588 



Transactions of the Society. 



12. Henlea curiosa Friend. 



Length 20 mm., segments 55-60. Dull grey or yellowish 

 colour, somewhat dirty looking under the Microscope, but fairly 

 transparent. Setie, 4 ventral, 3 dorsal in front, 3 and 2 behind. 

 Inner pair as long as outer, or slightly longer, very slightly bent 

 internally. Never exceed four in number. Salivaries very large, 

 sac-like, unbranched, resembling those of Endiytrseus alhidus 

 Henle. Spermatheca3 with bulbous swelling near the opening, and 



Jnt. 



-/z 



Jimp. 



Fore^xs 



Fig. 110. — Spermatheca of 

 Henlea curiosa Friend. 



Pore 



Fig. 111. — Nephridium of 

 Henlea citriosa Friend. 



somewhat shorter duct connecting it with intestine (fig. 110). Nerve 

 chord enlarged in front. Brain about as long as broad, straight or 

 slightly concave before and behind, but varying with tension. In 

 one example the three pairs of septals lay one segment farther 

 back than the normal. No cesophageals. Four pairs of nephridia 

 in front of girdle in 6/7-9/10 ; anteseptal small, postseptal large, 

 with duct forming an extension of the postseptal (fig. 111). Intestine 

 suddenly widening in segment 8 ; dorsal vessel beginning in or 

 near segment 12. Several of the characters show it to be as much 

 an Encliytra'us as a Henlea. 



British Record. — Hastings, December 21, 1911. 'i 



13. Henlea fragilis Friend. 



A very tender worm which soon breaks up under examination. 

 Transparent, with a tinge of yellow or dirty brown. Length about 

 12-15 mm., segments 40-45. Sette vary in number between 2 and 

 8, often 3-5 behind and 4-6 in front, sometimes more or fewer, not 

 always Fride7'icia-like, but frequently so. Coelomic corpuscles 

 large, brown, oval, sharply defined as in typical species. Brain 

 about 1^ or 2 by 1, convex behind, or sometimes indented as usual. 

 Nephridia with long duct arising near the septum. Normal pair 

 of salivaries in the usual position, short ; and a single gland or a 

 pair extending from segment 5 to 7 of a quite abnormal character. 

 The duct of the spermathecse about equal in length to the ampulla 



