A study of the James types of Ordovician and Silurian Bryozoa

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1906 edition. Excerpt: ...and J AMm, Jour. Cincinnati Soc. Nat. Hist., X, The name Ohaetete's $lt'I'b’iIL(ZtlLIIL was proposed tentatively in 187 8 for specimens difl"ering from Uhaetetes petropolitanus in being turbinate in form and in having the basal attachment small. 0. turbinat-um was stated to range from the lowest to the highest exposed beds at Cincinnati and vicinity. Now just which one of the six or more massive bryozoa occurring in this range of strata at Cincinnati was considered as Ohaetetes petropolitanus can never be accurately determined from the literature, and none of the specimens in the James’s collection is labelled so as to‘ indicate which form that author had in mind. This first reference to Uhaetetes turbimzmm is therefore of no value, the name being little more than a nomen nuduml In 1879 Ulrich described 0haetetes subglobususfl which James and James recognized as a synonym of their C’. turbimztum in 1888,” when aJ our. Cincinnati Nat. Hist., II, 1879, p. 129, pl. XI, figs. 11--11b. bIdem., X, 1888, p. 161. 0 they figured and described their species for the first time, the original definition being merely a comparison with an incorrectly identified Cincinnati species. In the paper mentioned the latter authors figure two specimens which in the collection are labelled as the types of the species. These specimens agree in one character only, namely, the turbinate growth ascribed to the species by the authors. The zooecia of each, however, are so difierent in size, shape, and arrangement that a lens is not necessary to determine that the two specimens represent very distinct species. The original of fig. 1b“ is a specimen of Uyp/wtrypa aceroulosa (Ulrich)/’ a species hitherto known only from the...