A KEY TO BRITISH HENLEAS. 85 



annelids, autumn, 1911 ; but hitherto regarded as a minor 

 variety of one of the larger species. 



4. Henlba multispinosa, sp. nov. 



Formerly looked upon as a mere variety of H. dicksoni, which 

 it somewhat closely resembles at first sight. A fairly stout 

 worm, about 12 mm. in length, transparent, of 40 to 45 segments. 

 Setse from 4-6 behind, to 8 in the middle, and as many as 

 10-12 in front. Salivary glands present, resembling those of 

 F. bulbosa, Eosa ; slender and slightly forked at the tip. No 

 oesophageal or nephridia-like glands. Spermathecae composed 

 of a duct which varies somewhat in size but has no distinct bulb 

 or ampulla. Small glands sometimes occur at the 4-5 opening. 

 Brain of the typical shape and size, slightly incised behind. 

 Very prominent girdle when fully adult, with large pores. 

 Nephridia with medium-sized anteseptal and large post, from 

 about the middle of which a long duct emerges. Found nephridia 

 as far forward as 4-5. (Esophagus enters bulbous intestine in 

 segment 7, the dorsal vessel arising in the middle of the eighth. 

 The normal septal glands (three pairs) present. Ccelomic cor- 

 puscles oval and granular, not brown or horny. 



Found under moss by the canal at Nottingham, December 

 16th, 1912, and reported as a multispinose variety of H. 

 dicksoni. 



5. Henlea quadrupla, sp. nov. 



Separated from H. tenella, with which I formerly associated 

 it. H. tenella has never been satisfactorily worked out ; but the 

 species which I regard as approaching it most nearly is now 

 found to be quite distinct from this, which is readily distin- 

 guished by the septal glands being quadrupled. 



Length 6-10 mm. Segments up to 50 in number. Setas 

 2-4 behind, 3-4 or 5 in front. One pair oesophageal glands in 

 segment 8, large salivary glands filling up much of the ccelom 

 in front of the first pair of septal glands. Nephridia with 

 posterior ending in a narrowed duct. This form of nephridium 

 is at present only recorded for one other species in this group; 

 but in Henleanella at least four species (H. marina, H. curiosa, 

 H. parva, and H. rosai) present it. Spermathecae with short 

 duct, large ampulla and glands. Brain of normal type. Dorsal 



