Habits of Testace'llus Sciitidum. 43 



coloured confervae, but more especially a detached portion 

 of the Chondria articulata, as to be easily overlooked. It 

 appears to me interesting, in so far as its transparency allows 

 us to examine its circulating system with an accuracy which 

 perhaps no dissection could enable us to amend. Close to 

 the tubercle we see the vessel (for there is no heart) divide 

 into two equal branches, one to each mandible ; and the flux 

 and reflux of a fluid is easily observable in them. From the 

 tubercle the vessel runs down the body, giving off a single 

 branch, equal in size to the trunk, to each leg ; and this 

 branch continues uninterrupted to the tarsus. Neither in the 

 trunk nor branches could I perceive any movement of the 

 fluid. 



Berwick upon Tweed, July 16. 1832. 



Art. VIII. A short Notice of the Habits of Testacellus Scutulum. 

 By Mr. Thomas Blair, of Stamford Hill, near London. 



Sir, 



I herewith send you specimens of a species of slug, the 

 individuals of which I have watched for the last four years 

 with considerable interest. They are generally to be found 

 near the green-house; I believe I have seldom seen one more 

 than fifty yards from it. It is of a dirty yellow colour, and 

 when crawling on the surface of the ground is about 3 in. in 

 length, and is furnished with a small rudimentary shell at the 

 tail end. 



In winter it buries itself from 1 to 2 ft. deep in the earth, and 

 appears on the surface of the ground occasionally with other 

 species ; but, from the time of my first observing it, until the 

 present, I have never seen it feeding on any species of vege- 

 table. One morning last spring, on passing a narrow bor- 

 der, which had been previously watered with lime-water for 

 the purpose of destroying slugs, I observed several of the 

 yellow species amongst others dead, and close beside or near 

 the head of several of them lay a dead worm. A man who had 

 performed the watering informed me that they had been dis- 

 gorged by the slugs. I found one considerably larger than the 

 others, in which, on cutting it open, I found a large worm. 



About the middle of last month, during fine mild weather, I 

 observed one on the surface of the ground, firmly fixed to the 

 middle of a large worm, the head of the slug being so buried 

 in it, that it appeared to be nearly cut in two ; it appears to 

 me, however, that they generally contrive to seize them by 

 one end, otherwise it would be difficult to swallow them whole 



