SCLEROSTOMA STRUTHIONIS. 265 



buccal capsule; this edge shows at the innerside a num- 

 ber of rod-like thickenings , corresponding exactly with 

 the number of cilia. Along the middle of the dorsal side, 

 nearly over the whole length of the buccal capsule, there 

 is a cleft, bounded on each side by a list, which is a 

 continuation of the inferior border of the capsule; this 

 list has a faintly crenulated border and shows small irre- 

 gular figures, produced, as I believe, by the presence of 

 small beams , which are bifurcated at their inferior end 

 and support the list. The fissure is able to be widened and 

 is covered by a vaulted , elastic piece of chitine. According 

 to the description of Mr. Schulthess ^) the buccal capsule 

 of Dochmius duodenalis Leuck. shows a similar fissure ; the 

 irregular dark figures of the list however are supposed by 

 him to be due to the presence of openings. We find two 

 pear-shaped neck-glands with a long efferent duct, quite 

 like in D. duodenalis Leuck. The wall of the intestine is 

 furnished with a black pigment and shows often in its 

 lower part singular nodular thickenings. 



The reproductive organ of the male consists of the tes- 

 tis, the seminal vesicle, separated at its superior and infe- 

 rior end by a constriction from the rest of the vas deferens , 

 and of the ejaculatory duct. The testis , beginning with 

 its blind extremity at a short distance beneath the inferior 

 part of the oesophagus, lies with numerous loop-like coils, 

 increasing in width, along the anterior part of the intes- 

 tine to about ^/g of the body-length ; here it makes a S- 

 like flexure , directed forwards , and passes into the wide , 

 thin walled seminal pouch , measuring about 2 m.m. in length. 

 The ejaculatory duct in its beginning nearly as broad 

 as the seminal vesicle, is attenuating gradually towards 

 the tail ; its muscular wall consists , like in the vagina , of 

 two layers of spirally twisted fibres. The spicules are fur- 



1) Beitriige zur Anatomie von Dochmius duodenalis Leuck., Zeitschr. f. Wis- 

 sensch. Zoölogie, Bd. XXXVII, 1882, p. 163. 



Notes from tlae Leyden JVEuseum , Vol. "Vll. 



