88 PROCEEDINGS OF THE MIDLAND .MALACOLO:;iCAL SOCIETY. 



NOTES. 

 Limax nyetelius, Bgt., in Washington. On May 19, 1S99, I found a 



number of L. nydrlhis, alive and healthy, in the sheathing bases of the leaves of 

 a date palm just imported from Orleansville, Algeria. This is of interest as indi- 

 cating the habits of the slug, and the way in which it may be carried from one 

 country to another; but the other palms of the same lot were sent to Arizona, 

 where I afterwards saw them, and if there were any slugs upon them I am sure 

 they could not survive. — T. D. A. Cockf.rell. 



Psammobia ferroensis var.. pallida.— In the Journal of Conchology, 



1901, p. 14, I see 1'. frrroc/isis v. paHuJu, Marshall. Is not this subsequent to 

 F. fcrrucnsis v. pallida, Ckll., Zoologist. 1887, p. 115? I presume they are identical, 

 but I think Mr. Marshall must have overlooked my description. — 



T. D. A. COCKEREI.L. 



Conehological Society : Cummitfce fur Colkdivc investigation.— The fol- 

 lowing are the subjects for enquiry proposed for 1901 — 1902. Returns should reach 

 the Secretary (A. E. Boycott, The Grange, Hereford) by September ist, 1902. 



i. — Do you find Vallonia jndclieUa and the form costuta together or separately? 

 in dry or moist situations? do intermediate forms occur? does each form seem to 

 affect a particular kind of habitat ? 



ii.— Do Tachca )nemoral is anal T. hoi-trns is occur together or separately? (i) in 

 the same district? (2) in the same locality (hedgebank etc.)? is there any difference 

 in the nature of the habitat most affected by each species? 



iii. — Do Clausilia rugosa (hidentata) and Balla picrvcrsa occur together? what 

 habitats are they found in ? 



iv. — Are there any constant differences between the radulae of (i) Jfi/alinia 

 ccltaria and I{. alliaria, (2) Limnaca pcrcgra and L. auricular id., (3) Succinea 

 2)utris and S. clcgans, (4) Tachca ncmoralis and T. horfcnsis? 



V. — Record the circumstances attending the periodical disappearance to which 

 certain species, such as A. i/lutinosa, If. fusca, and V. cdcntula, are subject. How 

 are such disappearances to be accounted for ? 



PROCEEDINGS OF THE 

 MIDLAND MALACOLOGIGAL SOCIETY. 



28TU Meeting, May iotii, 1901. 



The President in the chair. 



Various donations to the Library were announced, including a valuable series of 

 works from Prof. L. H. Plate. 



Exhibits. 



The President exhibited and made some remarks upon various collections of 

 shells from Tavoy, Amherst, and the Philippines. 



By Mr. H. Overton : Decollated specimens of Clausilia laminala from Glouces- 

 tershire. 



By Mr. Brecden : Ilclix ncmoralis and varieties, and Arivn oiipiricuruni v. 

 hicolor from Capel Curig. 



