Yorkshire Naturalists at Burnsall. 275 
In the Hartlington Ghyll the same types were seen. On the 
tree trunks here and previously, Dicranoweisia cirrata was 
gathered in good fruit. Mr. H. E. Johnson submitted many of 
the critical species to Mr. W. Ingham, to whom thanks are due 
for verification. 
_ NEUROPTERA AND TRICHOPTERA :—Mr. G. T. Porritt reports 
that in consequence of the violent wind it was quite impossible 
to work for Neuroptera and Trichoptera with any satisfaction. 
The district is a good one for these insects, but under the cir- 
cumstances only the following were noted :—Perla maxima, 
Chloroperla grammatica, Isopteryx tripunctata, Nemoura cinerea, 
emerobius micans, and Agapetus comatus. 
GroLocy.—Dr. A. Wilmore, F.G.S., writes :—Over a dozen 
geologists were met at Skipton where the general build of the 
district between Skipton and Rylstone was pointed out. The 
anticline at Hawbank Tunnell was clearly seen. On reaching 
Rylstone the party proceeded to Hetton where an old quarry 
with Tournaisian limestones dipping North at about 65° was 
inspected. Here several of the characteristic fossils were 
obtained :—Syringopora reticulata, Caninia cylindrica, Orthotetes 
crenistria and Productus pustulosus being the chief. 
From Hetton, the party proceeded to exposures near 
Skelda Gate, where evidence of folding was seen. Here also 
more specimens of the above-named fossils were obtained, 
together with Chonetes, sp. The next exposures were at Win- 
terburn where a large quarry showed abundance of Caninia 
cylindrica, and most of the other fossils were seen. Michelinia 
megastoma was also secured. 
The party next walked back to Rylstone where a very 
fossiliferous quarry in the upper (Visean) limestone was visited. 
Here were obtained abundant specimens of Zaphrentis amplex- 
oides, Denstphyllum sp., Lophophyllum sp. and some good 
Cephalopods, especially a good specimen of Pyrolecanites com- 
pressus. 
The afternoon party was met at Rylstone station and 
numbered about 30. Cracoe Gill was first visited. Here 
the lower limestones are seen to be much disturbed. Upper 
fossiliferous beds of somewhat knoll type were examined at 
the upper end of the gill. Here were seen numerous Brachio- 
pods, Corals, and Polyzoa. The Pendleside beds, with their 
characteristic fossils, are seen almost in contact with the white 
limestones at this point. 
The next exposure visited was the large quarry worked 
by Messrs. P. and W. Spencer, whose manager, Mr. Todd, 
kindly met the members and gave permission to inspect the 
rocks. Many fossils were seen here of characteristic knoll type. 
The writer gave some account of the problem of the limestone 
knolls and of the various explanations which have been offered. 
1913 July 1. 
