2i6 Yorkshire Naturalists at Bridlington. 



The seven-banded Helix hortensis, found by the Rev. E. P. 

 Blackburn at Flamborough, is well worthy of note as a very 

 unusual modification, the var, roseolahiata has also been found 

 at Bridlington. 



Of the fresh-water species, especial mention should be made 

 of the immense specimens of Limncea stagnalis and Planorhis 

 Cornells found in the Boynton fish-ponds. They are amor g the 

 finest, British specimens known. 



The discovery of the var. atbocincta of H. rufescens by Mr. 

 Stather, is the only addition to the known conchological fauna 

 of the district. LimncBa glabra, found by Mr. Castle at 

 Boynton, is a strikingly decadent species, and is in some 

 years abundant in grassy pools at Danes' Dyke, many speci- 

 mens being conspicuously decollate. 



Planorhis albus is very fine in ponds on the cliffs at Flam- 

 borough, where Planorbis nautileus and its var. crista are 

 found in abundance. 



Anodonta cygnea is the sole known representative of the 

 Unionidce, and is only as yet recorded from the Boynton fish- 

 ponds. 



Of the Slugs, the most interesting form is Arion ater var.. 

 albolateralis, which has been found near Bempton ; it has pure 

 white sides, and is jet black on the back. It is a very beautiful 

 and striking animal, and in its most characteristic form is 

 restricted to a limited area in North Wales, where it is found 

 quite abundantly. 



Marine Biology. — The Rev. F. H. Woods, B.D., writes : — 

 The condition of the tides made any examination of the shore 

 itself impracticable, and only a few of the most common and 

 familiar molluscs and the like, were found in a living state. 

 But a microscopic examination of drift produced fairly satis- 

 factory results. One of the most striking features was the 

 rather large number of young very fresh specimens of Modio- 

 laria discors, shewing that this rare shell is evidently a native 

 of the neighbourhood. On the other hand, Hydrobia tdvce 

 and Tornatina obtusa, of which there were only one or two 

 specimens, are estuary-loving species, where they occur by 

 the thousand. It seems not unlikely that they, together with 

 a very worn specimen of Mya truncata, have been washed down 

 the coast from Teesmouth, a well-known habitat of the last 

 species. Another probable instance of migration in a passive 

 sense, is the very worn specimen of Cardium norvegicum, the 

 smooth cockle, which appears to be a native of the deep sea 

 in the Hornsea district. The following is a complete list of 

 the species found : — 



Naturalist, 



