R. Bullen Newton — 8aifs Types of Maryland MoUusca. 303 



Fig. 1. — The Neo-Volcanic Chains of the Japanese Islands (p. 298). 

 Cliishinia chain. YaTiiko chain. Nasu chain. 



Fuji chaia. Iwaki chain. Ogasawara chain. 



Kiiishima chain. 



Myoko group. 



Yatsugatake group. 



Fuji. 



Ashitaka. 



Hakone. 



Atami. 



Izu. 



Oshima. 



Toshima. 



Nii-jima. 



Kita-shima. 



Ototo-jima. 



Aoi-jima. 



Hyotau-jima. 



Nishi-jima. 



Hitomaru-jima. 



Higashi-jima. 



Haha-jima. 

 Kita-mura. 

 Sekimon-yama. 

 Big Bay. 

 Chihusa-yama. 



K5zu-shima. 

 Miyake-jima. 

 Mitura-jima. 

 Hachijo-jima. 



Aoga-shima. 

 Bayonnaise Rocks. 

 Smith's Island. 

 Tori-shima 

 Lot's Wife Rock. 

 Rosario-jima. 



Fig. 2. — The Chichi-jima Sub 

 Chichi-jima. 

 Mikazuki-yama. 

 Omui'a. 



Futami Harbour. 

 Hatsuue-iu'a. 

 dgi-ura. 

 Yagi-jima. 



Fig. 3. — The Haha-jima Sub-group (p. 299). 



Nishi-iu'a. Hira-sliinia. 



Oldmura. Muko-jinia. 



Matsun-boshi. Aue-jinia. 



Maru-shima. ImSto-jima. 



Futago-jinia. Mei-jima. 



Kita-iwo-jima. 



I\v5-jima. 



Miuanii - i w5 - j ima . 



Tokyo. 



Muko-jinia sub-group. 



Chichi-jima sub-group. 



Haha-jima sub-group. 



Izu-shichito. 



Ogasa-^vara group. 



Sulphur Island group. 



• GROUP (p. 299). 



Kitafukurozawa. 



Minami-fukurozawa. 



Taka-yama. 



Tatsumi-ura. 



Minami-zaki. 



Minami-jima. 



IV. — List of Thomas Say's Types of Maryland (U.S.) Tertiary 



Mollusca in the British Museum. 



By R. Bullen Newton, F.G.S. 



TO those students interested in the pal£eontology of Maryland, 

 United States, it may be welcome intelligence to know that the 

 "John Finch Collection" of Tertiary Mollusca from that State, 

 including some of the type-specimens figured and described by 

 Thomas Say ^ in 1824, is in the possession of the British Museum. 

 This fact has only recently been recognized through the examination 

 of certain documentary evidence connected with the history of the 

 fossil invertebrate collections contained in that institution. 



During the early days of palasontological science it is quite 

 apparent that types were not valued as they are now, for the 

 specimens under consideration have escaped anything like proper 

 recognition up to the present time. Without registration numbers 

 and without labels, therefore, considerable care has had to be dis- 

 played in selecting from the extensive series of American Tertiary 

 shells in the Museum those particular forms which agreed with the 

 descriptions and figures of Thomas Say. The importance of these 

 types can scarcely be over-estimated, since they form the material 

 on which was based the first systematic description of Maryland 

 Tertiary Mollusca. The collector, John Finch, was himself a pro- 

 fessor of geology and an authority on the Tertiary deposits of the 



1 "An Account of some of the Fossil Shells of Maryland": Jouru. Acad. Nat. 

 Sci. Philadelphia, 1824, vol. iv, pt. 1, pp. 124-155, pis. vii-xiii. 



