ulrich-bassler] revision of paleozoic bryozoa 261 



classification of the American Paleozoic Bryozoa by Ulrich, and 

 the first definite assignment of Ascodictyon and Rhopalonaria to the 

 Ctcnostomata. The two genera are referred to a single family — 

 the Ascodictyonidce. 



In 1891^. Whiteaves described a species clearly referable to our 

 new genus Allonenia as Stomatopora moniliformis Whiteaves. It 

 is from the Devonian, forty miles above the mouth of Hay river, 

 Canada. 



In 1892,- in a paper entitled " British Paleozoic Ctenostomatous 

 Polyzoa," Vine again takes up the discussion of the Ascodictyonidce, 

 and returns to the opinions representing their relations suggested 

 in his paper of 1884. Beginning with a good review of the subject, 

 the paper continues with brief but pertinent remarks on five of the 

 living families of the Ctcnostomata, and concludes with descriptions 

 of and critical remarks on the ten British species now referred more 

 or less confidently to the Ctcnostomata. Of these, Ascodictyon 

 yoiingi Vine, from the Lower Carboniferous shales of Scotland, is 

 described for the first time. 



In January, 1893, when advance copies of the work were dis- 

 tributed, and in 1895, when the volume of which it is a part was 

 issued,^ Ulrich republished the original diagnosis and figures of 

 Vinella. Accompanying this are figures and descriptions of two 

 other forms of this genus, Vinella radialis Ulrich, and Vinella 

 radiciforniis var. confcrta Ulrich, and also of Ascodictyon stellatum 

 Nicholson and Etheridge, Jr., and Rhopalonaria venosa Ulrich. The 

 propriety of including the three genera Ascodictyon, Vinella, and 

 Rhopalonaria in one family, the Ascodictyonidce, is doubted. The 

 author states further that he is " satisfied that Rhopalonaria at least, 

 which is evidently related to the recent Arachnidinm Hincks, belongs 

 to a distinct family." This family, Rhopalonariidce, was recognized 

 by Nickles and Bassler in the classification published by them in 

 1900.'* 



In 1897^ Simpson published copies of descriptions and figures 

 of some of the Paleozoic Ctcnostomata described by previous writers. 

 No new matter is added concerning the order of Bryozoa under 

 consideration. Miller's brief description of Ascodictyon and 



^ Contr. to Canadian Paleontology, vol. i, p. 212. 



^ Proc. Yorkshire Geol. & Polytech. Soc., n. s., xii, pt. i, pp. 74~93- 



^ Gcol. of Minnesota, Final Rept., iii, pt. i, chap, iv, " On Lower Silurian 

 Br3'ozoa of Minnesota." 



^ " Synopsis of the American Fossil Bryozoa," Bull. 173, U. S. Geol. Surv., 

 p. 19. 



^Fourteenth Ann. Rep. State Geol. New York. 



