268 Transactions of the Society, 



the end or near the posterior of postseptal. Eesembles F. udei in 

 certain particulars, but is distinct therefrom. 



Found between Swadlincote and Overseal on the borders of 

 Derbyshire, in the summer of 1911, and now recorded for the first 

 time. 



6. Fridericia lobifera Vej. var. minor Friend. 



A number of specimens which I collected at Mansfield in May 

 1912 seemed at first referable to the species lobifera. They 

 presented, however, numerous peculiarities, and did not always 

 appear true to their character. The following details set forth the 

 more important points : — 



Length of living worm always 8-10 mm., segments 40 to 45. 

 Slender and white. Setae always 2 behind, long ; in front 4, smaller, 

 and with the inner pair shorter than the outer. Occasionally 5 or 

 6 ventrally. Dorsal vessel usually arising in 16/17, sometimes in 

 18/19. Girdle with cells like those of F. hulhosa. Long sperm- 

 duct, with large pores at opening, and glands. The ampulla 

 3 times longer than broad, possessing a considerable collar. Sperma- 

 thecae with large ampulla, half-a-dozen or more sessile diverticula 

 and duct without 4/5 glands. Large salivaries extending to the 

 diverticula of the spermathecse, convoluted, usually unbranched. 

 Brain convex behind, of the usual Fridericia type, varying with 

 tension. Nephridia normally in 6/7-9/10, 4 pairs in front of 

 girdle, duct as long as postseptal, not arising from posterior end. 

 3 pairs of septal glands. 



One specimen showed 4 diverticula with short stalks instead 

 of numerous sessiles. The salivaries in this case w^ere much 

 branched, recalling the type. The differences do not seem to be of 

 such a character as to justify the creation of a new species. 



Found in sandy soil with F. michaelseni, F. ohtusa, and others. 

 The Fridericias are so numerous that only an expert can obtain 

 sufficient knowledge of their characters to determine the species 

 willi certainty. 



VII. — New Species of Henlea. 



Certain additions must already be made to my list of British 

 Henleas contributed recently to this Journal (7). 



1. Henlea minuta sp. n. 



Length 5-6 mm., small, slender, and transparent. Segments 

 number 35. Setse equal in length, not resembling those of 

 Fridericia, but recalling those of Buchliolzia fallax, sigmoid ; 3-4 

 in lateral anterior and 4-5 in ventral anterior bundles ; 4-6 pos- 

 teriorly, the largest number being in the middle region of the body 



