species of Drawida. 535 



Plate XVII. 



Fig. 7. Vertical section of skin of Z). somavarpatana through the aeta- 

 follicle, showing the group of tall sensory cells which form 

 the white papilhe round the seta {ab). 



Fig. 8. Vertical section through prostomium of D. sotnavarpatana, 

 showing groups of two iduds of sensory cells. The nerve- 

 fibres in both preparations have been picked up by niethylin- 

 blue. 



Fig. 9. Vertical section of skin of D. scandens. 



Fig. 10. Transverse section of the egg-sac of J), somamrpatana. 



Fig. 10 a. A teased preparation of the spherical testicular vesicle of 

 D. somavarpatana. 



Fig, 10 h. Transverse section of the tubular testicular sac of Z). somuvav' 

 patana. 



Plate XVIII. 



Fig. 10 c. Vertical section of the double testicular sac of B. scandens, 

 showing their attachment to the septum 9/10. 



Fig. \0d. A sectional preparation of the ampulla of D. elegans. 



Fig. 10 e. An entire ampulla of D. scandens, cleared and stained 

 (hfematoxylin). 



Fig. 10/. Transverse (a portion) section of the ectal end of the atrial 

 pouch of D. somavarpatana. 



Fig. 10 g. Section across the ental end of the same. 



Figs. 10 h, 10 i. Section (a portion) across the atrial pouches of an adult 

 and a young D. paradoxa ; in the latter the ridge appears 

 as a tube, the canal of which is obliterated in the former. 



Fig. lOj. A portion of the transverse section of the prostate of 

 Z>. soinaoarpatana at the ectal end. 



Lettering. 



amp., ampulla ; amp.c, ampullifcnm mucous cells ; a.s., albumin 

 space; at., arterial twig; i.i., basement-tissue ; b.v., blood-vessel; e.c, 

 coslomo- and hremocytes ; c.c.', central cell ; c.e/>. and c.mes., coelomic 

 epithelium; e.g., cutaneous gland; cm., circular muscle-fibres; cm.', 

 membranous caji^ule ; cp. and cid., cuticular layer ; ch.oD., ovarian 

 chamber; cA.,chitinou3 layer ; cA.', chromatiou fibres ; co;7.;j. , copulatory 

 pouch ; cor., cortical layer ; d., dendrites ; d.p., dorsal pore ; d.v., dorsal 

 \essel; e.s., egg-sac ; e»i., epithelial membrane ; en.r/., enteric appendage; 

 ep.c, epithelial Cflls ; /., funnel ; /.', fibrillae ; f.c, filiftn-m cells (associated 

 with the sense of movement); /.«., female opening; /.<., funnel-tube ; 

 g.mus., genital muscle ; giz., gizzard; ^/., giant fibres ; gl.c, club-shaped 

 cells; gl.ep., glandular epithelium; gr. and »?•.?»., gramdes and granular 

 matrix; t.c, undifferentiated cells ; m., intestinal wall; «»./., inner looped 

 lobe; A.S., hay aline space ; l.m., lining membrane of seta-follicle; l.t.L, 

 longer twisted lobe ; m. and m.f., muscles ; 7n.c., marginal cell ; mg.f., 

 marginal nerve-fibres ; m.i., muscles of the intestine ; ml., layer of mega- 

 cytes (trophocytes) ; m.m., metamorphosing muscles arranged like the ribs 

 of a i'an; m.o., male opening; ?»./., muscular tube; )»^.c., motor cells; 

 m.xv., mesenterial wall; «., nuclei of syncytial cells; n.c., nucleolus; 

 n.p., nucleoplasm ; ol., incipient trophocytes ; op.c.g., opening of cuta- 

 neous gland ; otl., outer looped lobe ; ov., ova and ovai'y ; ovd., oviduct ; 

 out.ep., outer epithelial cells; ;>., perceptory processes; ^j.c, sensory 

 processes of tactile cells ; p.c.', proliferating peritoneal cells ; p.c", paired 



