PALEONTOLOGY. 293 



Keport N. Y. Mas. Nat. Uist., p. :Hi'2, pi. x, 1'. 0, 10). The aiiMior refVuvs 

 to the siiiiie genus the spceies J'Jucidi/ptocrinus armosus, MeOhesney 

 (= Glyptocrinus armoHun, ITall). 



The late U. P. James (131) i)ablishe(l a reprint of the description of 

 Agelncrinus Holbrooli, U. P. James, page 25, with a iigure. 



W. R. Billings (IG) published the following new genus and species 

 from the Trenton formation of Ottawa and neighborhood : Ottaicacri- 

 nus, gen. nov., and O. typus, sp. nov., p. 49, Calceocrhius furcillatiis, sp. 

 uov., p. 51, (7. rugodus, sp. nov., p. 53. 



THE MOLLITSCOIDA. 



A few papers have been written on the Polyzoa and Brachiopods 

 which do not fall into any of the other divisions of this report. 



C. Kominger (227) describes a new form of Bryozoa from the drift of 

 Ann Arbor, Michigan, under the name of Patellapora stellata., sp. uov., 

 p. 11, pi. i, f. 10. 



Joseph F. James has a short note (125) on the value of the internal 

 sections of corals when used for specific characters, considering them 

 to be of small value because of the great variation they show, and of 

 the different forms presented according to the relation of the plane of 

 the section to the individual cells. 



A. F. Foerste (82) and E. O Ulrich (210) reply to Mr. James's criticism, 

 defending the methods in use by Mr. Ulrich and Mr. Ford. 



J. F. James (128) presents a ])aper " on the MonticuUpora a coral, not 

 a Polyzoan.'' lie had already published an elaborate review of the 

 Trenton MonticuliporoidiiB (130). In the present paper the author re- 

 views the characters of the family Monticulporoida^ of Nicholson, in- 

 cluding the geuGrii MonticuUpora and Geramopora, and defends the view 

 of Nicholson in placing them among the Coelenterata near the Ilelio- 

 porid.ne, as opposed to the classification ofE. O. Ulrich, wiio classes them 

 with the Polyzoa, " Bryozoa." 



H. A. Nicholson (202) writes on certain anomalous organisms which 

 are concerned in the formation of the Palaeozoic limestones. In the 

 course of the paper he defines them under the names Mitchddeania gre- 

 gariaj n. sp., p. 10, f. 1, 2, and Solcnopora tiliformis, n, sp., p. 21, f. 4. 



The characters of the genus (rirvanella, Nicholson and Etheridge, 1880, 

 are also <liscussed, and comparisons are made with related American 

 forms. In anothoi- i)a])er (201) Professor Nicholson comments n])on 

 new or iinperft^ctly known species of 8tromatoi)orids. No new species 

 are described, but some American species are figured with descriptions 

 and notes upon their characters. 



E. (). Ulrich (218) dis<Misses the genus Sccpiropora with remarks upon 

 Helopora, Hall. The author describes and figures a new genus and 

 species of Lower Silurian rolyzoau. under the name t^ccptroporti /acuta., 

 gen. et sp. nov., \^\^. 228,22!>, obtained from Manitoba, and also from 

 two localities in Illinois. He considers the. systematic position of the 



