﻿ulrich-bassler] revision of paleozoic bryozoa 39 



cumstances, it is thought desirable to fix the essential internal char- 

 acters of the genus as exemplified in the genotype, L. punctatum 

 (Hall), the small illustrations of this species published by the 

 senior author in 1882 being scarcely sufficient for the purpose. We 

 have accordingly prepared the drawings reproduced on plate xi, 7-9. 



Lioclema punctatum is a very abundant fossil in the Keokuk for- 

 mation of the Mississippi valley, and strictly ramose in its habit of 

 growth. It may he readily distinguished from associated ramose 

 bryozoa by its slender branches and the appearance they have to the 

 naked eye of being smooth and as composed of zocecia with small 

 and widely separated apertures. When magnified, the interaper- 

 tural spaces are seen to be occupied by rows of mesopores and 

 numerous acanthopores. 



The publication of most of the Silurian forms is already arranged 

 for in papers by one or both of the writers. The following new 

 Devonian species, having been worked up with the rest, had to be 

 included in this paper, or have its publication postponed indefinitely. 



LIOCLEMA MONROEI new species 

 (Plate XI, 10-12) 



Zoarium subramose, the branches being smooth and cylindrical or 

 compressed, and 10 mm. or less in diameter. Zocecial apertures 

 polygonal, 6 in 2 mm., isolated from each other by small angular 

 mesopores. Diaphragms extremely few in the zocecial tubes, but 

 abundant in the mesopores. Acanthopores large and conspicuous, 

 but rather few. seldom more than three to a zocecium. 



The species is in some respects intermediate between the geno- 

 type L. punctatum and the Chemung species L. occidens (Hall and 

 Whitfield ) . Compared with the former, the more robust branches, 

 less numerous mesopores and acanthopores, and larger zocecia of L. 

 monroei, are features easily recognized. L. occidens has somewhat 

 smaller zocecia and few and smaller acanthopores, and more abun- 

 dant diaphragms in the zocecial tubes. 



This species is named in honor of Air. Charles E. Monroe of Mil- 

 waukee, Wis., who collected the specimens at Bethany, New York. 



Occurrence. — Hamilton formation, Bethany, New York. 



Cat. No. 43.209 U. S. X. M. 



Genus Lioclemella Foerste 

 Lioclemella Foerste, Geol. Surv. Ohio, vn, 1895, p. 600. 

 This genus was briefly defined by Foerste in the work abov< 

 cited and founded upon a common form of the Clinton shales of 



