20 



NOTES — CONCHOLOGY AND HYMENOPTERA. 



Hargreaves; and from Prestvvich, B. Tomlin — all from ponds or 

 still water. 



BytMnia tentaculata var. ventricosa Jeff. This is described by 

 Jeffreys as white, but I think some misapprehension may arise 

 from this description. I take it that the variety, which is a 

 for??i-vartety, may be white or any other colour. If the true 

 ventricosa be always white, it must be rare. I should be glad to 

 have the views of anyone else, or to hear of locahties where 

 the true variety has been collected. 



NOTES— CONCHOLOG V. 



Monstrosities of various Lancashire Shells.— The occurrence 

 of the following monstrosities in Lancashire has probably not been previously noted, 

 and may be worth a place in your journal. The specimens are in the Wood- 

 wardian collection in the Cambridge Museum. 



Plaiiorbis cofnplanaUis monstr, terebritin Turton : Rochdale. 



Helix aspersa monstr. si?2istrorsum Taylor : Ulverstone. 



Helix aspersa monstrosity in which two shells have grown together: Ulverstone. 



The H. aspersa monstr. si7iistrorsn?7i is not noted in Taylor's monograph of this 

 species (Journ. Conch, vol. iv, p. loo). — Brockton Tomlin, Pembroke College, 

 Cambridge, November 5th. 



Variation in Helix ericetorum near Chester.— While collecting 



Helix ericetoriun Miill.last month on the banks of the Dee near Chester, I came across 

 a form which does not seem hitherto to have been differentiated from the type. It 

 corresponds to the var. siibalbida (Poir.) of Helix virgata, except that the single band 

 left is rather higher up the whorl than in that variety. Its occurrence was very much 

 limited, not more than one in twenty-five, or four per cent. I also secured two 

 fairly representative monstr. scalariforme. The small amount of variation was 

 remarkable, and out of many hundred specimens examined I saw not one approach- 

 ing var. alba. The ' subalbida ' form I have lately taken more commonly in the 

 neighbourhood of Cambridge. In company with Helix ericeioriwi at Chester 

 lived hundreds of Helix caperata Mont., nearly all type with occasional speci- 

 mens of var. alba Picard, and of a unicolorous brown variety. — Brockton 

 ToMLiN, Pembroke College, Cambridge, November 7th, 1886. 



Reversed Specimen of Helix virgata at Coatham.— On Novem- 

 ber 24th I was strolling on the sandhills at Coatham, and was surprised to find 

 Helix virgata still on the move, crawling upon the grass in great numbers. I had 

 not walked far before my eye encountered, with no small delight, a sinistral 

 example. It is alive, and an average-sized specimen of the white variety without 

 bands, so common in that locality. I see ]\Ir. Norman found a sinistral example 

 at Clevedon. I was particularly interested in this find, because it occurred within 

 a few yards of the spot where, some years ago, I found a reversed specimen of 

 Helix aspersa. As these are the only reversed Helices I ever found in my life, and 

 as I do not visit the spot in question oftener than once a year, and then only for a 

 few minutes, one is tempted to see something more than mere chance in the occur- 

 rence of sinistral forms of two species at the same place. — Wm. C. Hey, St. Olave's 

 Vicarage, York, November 25th, 1886. 



NOTE— HYMENOPTERA. 

 Additions to the Yorkshire List of Ichneumonidse.— Part III 



of the Entomological Society's Transactions for 1886 contains a paper by Mr. J. B. 

 Bridgman, F.L.S., on 'Additions to the British List of Ichneumonidae.' This list 

 includes some species sent to him by Mr. G. T. Porritt, F.L.S.; two of them were 

 taken in Yorkshire, and are additional to the list of Yorkshire species. They are 

 Canipoplex zmicincttis Holmg. , and Campoplex trisciilptus Holmg. ; both taken at the 



Green Farm Wood, Doncaster, on May 31st, 1884. — Eds. Nat. 



Naturalist, 



