ScHAEFF — On the Slugs of Ireland. 535 



spirit. The various parts of tlie reproductive organs differ from those in A. carinata, 

 chiefly in being much shorter. The sperm-duct (sp.), the " Patronenstrecke " (jyat), 

 and the receptaculum (rec.) are all shorter, in comparison with the same organs in 

 the preceding species. The receptaculum seminis (rec.) exhibits, perhaps, the most 

 striking difference, being more rounded, with a short stalk. There is generally 

 one accessory gland (ac.) opening into the vestibule, but sometimes there are more. 

 I have noticed in a brown specimen as many as four, whilst in another from the 

 same locality there was only one. 



Reproduction. — The smallest specimens I have seen measured about 20 mm., 

 and did not differ very materially in colour from the adults. A specimen kept in 

 captivity deposited eight eggs at the end of August. They were very delicate 

 and thin-shelled, adhering together by a glutinous mucus. They were slightly 

 oval in shape, and measured only 2 mm. long by 1| mm. broad. It is surprising 

 that there should be such a very great discrepancy between the size of the eggs in 

 the two species of Amalia. 



Habitat. — This species is one of the rarest of slugs ; and I never found it but 

 in the open country, and only at all abundant in one spot, at Raheny, near Dublin, 

 in a field under heaps of decayed weeds. In the same place I obtained an 

 occasional specimen of the drab-coloured variety among the others. Later on I 

 found a few specimens at Kilruddery and Whitechurch, both near Dublin. I 

 received two specimens from Miss "Warren, who found them in her garden at 

 Ballina, in Sligo ; and a dark one from the Aran Islands, along with a number of 

 A. carinata. Clarke (3), who first discovered this species in Ireland, states that in 

 the Queen's County, at La Bergerie, the brown variety is much commoner than 

 the black. He has taken the slug also in the counties of Galway and Mayo, it 

 being very abundant in the latter.* 



Food. — Gain (10) states that this species took 83 per cent, of the different 

 kinds of food which were offered. I have not myself observed what it lived on, 

 but it seems probable that its chief natural diet consists in decaying plants. 



General Distribution. — Great Britain, France, Italy, Spain, Portugal, Sicily, 

 Sardinia, the Balearic Isles, Egypt, Algiers, Morocco, the Azores, Madeira, 

 St. Helena, Ascension, South Africa (?), California (?), Bermuda, and, probably 

 introduced, in Brazil. 



Genus IV. — Arion (F^russac, 1819). 



Body, nearly cylindrical, strongly wrinkled. Mantle, shagreened or granulate. 

 There is a caudal gland. Internal shell, not solid, but composed of a soft mass of 

 granules. Pulmonary opening in front of middle of mantle, and genital pore 



* I have since taken, it at Queenstown, county-Cork. 



