IO CRICK : BIBLIOGRAPHY OF NORTHAMPTONSHIRE MOLLUSCA. 



The shells of some one or more of the above may be abnormal 

 in shape or size, major (dia. 25, alt. 19 m.m.), minor ("remarkably 

 diminutive "), compressa (dia. 22-5, alt. 15 m.m.), conica (dia. 21*5, 

 alt. 19 m.m.), tenuis, sinisirorsa, scalarifonnis, each more or less 

 characteristic, have been recorded. 



The band formula (:::::) undulata, must be interpreted to imply 

 that all the bands are broken into patches, and at the same time 

 confluent, so as to result in distinct transverse coloured streaks. 



It is not thought desirable to extend the table beyond its present 

 limits, which is based on recent records, and compiled from such 

 sources as were at hand ; neither does it profess to be complete, but 

 to embrace the great majority of forms prevailing in this country. 



The ? inserted is an indication of insufficient evidence. 



BIBLIOGRAPHY OF THE LAND AND FRESHWATER 

 MOLLUSCA OF NORTHAMPTONSHIRE. 



By Walter D. Crick, 

 Northampton. 



1706. — J. Morton. — "A Letter from the Reverend Mr. Morton, 

 A.M., and S.R.S., to Dr. Hans Sloane, S. R. Seer., containing 

 a Relation of River and other Shells digg'd up, together with 

 various Vegetable Bodies, in a Bituminous Marshy Earth, near 

 Mears-Ashby in Northamptonshire, with some Reflections there- 

 upon. As also an Account of the progress he has made in the 

 Natural History of Northamptonshire." Phil. Trans., xxv., 1706, 

 No. 305, Art. IV. Reprinted in Journ. Northamp., N.H. Soc, 

 vol. iii., p. 315, 1885. 



1712. — J. Morton.— " The Natural History of Northamptonshire ; 

 with some Account of the Antiquities. To which is annex'd a 

 Transcript of Doomsday Book, so far as it relates to that County." 

 London, 1712. Chap. VII. of Brute Animals (p. 414). The 

 part relating to the Mollusca was reprinted, with explanations, 

 in Journ. Northants. N. H. Soc, vol. iii., p. 316, 1885. 



1803. — G. Montagu. — "Testacea Britannica, or Natural History of 

 British Shells." — P. 288, Trochus terrestris Penn ( = Hy. fulvus) ; 

 p. 343, Turbo elegans Gmel. ( = Cyclos. elegans) ; p. 393, Helix 

 obscura Gmel. ( = Bulimus obseurus) ; p. 406, H. pomatia ; p. 430, 

 H. aculeata ; p. 440, H. paludosa Da Costa ( = H. pulchelld). 



