1907. Southern. — Oligochceta of Lambay. 71 



The spermatheca (PI. 18., fig. iC), consists of a pear-shaped ampulla, 

 gradually narrowing till it enters the oesophagus. The duct is sharply 

 defined, and is equal in length to the rest of the spermatheca. It fre- 

 quently has several small glands at the external opening. 



This species is very closely related to Henlea nasuta (Bisen). It differs 

 from the latter in the number of setae, in the shape of the nephridium and 

 sperm funnel, but chiefly in the position of the two oesophageal glands, 

 and the origin of the dorsal vessel, which has three contractile hearts 

 and not two, as Vejdovsky states for Henlea nasuta (1., page 56). 

 Henlea nasuta has not yet been found in Ireland. I have found Henlea 

 hibemica in various places, including Co. Kerry, and the Boyne valley, 

 Co. Meath, and all these specimens agree closely in their characters with 

 each other. 



Marion ina semifusca (Clap.)* 



1900. Michaelsen, "Tierreich," vol. x., p. 76. 



Worms belonging to this species were found under stones between tide 

 marks near the harbour. The species was described by Claparede 

 (1., p. 76), from specimens collected in the Hebrides. It does not seem 

 to have been recorded since. 



Mesenchytreeus setosus, Mchlsn.x 



1900. Michaelsen, "Tierreich, 1 vol. x., p. 85. 



1901. Mesenchytreeus megacheetus, Bretscher, Revue Suisse Zool., vol. ix., 



p. 210. 



1904. M. setosus, Bretscher, Rtv. Suisse Zool., vol. xii., p. 263. 



Two specimens of this species were obtained in soil, in November. It 

 appears to be mature in the winter, as immature forms were found in 

 Co. Kerry in June. They agree very well with Michaelsen's description 

 (2, p. 494), except that the brain may be straight, convex, or slightly 

 emarginate behind. The dorsal vessel rises in the 16th segment, and is 

 covered with greenish brown glands. The nephridium (PI. 19., fig. 6), has 

 a very long and narrow anteseptal ; the post-septal consists of two large 

 lobes. The sperm funnel is small, about twice as long as broad, and the 

 duct is very short. 



Distribution. — Germany. Switzerland. 



Enchytreeus albidus, Heule. 



1900. Michaelsen, "Tierreich/' vol. x., p. 89. 



1906. Southern, Irish Naturalist, vol. xv., p. 184. 



This species was found in June with Friderieia bulbosa, in soil which had 

 collected in a depression of the rocks, near Saltpan Bay. They were 

 also found mature in November. 



Distribution. -Ireland, England, common in Europe, New Zealand, 

 Kerguelen Islaud, &c. 



