74 The Irish Naturalist. February, 



found. The salivary glands are long sacs, and not branched, as Bretscher 

 states. Length, 6 nun. The epidermis bears several rows of large green 

 glands in each segment. The ccelomic corpuscles are large, granular, 

 oval to round. The dorsal vessel rises in the 17th or 18th segment. 

 First dorsal pore in the 7th segment. The brain projects prominently in 

 front (PI. 19. fig 9 A). The spermatheca (fig. 9 B) consists of a small 

 oval ampulla, lying dorsally on the oesophagus. The duct is very long, 

 and there is a single large gland at the external aperture. 

 Distribution.— Switzerland. 



Fridericia aurita, Issel. x 



1905. Issel, Zoo/, fahrb., vol. xxii., p. 468. 



This species was found in large numbers. It is easily recognised by 

 the characteristic diverticula of the spermatheca. 



Length, 10-18 mm. Setae usually four in a bundle, sometimes not 

 more than three. The oesophagus is covered with large greenish glands. 

 The dorsal vessel rises in the 21st segment. The dorsal pores begin in 

 the 7th segment. They are surrounded by four or five pear-shaped 

 gland cells (PI. 19, fig. x A). In the anterior segments, the duct of the 

 nephridium rises from the middle of the post-septal In the posterior 

 segments it rises from the base. The spermatheca consists of a long duct 

 and a pear-shaped ampulla, bearing two ear shaped diverticula near its 

 base. The ampulla is constricted near the junction with the diverticula. 

 Occasionally small glands are found near the external opening of the 

 duct. The appearance of the spermatheca varies very much, according 

 to its degree of maturity. When filled with sperm, the diverticula ap- 

 pears more cylindrical than ear-shaped. A figure showing the ap- 

 pearance of the ampulla, after the expulsion of the sperm, is given 

 (fig. x B). 



Distribution. — Piedmont, Italy, (700-1,150 metres). 



Fridericia minuta, Bret. x 



J900. fridericia minuta, Bret., Rev. Suisse Zool., p. 33. 



1900. Fridericia auricu/ata, Bret., id., p. 34 



In 1902 Bretscher (1, p. 22) united these two forms, which he had pre- 

 viously regarded as distinct. The Lambay specimens agree very closely 

 with his description. Setse, 6-7 in a bundle. The dorsal vessel rises in 

 the i8th-2ist segment. The two anterior branches on each side are 

 given off separately. The salivary glands (PI. 19, fig. 14 A) divide into 

 several short branches at the distal end. The uephridia vary in form 

 according to their position. There are no glands at the external opening 

 of the spermatheca. The two diverticula are cylindrical, and the 

 ampulla is slightly constricted off from the diverticula at its base 

 (fig. 14 B). Length, 10-15 mm. 



Distribution. — Switzerland. 



