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HARDWICKE'S SCIENCE-GOSSIP. 



and the body has grey bands and scattered dark spots. 

 A nearly identical mutation was found among an 

 introduced colong at Newport, U.S.A., and is 

 figured by Mr. W. G. Binney, " Man. Amer. Land 

 Shells " (1885), p. 450. 



6. L. maximus, var. pallido-dorsalis, Roeb. M.S., 

 Hudson. The name was published, without any 

 description, in Science Gossip, 1885, p. 67. In 

 "Journ. of Conch." 1886, p. 4S, the slug is described, 

 though without citing the name. It was found at 

 Wilton Woods, Lower Tees, in several stages of 

 growth, and apparently represents a well-defined 

 iocal variety, approaching cinereo-niger somewhat in 

 its coloration. 



7. L. marginatus, var. maculatus, Roeb. A 

 beautiful variety, spotted with black, which occurs 

 frequently in parts of Ireland ; Mr. Delap sent me 

 specimens from near Clonmel, and Roebuck records 

 it from Co. Mayo. This must be regarded as a 

 distinct Irish race, nothing that could be considered 

 identical has been found either in Great Britain or on 

 the continent, and it is such a striking form that it 

 could not easily be overlooked. 



8. L. marginatus, mut. submaculatus, Ckll. 

 Merely a form of maculatus, in which the spots are 

 mostly grey, and partly coalesce, thus forming a 

 transition towards the type. Found in Co. Water- 

 ford. 



9. L. marginatus, mut. decipiens, Ckll. A form 

 with pale spots, of special interest as simulating the 

 normal markings of the allied L. flavus. It has 

 been found more than once in Ireland, and there is 

 a not very characteristic specimen from near Norwich 

 in the British Museum. I know of no continental 

 record, but it is very possible that the var. albo- 

 maculatus of Kreglinger (" Syst. Verz. Deutchl. Binn. 

 Moll.," 1870) is nearly or quite identical. 



10. L. flavus, mut. suffusus, Roeb. Uniformly 

 dark yellowish-grey, without markings ; mantle 

 tinged with yellow anteriorly ; sole yellowish-white. 

 The only example I have seen is the type of the 

 variety, and was found by my brother at Ealing. It 

 might be mistaken for one of the suffused forms of 

 L. maximus, were it not for the colour of the 

 tentacles. No similar form appears to exist on the 

 continent, except that in the Caucasus there is a 

 unicolorous race named by Boettger (1881), L. 

 ecarinatus. According to Simroth ("Nachsch. 

 Port.-Azor. Faun.," 1891, p. 308) the Australian 

 form breckworthianus, Lehm., is also similar. May 

 it not be that the latter is a case of atavism, induced 

 by changed conditions at the Antipodes ? 



11. L, flavus, mut. griseus, Roeb. Like the type, 

 except that the ground-colour is grey, and there is 

 little or none of the yellow mucus which covers 

 typical examples. First found at Bath, and since 

 then occasionally elsewhere, as far north as Renfrew, 

 Scotland. Not observed on the continent, but 

 umbrosus, Phil. (1S44), may be somewhat similar. 



12. L. flavus, mut. antiquorum, (Sowerby, " Gen. 

 of Shells," vol. ii. pi. 158). An ochreous form, 

 with obscure markings, and the interstices of the 

 dorsal rugae dark, producing a finely reticulate effect. 

 There is a large specimen from Chobham (Mus. 

 Leach) in the British Museum. The mut. flavescens, 

 Fer., found on the continent, is very similar. 



13. L. flavus, var. lineolatus, Collinge. Found in 

 Oxfordshire, and very different from any variety of 



flavus known elsewhere. It has yellowish tentacles 

 and a dark brown line down each side of the body : 

 I should suppose, judging from the description, that 

 it was better referable to L. marginatus, but Mr. 

 Collinge assures me that this is not the case. 



Agriolimax (Mbrch.). 



14. A. agrestis, mut. filans (Hoy, 1791), Auctt. 

 Greyish-white with the mantle yellowish. This is 

 one of the ordinary mutations of agrestis, recorded 

 from as far north as Forfar, in Scotland (Roebuck), 

 and south to Italy (Lessona and Pollonera).* 



15. A. agrestis, mut. niger, Butterell. This is a 

 very interesting black variety, first found in Yorkshire, 

 where it seems to be locally common. I have received 

 it, together with the forms tristis, obscurus, and 

 sylvaticus, from Wakefield (J. Wilcock). I have 

 never met with it in the south of England, but 

 it is recorded (Science Gossip, 18S4, p. 78) from 

 Gloucestershire. It is also found in two Scotch 

 counties, Wigtown and Haddington (Roebuck, 1S91), 

 but apparently not in Ireland. It is quite unknown 

 on the continent, but Simroth found it above the 

 zone of cultivation in the Azores. In Sicily and 

 Crete there is a somewhat similar variety (panor- 

 mi t anus, Less, and Poll.), which, however, has a 

 rather differently formed keel on the body, and is 

 said to differ in other minor points of structure. 



16. A. agrestis, mut. griseus, Ckll. Entirely dark 

 greyish ; first found in Lancashire. Dr. Scharff 

 figures a specimen from Co. Dublin, Ireland, This 

 is a partly melanic form, similar to L. flavus, mut. 

 suffusus, and has not been recorded from the con- 

 tinent so far as I am aware. 



17- A. agrestis, mut. albus, Ckll. Pure white; 

 an albino form. Found occasionally in England, 

 and Dr. Scharff ("The Slugs of Ireland," p. 527) 

 records an example from Raheny, Ireland. Mr. F. 

 R. Latchford informs me of a " milk-white " form 

 of agrestis found at Ottawa, Canada, which is pre- 

 sumably albus. I have no record from the continent, 

 but it probably occurs there ; the var. albidus, Picard, 

 Moq.-Tand., with which it is frequently confounded, 

 is different. 



iS. A. agrestis, mut. submaculatus, Wilms. A 



* At Parkstone, in Dorset, I have found an allied mutation, 

 with pale ochreous-brown spots on the mantle, and greyish 

 spots on the body ; tentacles pale brown. The tendency_ in 

 this and Jilans for the mantle to have a warmer coloration 

 than the body, is interesting. 



