On Stichocotyle nepliropi» CuniiinKliHin, a panisito of the American lobster. 479 



Olsson, p., 'G7, Eiitozoa, iakttagua lios Skandiuayisku haf^fiskar, in: 

 Acta Universitatis Lundensis. Lunds Univ. Arsskrift Afdl. Math, 

 och Naturvet., V. 8, 59 pp., tab. 1, 2. 



— '6H, ibid., V. 4, ()l pp., tab. 3—6. 



— '(j9, Nova gonora parasitaiitia Copepodorum ot Platyelminthum, ibid., 



V. G, No. 7, il pp., 1 pi. 

 VoELTZKOW, A., '88, A.spidogastor conchicola, in: Arli. Zoolog.-Zootom. 

 Inst. Würzburg, V. 8, p. 249—289, tal). 15—20. 



Explanation of Figures. 



All figures are of Stichocotylc nejihropsis Cunningila.m and Avere 

 made with the aid of an Ahbk camera Uicida, except where the contrary 

 is expressly stated. 



A b b r e V i a t i o n s. 



act. Sucker. 

 cd.n.v. Ventral nerve cord. 

 cl.ßm. Flame cell. 

 cl.gn. Ganglion cell. 

 com.su^oe. Supra-oesophageal com- 

 missure. 

 cpl. Capillary. 

 cys. Cyst. 

 gl. vt. Vitellary gland. 

 in. Intestine, 

 n/. Nucleus. 



oa. Ovary. 



or. Mouth. 



ov'dt. Oviduct. 



phyx. Pharynx. 



po. exc. Excretory pore. 



pr'' phyx. Prepharynx. 



prt. phyx. Protractor of prepharynx. 



ret. phyx. Retractor „ „ 



tb. clg. Collecting tubule. 



te. Testis. 



vs. exc. Excretory vesicle. 



Fig. 1. 

 Stichocotyle. 



Fig. 2. 

 cyst. X 2'^- 



Fig. 3. 

 was fixed by 



Plate 29. 



Portion of intestine and rectum of a lobster infested by 

 Life size, without camera. 

 Surface view of a specimen which had escaped from a 



Ventral view of a preparation made from a specimen which 

 reagents while held fiattened under a compressor. The 

 dorsal excretory pore is shown as seen through the body. X 22. 



Fig. 4. Cress section through middle region of body. The section 

 passes through a sucker and one testis. X l'^'^- 



Fig. 5. Median sagittal section through the anterior end of a 

 specimen. X ^'^^• 



Fig. 6. Sketch of pharynx and beginning of intestine in optical 

 section, as seen from dorsal side in the living worm under a compressor. 

 Freehand. 



Fig. 7. Outline of median sagittal section to show relation of 



