272 PKOCEEDINGS OP THE MALACOLOGICAL SOCIETY. 



NOTES 



Note ok the Hoeizok and Locality of the Type-specimen op 

 Pleuronautilus pulcher, G. C. Crick. {Read lOth March, 1905.)— 

 The species Pleuronautihis pulcher, described by the present writer in the 

 Proceedings of the Malacological Society of London for March, 1904 

 (pp. 15-20, pi. ii), was founded upon four examples and a fragruent, two 

 of the specimens and the fragment being in the British Museum collection, 

 the other examples forming part of the collection of Dr, Wheeltou Hind, 

 Stoke-on-Trent. 



Dr. Hind's specimens were obtained from the ' Pendleside Series ' 

 (Carboniferous) at Hebden Bridge, Yorkshire. Of the British Museum 

 examples only the fragment is localized ; this is stated to be from the 

 ' Millstone Grit ' (i.e. the Pendleside Series) at Hebden Bridge. The 

 smaller specimen in the national collection belonged to the Gilbertsou 

 Collection, but its locality is unrecorded. The larger specimen, which was 

 selected as the type because it exhibited all the characters of the species, 

 belonged to the collection of the late J. W. Davis, of Halifax, and though 

 the precise locality whence it was obtained has not been recorded, the 

 present writer pointed out the fact that its matrix agreed with that of the 

 examples from Hebden Bridge. 



The type-specimen was received among some specimens in a small box 

 without a label ; but according to an inventory of Mr. Davis's collection 

 made by Dr. A. S. Woodward prior to the acquisition of the collection by 

 the British Museum in 1895, this box of fossils was obtained from Hebden 

 Bridge, about eight miles west of Halifax. This fact, then, enables us to fix 

 the horizon and locality of the type-specimen of Pleitronautilus pulcher as 

 the ' Pendleside Series ' (Carboniferous), Hebden Bridge, Yorkshire. So 

 far as is known to the present writer, this is the only locality which has 

 yielded examples of this species. 



G. C. Crick. 



Note on the Vitality of three Species of Littoeina. {Read 

 \Oth March, 1905.)— It is a well-known fact that land and fresh-water 

 Mollusca remain dormant for considerable periods, but instances among 

 marine forms are much less common and therefore worthy of record. 

 Recently Lieut.-Colonel L. W. Wilmer received from a relative some 

 specimens of Littonna which had been collected at Havana on January 11th 

 of the present year. On that day they were packed in a tin box, which 

 was not opened until February 24th, a period of over six weeks. On 

 being immersed in sea water they very soon showed signs of life, and 

 began to crawl about the vessel in which they had been placed. The 

 species are Littorina muricata, Linn., carinata, d'Orbigny, and trochiformis, 

 Dillwyn. Some remarks on the great vitality of the first of these have 



