L.M.B.C. TURBELLARIA. 77 



27. Stylo stomum variahile, Lang (PL XIV, figs. 48, 40.) 

 Length 5 — 8 mm. Body oval, romided posteriorly, nar- 

 rowed anteriorly. The angles of the truncated front- 

 margin are shghtly produced into rudimentary tentacles. 

 The body is usually colourless, and is more or less trans- 

 parent according as the genital organs are less or more 

 developed. Immature examples display the branches of 

 the brightly-coloured intestine very clearly. The mouth 

 combined with the male genital pore, is just behind the 

 brain. The muscular pharynx gives rise to the white 

 anterior area seen upon the dorsal surface. Small groups 

 of eyes are present over the brain, and at the base of the 

 tentacles. In front of the sucker lies the female pore, sur- 

 rounded by the massive "shell-gland." The uterus is 

 placed at the sides of the main-gut. 



This species was dredged on shelly ground, outside 

 Port Erin Harbour. It also is found at Plymouth, and 

 has been recorded by Dalyell from the Firth of Forth. 



In concluding this Eeport I wish to express my 

 hearty thanks to Prof. Herdman for the use of the 

 L.M.B.C. Station, at Port Erin, and to my friend Mr. W. 

 J. Beaumont, for his ever ready assistance in the capture 

 of these Turbellaria. 



Explanation of Plates, XII — XIV. 

 List of Abbreviations : — 



AU eyes, BE brain, CH copulatory organ, D intestine, 

 DP dorsal papillae, EJ ejaculatory duct G and PE 

 penis, GA genital atrium, GD poison glands, GEE 

 germaria, GO genital aperture, KC chitinous granule-duct, 



