THE SUBGENUS CYLINDER. 89 



Square^ London^ S.W., and is, perhaps, the finest speci- 

 men known. Formerly in Mr. Norris^s possession, of 

 Preston. 



The fifth is the specimen now exhibited, as being 

 in my collection at Prestwich. It is not quite so large 

 as Mrs. De BurgVs or the Tankerville specimen, but 

 as finely marked, and of mature growth. Formerly in 

 Mr. Lombe Taylor^s hands, it passed into that of the late 

 Dr. Prevost, of Alen9on, and subsequently into mine. 



The sixth specimen is in France, but a very poor one, 

 collected by M. Carl Bock in his eastern travels, and 

 which I saw sold with a great deal of competition at 

 Stevens's Auction Rooms in July 1880. It was very 

 water-worn, and with a disfiguring sea-break. It was 

 purchased by Mr. Bryce Wright, of Regent Street, for 

 M. Dupuis, of St. Omer. 



The seventh specimen is in Italy. One formerly in the 

 collection of the Hon. Mrs. MacAdam Cathcart, sold 

 to the Marehese Paulucci, of Florence. This specimen is 

 described by Mr. G. B. Sowerby to me as being fairly 

 marked, but filed in the mouth and not in good con- 

 dition. 



The eighth, a very poor, small example, is in the col- 

 lection of Madame Macard, of Utrecht, Holland. 



In the same country it is also reported that there is 

 a specimen in the Amsterdam Museum ; but, on writing 

 for more particulars to Mr. Sowerby, to whom I am much 

 indebted for details, he assures me there is some mistake 

 as to this. There is, however, I believe, one in the 

 Museum at Rotterdam, 



The tenth example known, originally in M. de Verreaux^s 

 possession, is now in that of the King of Portugal, at Lisbon, 

 to whom it was sold by Mr. Damon, of Weymouth. 



In the United States, Mr. Tryon writes me, there is a 



