I RIEND : NEW AND LITTLE-KNOWN OLIGOCHJETS. 14 



a fixed period' (loc. cit). Omitting the anomalous sEo/osoma we 

 have the following seven families under the Limicolse or Microdrili : — 

 (1) Phreoryctidae, (2) Moniligastridoe, (3) Lumbriculidae, (4) Eclipi- 



drilidse, (5) Tubificidae, (6) Naidomorpha, (7) EnchytneicUe. The 

 reasons for the arrangement will be found in Beddard. 



In 1865 there was printed, by order of the Trustees, A Catalogue 

 of the Non-Parasitic Worms in the Collection of the British Museum, 

 compiled by Dr. George Johnston, in which we have what may be 

 regarded as the first attempt to deal systematically with the 

 indigenous Helmintha. He divides them into two groups : — 

 (1) The Apodous, including the leeches, planarian worms, and 

 other achcetous or bristleless worms, and (2) the Polypodous. This 

 second group was made up of the Orders Scoloces and Annelides. 

 The Annelides were the equivalents of our modern Polychaeta, while 

 the Scoloces corresponded with the Oligochseta. The following 

 summary of that Order may be helpful. 



Order SCOLOCES 



Tribe L—LUBfBRICIXA. Tribe IL— NAIDINA. 



I amily I. — Lumbricid e. Family III. — Naides. 



G 



1. Lumbricus. 11 species ( 6. Proto. 1 species. 



recorded. 7. Stylaria. 1 species. 



j 2. Enchytrrcus. 1 species. Genera -j 8. Serpentina. I specie> 



I 3. Scenuris. 4 species. I . 9. Nai's. 2 species. 



Family IL-LiTTORKLEs. ' Ia Ch^togaster. I species 



Genera { + CHteliic, 1 specie 



( 5. valla. 1 species. 



The entire number of species, therefore, was: — Terrestrial, 11 ; 



limicolous, 13 ; a total of 24. 



Johnston 



day is carefully recorded by Beddard, and it now remains for us 

 to carry on the work, till our Limicolse are as well known as are the 

 Terricolje. 



I. Stylodrilus vejdovskyi Benham. Turning to Beddard's 

 third family (Lumbriculidae) we find (p. 221) an account of the 

 genus Stylodrilus, under which are ranged three species. The genu 

 was founded by Claparede, and has been further elucidated by 

 Vejdovsky, Benham and Ratzel. The following is Beddard's generic 

 definition : 'Setie bifid j clitellum x-xii. ; spermathecae, a pair in ix. ; 

 a pair of non-retractile penes present on segment x., perforated by 

 sperm-ducts : spermiducal gland pear-shaped with long duct.' The 

 first species {St. heringianus Clap.) was described by Claparede in 

 '862. Twenty-one years later, in 1883, Vejdovsky described 

 a second species {St. gabretie). Finally, in 1S91, Benham found 

 a third species in this country to which he gave the name which 



May 1896. 



