TRANSACTIONS OF THE SECTIONS. . 1387 
led to make a careful reexamination of the matter—with the result of satisfying 
every microscopist who has seen his preparations of the unmistakably Nwmmuline 
character of the “proper wall” of the chambers as discovered and described by 
Dr. Carpenter ten years ago. 
_ On Atya spinipes, and on an undescribed Pontonia. 
By Professor CuNNINGHAM. 
On English Nomenclature in Systematic Biology. 
By HE. Ray Lanxzsrer, M.A. 
On the Genealogical Import of the Internal Shell of Mollusca. 
By HK. Ray Lanxesrer, M.A. 
On Spring Migratory Birds of the North of England. By T. Lisrmr. 
The observations made by the author at Barnsley, Yorkshire, during the years 
1853-74 are embodied in the following list :— 
Approximate 
Average date of date of 
first notice. departure. 
Redstart (Ruticilla phenicura) ............ April 15. September 20. 
Whin-Chat (Sazicola rubetra)...........05. April 20. September 22. 
Wheatear (S. @nanthe)... 00... ccs cee eens arch 28. September 30. 
Grasshopper Warbler (Salicaria locustella).... April 26. September 5. 
Sedge- Warbler (S. phragmitis) .........+.. April 22. August 31. 
Reed-Warbler (S. strepera) ......... Haya: 
Nightingale (Luscinia philomela)........++.+ April 25 July 27. 
Blackcap (Sylvia atricapilla) ..........000s April 21. October 10. 
Garden Warbler (S. hortensis)............45 May 6. September 10. 
Whitethroat (S. cinerea) . 0.0... cece eee April 24. September 27. 
Lesser Whitethroat (S. sylviella)............ April 28. September 15. 
Wood-Wren (Phyllopneuste sibilatriz) ...... April 30. September 18. 
Willow-Wren (P. trochilus)..........00000 April 10. September 26. 
AUIS (@ 224277) eens OOO On eInannE March 29. October 4. 
Ray’s Wagtail (Motacilla Rayi) ............ April 13. September 14. 
Tree-Pipit (Anthus arboreus) .........0.055 April 15. September 22. 
Swallow (Hirundo rustica) .......6...6005- April 10. October 15. 
Upinb lal (CEPMUNDICE)| Narsitad selsisinie cs ivee > cele els April 13. October 12. 
Sand-Martin (ZZ. riparia). ....... 0c eee April 10. September 20. 
MS Wale ( Cyiprsererd, AINUR)) os a ih osa.« wlnie\s eps sieve ay 22. August 15. 
Nightjar ( Caprimulgus ewrope@us) .....0++6. May 21. August 30. 
Grey Flycatcher (Muscicapa grisola) ........ May 14 September 2. 
Pied Flycatcher (M. atricapilla) ............ 
Cuckoo ( Cuculus canorus)... 60.00 eee cree April 14. August 25, 
Land-Rail ( Crea pratensis) ........00eee es April 22 October 5. 
Some rare migrants, the dates of which cannot be furnished, have occurred in 
Yorkshire and the north of England, as the Hoopoe, Wryneck, Bee-eater, Roller, 
Spotted Sandpiper, Spotted Crake, and Baillon’s Crake. 
On two new Species of Pentastoma. By Professor MacaxisTErR. 
Yotes on the Specimen of Selache maximus lately caught at Innisboffin. 
By Professor Macarister. 
