Lepidoptera. ^77 



EucUdia mi and E. f^lyphica have been taken at Croham 

 Hurst, Reigate, near Warlingham, and in other spots, and 

 Phytomctm cenea have been obtained commonly from Reigate. 

 From this we see that out of 796 species belongmg to the six 

 groups already named, we have records from this district of 

 405, and five others which may be considered as not authenti- 

 cated, being rather more than one-half. This number, we 

 have reason to believe, will be considerably augmented even 

 this season, but of course there are a large proportion ot 

 insects which we may not expect to obtain here, but whose 

 habitats are either northern, marshy, littoral, or confined to 

 that El Dorado of entomologists, the New Forest. 



N.B.— The list referred to in this paper can be examined or 

 added to upon application to any member of the Zoological 



Sub-Committee. 



Edward Lovett. 



February, 1883. 



35. — Parasites on some Mollusca. 

 By the Rev. George Bailey, M.A. 



{Read i^th March, 1883.] 



Last August I took a number of Limiiea stagnalis from the 

 pond at Croham Hurst, and kept them alive in a bell-glass 

 for observation. I soon noticed what appeared like a delicate 

 fringe about the neck, head, and tentacles. A closer examina- 

 tion made it manifest that these mollusca were infested with 

 creatures, we may conveniently term parasites, which waved 

 to and fro continually, as though feeding upon something they 

 obtained in the water. The Limner gave no signs of dis- 

 comfort, though there must have been many scores of these 

 " hangers on " attached to each mollusc. Several were 

 detached by means of a fine sable brush, and I carefully 

 watched their movements, and was for some time puzzled 

 by their appearance and method of locomotion. They 

 resembled worms in the form of their bodies, and in the fact 

 that numerous setee were visible, but they moved after the 

 manner of leeches, attaching themselves to the glass cell, and 

 not attempting in any way to swim freely. 



Thus far I had used a i inch Obj. Then they were 

 examined under i Obj., and I soon felt convinced that the 

 subject of enquiry was a Naid Worm. Naid worms are des- 

 cribed as " aquatic animals, living among plants or burrowing 

 in mud." One species, however, is affirmed to have parasitic 



