158 Proceedings of the Royal Irish Academy. 



Enchytrseus globulata Bretscher. 



1900. U. g., Bretscher in Ptev. Suisse ZooL, vol. viii., p. 450. 



Specimens from the summit of Lough Salt Mountain in Co. Donegal 

 agree with Bretscher's description (tom. cit.) in the number of setee, nephridia, 

 corpuscles, reproductive organs, and absence of salivary glands. Thej also 

 possess the peculiar pair of clear shining glands attached to the oesophagus 

 in the 5th segment (Bretscher gives the 4th segment). These latter organs are 

 probably of the nature of salivary glands. The differences from Bretscher's 

 species are slight, and not of specific importance. Tbe length is 2-4 mm. 

 The brain is wider behind than in front, and the dorsal vessel rises about 

 the 10 th segment. These worms are very tenacious of life. They lived for 

 a year in a small glass vessel containing a little of the peaty soil in which 

 they were found, together with AcJiceta hohemica smd Marionina spJiagnetorum. 



Habitat — Ireland. Summit of Lough Salt Mt. (1500 feet), Co. Donegal. 



Distribution — Switzerland. 



Enchytrseus lobatus n. sp. 



Plate XI., fig. 14, a-g. 



These worms were found in moss and sea-weed over which water trickled, 

 on the cliffs at Howth. The place is probably covered with salt-water at 

 certain times. They were accompanied by a curious mixture of fresh-water 

 and marine animals, including Nads elinguis, Macrostoma Tiystrix, Monotus 

 alius, Lumhricillus Evansi, &c. The worms are 4 mm. long. To the naked 

 eye they appear to be filled with bright white spots, like E. argeyiteus, though 

 without the silvery lustre of the latter species. This appearance is caused by 

 the coelomic corpuscles, wbich, under the microscope, appear as dark bodies. 

 These are very large, nucleated and coarsely granular (PL xi., fig. 14, A'l, 

 of an irregular flat, oval shape. The amount of dark pigment in the 

 corpuscles is very variable, and some of them are quite transparent and 

 colourless. There are two large set« of the usual shape in each bundle. 

 The head-pore is situated between the prostomium and first segment. There 

 are no dorsal pores. The clitellum occupies segments 12 and ^ lo. It is 

 composed of large, roughly rectangular granular cells in rows, with clear 

 spaces between them. The cuticle bears scattered irregular glands. The brain 

 (fig. 14, b) is concave before and behind. It is nearly twice as broad behind 

 as in front ; and the length greatly exceeds the breadth. There is a large 

 copulatory gland in the 15th segment (fig. 14, c). Salivary glands are quite 

 absent. The nephridia (fig. 14, d) have a large, almost square anteseptal. The 

 flame is placed obliquely as in the genus Achaita. Tbe postseptal is of the 



