Plate XX: Silurian and Devonian gastropods

Figure Number Modern genus and species 1889 Genus and species Phyllum or Class Age, etc.
1, 2 same as 1889 Trochonema rectilatera Hall 1872 gastropod Devonian
3 same as 1889 Trochonema yandellana Hall ∓ Whitfield 1872 gastropod Devonian
4-7 Elasmonema bellatulum (Hall) Callonema bellatula (Hall 1861) gastropod Devonian
8, 9 same as 1889 Loxonema hydraulicum Hall ∓ Whitfield 1872 gastropod Devonian
10, 11 ? Cyclonema cancellata (Hall 1843) gastropod Silurian
12, 13 Elasmonema imitator (Hall ∓ Whitfield) Callonema imitator Hall ∓ Whitfield 1872 gastropod Devonian
14, 15 Tornoceras discoideum (Hall) Goniatites discoideus Hall 1860 cephalopod Devonian
16-19 same as 1889 Polyphemopsis louisvillae Hall ∓ Whitfield 1872 gastropod Devonian
20-23 Soleniscus carinatus (Nettelroth) Macrocheilus carinatus n. sp. gastropod Devonian

 

 

 

 

Last Modified on 2019-02-05
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