318 PALAEOZOIC PUPILLID^. 



While this genus has generally been referred to the Pupil- 

 lidas, it has an equal resemblance to such Urocoptidse as Micro- 

 ceramus. That there is any direct relationship with the latter 

 genus is highly improbable, though it might be an ancestral 

 form of the same family. The type species, D. vestusta has 

 the general figure of Abida, and is about 8 mm. long. Its egg 

 capsules containing the young shell have been found (pi. 32, 

 fig. 24, X 16). 



Dendropupa vetusta (Dawson). Pupa vetusta Dawson, 

 Quart. Journ. Geol. Soc. London, XVI, 1860, p. 270, f. 1-3 

 Arcadian Geology, 1868, p. 383, f. 149; Amer. Journ. of Sci 

 (3), XX, 1880, p. 405, f. 1-4, p. 412, f. 14a; with var. tenui 

 striata, pp. 406, 412, f. 146.— Salter, The Geologist, 1861, p 

 178, f. 1. — Dendropupa vetusta Fischer, Journ. de Conchyl. 

 vol. 33, 1885, p. 101. Middle Pennsylvanian : South Joggins 

 Nova Scotia, in stump of Sigillaria. 



Dendropupa walchiarum Fischer, Journ. de Conchyl., vol. 

 33, 1885, p. 100, fig. 1. Middle Permian: Chambois (Saone- 

 et-Loire). 



Species of uncertain position. 



Pupa bigsbyi Dawson, Amer. Journ. Science (3), XX, 1880, 

 p. 410, f. 5, 6. — Dendropupa bigsoyi Fischer, Journ. de Con- 

 chyl., 1885, p. 102. Middle Pennsylvanian: South Joggins, 

 N. S., with P. vetusta. 



A smaller species than D. vetusta, smooth, and according to 

 Dawson, belonging to a different group of Pupae. The aper- 

 ture is imperfectly known and its generic relations therefore 

 doubtful. 



Pupa primaeva G. F. Matthew, Proc. and Trans. Roy. Soc. 

 Canada for 1894, XII, 1895, section iv, p. 98, pi. 1, f. 10a, b. 

 Pennsylvanian : Little River Group : Fern Ledges, Lancaster, 

 St. John Co., N. B., in Plant Bed No. 2. 



As the aperture is unknown, this species cannot be definitely 

 classified. With sculpture like Dendropupa, it has fewer and 

 longer whorls. It occurred in the same bed in which Stro- 

 phites grandceva was found. 



