British Enchytr&ids. By Rev. H. Friend. 137 



glands. Septals three pairs, small (in front), medium, and large. 

 No oesophageal glands. Girdle 12 to half 13. Ccelomic corpuscles 

 large, clear, oval to round. Setae about six in front, shortest in 

 the middle of each bundle, as in Fridericia, 4-5 behind, larger and 

 nearly equal. (Esophagus merges suddenly into intestine in 7/8, 

 dorsal vessel arises in 10/11. Four pairs of large nephridia in pre- 

 clitellar segments (6/7-9/10). Duct of nephridia equalling post- 

 septal in length, and usually arising from the middle portion. 

 Sperm-duct in girdle segment very fine, coiled. 



Related to H. dicksoni, but much smaller, and possessed of 

 specific characters, such as origin of dorsal vessel, shape of sperma- 

 thecae, and size of brain. 



Habitat. — Stream at Netherseal, near Ashby-de-la-Zouch, 1911. 

 First described as a new species in Zoologist, March 1913, p 84. 



7. Henlea multispinosa Friend. 



Length 23 mm., fairly stout. Segments 40-50, transparent. 

 Spermathecae consisting of narrow ducts, sometimes varying in 

 diameter, with small glands (apparently 2 to 4) at the 4/5 opening. 

 Salivary glands present, slender, forked or branched (resembling 

 those of certain species of Fridericia) ; three pairs of septals, 

 normal in shape, size and position. First nephridia in 4/5 large ; 

 duct emerging from behind the septum, and exceeding post- 

 septal in length. Bulb in 7, dorsal vessel arising in 8th segment. 

 Setae very numerous ; 4-6 in posterior region, 8 in the middle, 

 rising to 10-12 in front. Very few known Enchytrseids ever 

 exceed 10 setae per set. H dicksoni, which the new species re- 

 sembles, may possess 8 setae, and H. puteana may have 8-10. 



Habitat. — Under moss, overflow from Canal, Nottingham City, 

 December 16, 1912. Formerly regarded as a variety (multi- 

 spinus) of H. dicksoni. See Trans. Notts Nat. Soc, 1911-12, p 55. 

 Described for the first time as a distinct species in Zoologist, 

 March 1913, p. 83. 



8. Henlea quadrupla Friend. 



Length 10-12 mm. Segments 45-50. Four pairs of septal 

 glands, whence the specific name. One pair of oesophageal glands 

 in segment 8, with dorsal vessel in 8/9. Large sac-like salivaries 

 in front of first pair of septals. Setae somewhat variable, 3-4 dor- 

 sally, 4-5 ventrally, but sometimes as few as two per set. Ccelomic 

 corpuscles not of the horny type. Brain not much longer than 

 broad ; not rigidly outlined, but varying with tension. Postseptal 

 about three times as large as anterior portion of nephridium ; duct 

 arising near posterior end, or as a continuation thereof, short. 



