252 Mr. W. E. Collinge on the Anatomy ce. 
5. Goodia (Orth.) monochromum, Karsch. 
Goodia (Orth.) monochromum, Karsch, /. c. p. 502, pl. xx. fig. 3. 
6. Goodia (Orth.) prox, Karsch. 
Goodia (Orth.) prox, Karsch, /. ¢. p. 502, footnote. 
My reference of the genus to the Drepanulide is, I discover 
upon a more minute examination of the neuration, erroneous. 
Dr. Karsch is right in referring it to the Saturniide. 
Western University of Pennsylvania, 
August 16, 1893. 
XLI.—Description of the Anatomy hc. of a new Species and 
Variety of Arion. By Water E. CoLuince, Demon- 
strator of Biology, Mason College, Birmingham. 
[Plate LX.] 
Arion flagellus, sp.n. (Pl. TX.) 
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 Arionine ; 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., 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 
