British Enchytrmids. By Rev. H. Friend. 589 



and its connexion with intestine. A pair of (esophageal glands in 

 segment S with widening of intestine. The origin of the dorsal 

 vessel is normal in 8/9. Three pairs of septals. 



I examined several specimens of this worm in different stages 

 of development, and find that there is considerable variation at 

 different points. The number of setse may increase with age, so 

 that while a young specimen does not possess more than 5 or 6, a 

 perfectly adult example may have 7 or 8. The ampulla of the 

 spermatheca enlarges with age, the brain tends to become concave 

 behind as the adult stage is reached, and the apparent salivaries in 

 segments 5-7 are absorbed. These are points of considerable 

 interest and importance, and show how necessary it is that per- 

 fectly adult specimens should be used in diagnosis whenever 

 possible. The most important features will be summarized when we 

 come to the tabular representation. The brain is typically Henlean, 

 and the development of the spermathecse may be best judged by 

 the three forms shown in the illustrations (fig. 112, a, h, c). 



British Record. — Hastings, December 21, 1911. 



14. HenUa heterotropa Friend. 



Leugth 12-15 mm., segments 45-50. Very transparent, 

 yellowish intestine with light brown chloragogen cells. Coelomic 

 corpuscles large, oval or round, not spindle-shaped, dissolving 

 immediately after being forced from the body, or forming disks 

 with a dark nucleus. Spermatheca without glands at opening 

 and without ampulla or diverticula ; composed simply of a short 

 and fairly stout duct. (Esophagus suddenly merges in the in- 

 testine in segment 8, behind a pair of dark oesophageal glands. 

 Here the dorsal vessel arises by intersegmental gi'oove of 7/8. 

 Brain fairly large, deeply incised behind. The nerve-chord en- 

 larged in front. Foremost nephridia with large postseptal, but the 

 origin of the duct not observed. I could not find the long slender 

 sperm-duct which is usual in the neighbourhood of the girdle, but 

 its place seemed to be taken by a short, stout organ. The dorsal 

 setse are usually fewer than the ventral, the latter numbering 5-6. 

 No salivary glands were observed. In many respects related to 

 H. nasuta, but that species has branched salivaries, attains a larger 

 size, and has the dorsal vessel in 8. S. heterotropa lias enlarged 

 vessel in segment 6, and vacuolar or glandular epidermis. 



British Record. — Hastings, December 21, 1911. 



15. Henlea marina Friend.| 



Length 10-12 mm., slender ; segments 40-45. White to naked 

 eye, but somewhat opaque and yellowish under the Microscope, 

 owing to the colour of the ccelomic corpuscles and chloragogen 

 cells. SetfB as many as 5, usually 3 behind, and 3-5 in front, 



