[87 ] 

 THK IRISH I,AND AND FRESHWATER MOI<I.USCA. 



BY R. P. SCHARFF, PH.D., B.SC. 

 ( Contimted from page 67. ) 



GASTROPODA. 

 P U L M N A T A , 



Gejnus— ARION". 



Arion ater, ly. 



I. II. III. IV. V. VI. VII. VIII. IX. X. XI. XII. 



This, the most, variable of our slugs, occurs everywhere in Ireland. 

 Fore;ign Distribution. — The greater part of Europe. 



Arion subfuscus, Drap. 

 I. II. — IV. V. — VII. VIII. IX. X. XI. XII. 



As I have already pointed out (13), there are two very distinct varieties 

 in Ireland, the one chiefly occurs in hilly districts, and the other in the 

 plain. Thompson (15) mistook this form for a variety of A. ater, to 

 which it certainly bears a strong resemblance. 



Mr. Campbell and Mr. J. N. Milne have recently discovered this species 

 near Londonderry. 



Foreign Distribution. — Great Britain and Continental Europe, ex- 

 cept Spain and Portugal. 



Arion hortensis, Fer. 

 I. II. — IV. V. — VII. VIII. IX. -- XI. XII. 



This species was not known to Thompson from the North of Ireland, 

 but Mr. Praeger and myself recently found a specimen at Cultra, Co. 

 Down. Near Dublin it is common enough in two distinct varieties, 

 and I have also taken it on the Aran Islands. Miss Warren has sent me 

 specimens from Co. Sligo, and Messrs. Taylor and Roebuck (14) record it 

 from Co. Waterford. 



Foreign Distribution. — Great Britain, western and central Ger- 

 many, France, and Italy. 



Arion circumscriptus, Johnst. 

 I. II. — IV. V. — VII. VIII. IX. — XI. XII. 



Mr. Collinge has pointed out to me that A. circumscriptus, a name pro- 

 posed by Dr. Johnston [Edin. New Philos. Journal, 1828), should be 

 substituted for A. bourguignati, the more recent name of Mabille. This is 

 a much rarer slug than the last, and it has often been mistaken for it, 

 but the white foot is a characteristic. Miss Warren obtained it in Sligo, 

 and Mr. J. N. Milne near Londonderry. 



Foreign Distribution. — Great Britain, Germany, Switzerland, 

 northern Italy, France, and Norway. 



Arion intermedins, Normand. 



L — — IV. V. — — VIII. IX. — XI. XII. 



I have taken this species abundantly at Raheny, near Dublin, but it is 

 apparently rare in other counties, where I never met with more than an 



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