252 Mr. W. E. Collinge on the Anatomy dec. 



5. Goodia {Orth.) monochromuvi^ Karsch. 

 Goodia {Orth.) monochromum, Karsch, I. c. p. 502, pi. xx. fig. 3. 



6. Goodia {Orth.) pr ox, Karsch. 

 Goodia (Orth.) prox, Karsch, I. c. p. 502, footnote. 



My reference of the genus to the Drepanulldas is, I discover 

 upon a more minute examination of the neuration, erroneous. 

 Dr. Karsch is right in referring it to the Saturniidae. 



Western Universitv of Pennsylvania, 

 August 16, 1893. 



XLII. — Description of the Anatomy &c. of a new Speciea and 

 Variety of Arion. Bj WALTER E. COLLINGE, Demon- 

 strator of Biology, Mason College, Birmingham. 



[Plate IX.] 



Arion flagellus, sp. n. (PI. IX.) 



For some months past I have been receiving large series of 

 Irish slugs, mostly belonging to the genus Arion, from 

 Mr. R. A. Phillips, of Ashburton, Co. Cork. 



In June last I received two boxes of Arions, three examples 

 of which I noticed in particular owing to the small size of the 

 caudal gland. Through the kindness of Dr. ScharfF, 

 Mr. Phillips, and Miss Delap I have had opportunities for 

 examining many hundreds of Irish Arionin^e ; but nothing 

 approaching this form has previously come under my notice. 

 On July 26th I received a further series of slugs from 

 Mr. Phillips, collected at Schull, Co. Cork, two of which I 

 recognized as agreeing with the form previously noted. 



A careful examination satisfies me that it is a new form, which 

 I now describe and figure. 



The slug alive measured 50 millim. in length, in alcohol 

 42 millim. J with a mantle 13 millim. long. The head is of a 

 bluish-white colour, which gradually darkens or becomes a 

 greyish blue on the tentacles. In the median line of the body 

 a broad, dark, vandyke-brown coloured band extends from 

 the caudal gland to the mantle and becomes less distinct 

 after passing over about half the length of the mantle. On 



