578 Transactions of the Society. 



had previously been entered under such generic titles as Enchy- 

 trssus, Archienchytneus, and Neoenchytrmus, were separated from 

 those genera, and placed in the new genus, and the first list con- 

 tained four well-known and four doubtful species. The four 

 recognized species had previously been known as Enchytriev.s 

 futeanus Vejd., Arehienchyfr^us dicksonii Eisen, A. nasutus Eisen, 

 and a species with many aliases, which may be recognized as 

 EnchytriBus ventriculosus Udek. 



If we turn to Beddard's invaluable Monograph {3) we shall 

 find that the author, in 1895, recognized four species only, and 

 enters them as Henlea ventriculosa, E. Icptoclera {= H. nasuta), 

 H. dicksonii and H. puteana. It is to be observed that though 

 these species were known to be European, in 1895 not one is men- 

 tioned as having been found in Great Britain. I was the first to 

 draw attention to the fact that the genus was represented in these 

 . islands, by articles in The Naturalist {9), The Essex Naturalist {10), 

 and elsewhere, as long ago as 1896. 



In 1899 Bretscher (4) published an account of a new species 

 {R. rosai) in the Eevue Suisse de Zoologie, vi. p. 412, and the 

 following year Michaelsen (Ji) reviewed the position and enumerated 

 the five species already named, while he added descriptions of four 

 other Annelids diagnosed by Eisen in 1878, but regarded as doubt- 

 ful. Eisen had named them Archienchytneus genimatus, A. lampas, 

 A. tenellus, and A. ochraceus, but little if anything further has ever 

 been discovered respecting them. It is true the descriptions were not 

 so full and accurate as they would be if written to-day, but Eisen 

 is a first-rate authority, and already two of his species had been 

 admitted as reliable. I have the impression that in due course all 

 his species will fit into their proper places. But it is since the 

 publication of Das Tierreich in 1900 that the greatest progress has 

 been made. Bretscher (4) and Southern (6) have added their 

 quota, and my own researches during the past year have been 

 amply rewarded. In 1909 Southern's List of British Henleas 

 numbered four species, which are as follows : — H. dicksonii Eisen, 

 H. nasuta Eisen, H. ventriculosa Udek., and a new species which 

 had been described in 1907 as H. hibernica Southern {5). In 1911 

 I discovered H. rosai Bret, in this country ; recorded H. lampas 

 Eisen as a probable native (7), and described {8) a new species of 

 a very Lilliputian character as H. perpusilla. On December 21 

 last, after reading my paper before this Society on British Tubi- 

 ficidse, I had an opportunity to spend a few hours in Hastings, 

 when I had the joy of finding several species new to science. It 

 is to these in particular that the present study will be devoted. 

 It seems probable that the most suitable localities for Heyleas are 

 along our coasts, but I have recently found two species new to 

 science in Nottinghamshire, as well as a species which had been 

 already described by Bretscher, but not previously known as British. 



