G. M. Ehlers and J. B. Leighly

“ In the Museum of Geology of the University of Michigan there was recently found a cystid with a label, in Dr. Carl Rominger's handwriting, bearing the name Lepadocrinus hamiltonensis Rominger, and indicating that the specimen was collected at Partridge Point, Thunder Bay, Michigan. This cystid is probably the one that Rominger had in mind [1] when he recorded the occurrence of the genus Lepadocrinus along with several genera and species of corals, echinoderms, bryozoa, brachiopods, and trilobites in the rocks of Partridge Point, which he regarded as belonging to the Hamilton group. ”

“ The hydropore appears as a small circular opening below and between the two parts of the divided madreporite.
Anal opening moderately large, entirely enclosed by plate 13, except for about 2 mm of its periphery, which is formed by the upper edge of plate 8. One basal and 2 upper pectinirhombs, with numerous dichopores, situated respectively on plates 1 and 3, 14 and 15, and 12 and 18. The halves of the pectinirhombs on plates 5, 14, and 12 surrounded by conspicuous raised margins, those on 1, 15, and 18 without mariginal walls. ”

“ The longest-living author of this work died in 1986, so this work is in the public domain in countries and areas where the copyright term is the author's life plus 37 years or less. This work may be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works. ”