106 ON SOME ANNELIDS OF THE THAMES VALLEY. 



o£ llyodnlus, all new to Britain, and two new to science. Of these, three 

 species are at present known to occur in the Thames Valley, and there 

 is every reason to believe that the number will shortly be considerably 

 increased. 



\_Nole added Mai/ 2^)th, 1912, in place of farther descriptions. 



The recent researches o£ Bretscher, Piguet, Ditlevsen, Pointner, and others 

 have resulted in so great an extension of our knowledge of the Tubificidae, 

 and at the same time have revealed so confused a condition, that it is deemed 

 advisable to withhold the descriptions of these species of Ihjodrilus and 

 Tuhifex till greater certainty prevails respecting their definition. 



The Enchytrfeidee and Lumbricidse also remain to be described.] 



Biblioc4i:ai'HV. 



(1) Lankestee, E. Kay.— Trans. Linn. Soc. vol. xxvi. 1867, p. 461 ; Quart. Jouin. Micr. 



Sc. vol. xi. 1871, p. 181 ; Ann. & Mag. N. Hist. ser. IV. vol. vii. 1871, p. 92. 



(2) Benham, W. B. — Aquatic Oligochseta. Quart, Joiu-n. Micr. 8c, vol. xxxiii. 1891^ 



pp. 187 sef/. 



(3) Oeuley, L. a. — A palfearktikus ijvben elo' terrikolalniak revisioja es elterjedese. Buda- 



pest, 1885. 



(4) Bourne, A. G.— Notes on the Naidiform Oligocheeta. Quart, Journ. Micr. Sc. 



vol. xxxii. 1891, pp. 335-356. 



(5) BousFXELD, E. C— Journ. Linn. Soc, Zool. vol, xix, 1886, pp. 264-268; vol. xx. 



pp. 91-106 ; cf. Report Brit. Association, 1885. 



(6) Beddard, F. E. — A Monograph of the Order Oligochseta, 1895. 



(7) Friend, Rev. Hilderic. — Joum. Linn. Soc, Zool. vol. xxiv. 1892, p. 292 seq., and 



numerous articles in 'The Naturalist,' 'Zoologist,' ' L'ish Naturalist,' 'Gardener's 

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(8) Michaelsen, W. — Das Tierreich, vol. x. Oligochaeta, 1900. 



(9) Southern, R. — Contributions towards a Monograph of the British''and Irish Oligu- 



chteta, Proc. Roy. Irish Acad. vol. xxvii. 1909, p. 119 seq. 



(10) Bretscher, K. — Revue Suisse de Zoologie, 1896 and following years. 



(11) Friend, Rev, H. — Journ. Roy. Micr. Soc, June 1912, pp. 265-293. 



(12) Pointner, H. — Zeit. wissen. Zool., Bd. 98, pp. 620 seq. 



