SOME ANNELIDS QF THE THAMES VALLEY. 101 



were received by Dr. Benliam from Mr. W. H. Shrubsole, of Sheerness, in 

 the spring of 1891. Since then I have repeatedly studied it from difeerent 

 localitiesletween the Nore and the Tower Bridge. I take this opportunity 

 of expressing my great indebtedness to Mr. Chas. S. Todd, of Tottenham, for 

 vahiable consignments from many localities, containing a large proportion of 

 the species recorded in this connection. 



3. Hemitubifex benedeni (^Udel<). (Recorded by Benham with the fore- 

 going as H. ater?) 



Found in dark, evil-smelling, decaying organic detritus at Sheerness, and 

 thence to the City. Received from Mr. Topps-King, of Chatham, quite 

 recently. 



4. Spirospeema feeox, E'uen. 



Benham says (2, p. 207): " I have found specimens in the Thames and in 



the Cherwell." 



5. Clitellio arenaeius (0. F. Mull.) Sav. 

 Benham (2, p. 187), from Sheerness. 



6. Beanchiuea soweebyi, Beddard. 



Regent's Park and Kew Gardens : still abimdant, with other interestmg 

 aquatic annelids, some of which will be named below. For a recent study of 

 this worm reference may be made to the paper of Dr. J. Stephenson, 

 presented to the Royal Society of Edinburgh, December 4, 1911. 



We come now to more recent studies, which not only confirm the foregoing 

 records, but greatly extend our knowledge of the Thames Valley Tubificidse. 



7. Monopylephoeus parvus, Dltlevsen (1904 : Zeit. wissen. Zool. Bd. 77, 

 pp. 426-8, figs. 25 & 26). 



As there can be no doubt about the identity, I transcribe my own notes. 

 " Thames at Kew. Lily pond in Kew Gardens : collected August 2^, 1911.. 

 Tower Bridge : collected by Mr. C. Todd, Sept. and Dec, 1911. A tiny 

 worm 6-10 mm. in length ; very slender : segments 65. Straw-coloured or 

 yellow-brown. Head somewhat pointed when in motion, front segments with 

 narrower and wider annulus. Chloragogen cells begin in segment 5. Setse 

 usually three in front, four in a few instances, declining to two and one 

 posteriorly. Nephridia with small anteseptal without covering cells ; post- 

 septal very large. Dorsal vessel with heart-like enlargements, ranging in 

 some instances from the fifth to the ninth segment. Brain with a lobe at each 

 of the posterior corners and strong anterior processes. Sperm-funnel about 

 twice as long as broad ; ducts with peritoneal cells. Two sets of ^ three setai 

 onlv on segment 11, with an unpaired male pore between. This refers it 

 to 'Monopylephoriis. The setffi here do not differ from those of the other 



