EAKLY PALEOZOIC BRYOZOA OP THE BALTIC PROVINCES. 91 



Genus ANOLOTICHIA Ulrich. 



Anolotichia Ulrich, Geol. Surv. Illinois, vol. 8, 1890, pp. 381, 473; Geo!, and Nat. 

 Hist. Surv. Minnesota, vol. 3, pt. 1, 1893, p. 326; Zittel's Textbook of Pale- 

 ontology (Eng. ed.), 1896, p. 268.— Nickles and Bassler, Bull. 173, U. S. 

 Geol. Surv., 1900, p. 24. 



Zoarium ramose, digitate, laminate, or incrusting; zooecial tubes 

 long, subpolygonal, intersected by remote diaphragms; lunarium 

 elevated at the surface, traversed by two to six minute, vertical, 

 closely tabulated tubes; mesopores sparingly developed. 



Genotype. — Anolotichia poTiderosa Ulrich. Earliest Silurian (Rich- 

 mond) of Illinois. 



Wlien this genus was established by Ulrich, the genotype and 

 another species were all that were known possessing the character- 

 istic minute lunarial tubes. Since then four or five new forms have 

 been identified in American strata, and these, with the new Russian 

 species here described, constitute a fair representation for the genus. 

 With the discovery of these additional species, the shape of the 

 zoarium pertaining to the genus has been extended to include para- 

 sitic and free explanate forms. Several writers have considered the 

 occurrence of minute tubuli traversing the lunarium longitudinally 

 a character of too little importance for generic recognition, but their 

 presence in at least eleven distinct species seems sufficient answer to 

 such criticism. Sardeson, in describing Anolotichia impolita, in his 

 discussion of the ''Problem of the Monticuliporidea," ^ seems to 

 regard the lunarial tubes as deceptive lucid spots at the tooth-like 

 points of the lunarium, and not distinct pores at all. I may be 

 misjudging him as his language is not clear to me, but, nevertheless, 

 it is a fact that distinct tubuli, varying from one to seven in different 

 species, do penetrate the lunarial walls and retain their structure no 

 matter whether the cells are filled with calcite or clay. Moreover, 

 these small tubes are crossed at frequent intervals by distinct tabulae, 

 an occurrence which I have verified in u number of instances and 

 which indicates to me that these pores certainly contained modified 

 polyps or were occupied by some other definite structure. 



In its wall structure, Anolotichia is a typical ceramoporoid, and, 

 aside from the lunarial tubuli which form the most distinctive generic 

 character, the genus is closely related to Chiloporella and Crepipora. 

 Tliin sections are almost always a necessity in distinguishing the 

 lunarial tubuli, although sometimes they may be seen distinctly 

 under a hand lens when the surface is rubbed smooth and then 

 shghtly etched with acid. Hitherto, mural pores, allowing communi- 

 cation between the zooecia as in Ceramopora, have not been observed 

 in Anolotichia, but their occurrence in several undoubted species of 

 the latter genus was discovered in the course of the present study. 



1 Journal of Geology, vol. 9, Nos. 1 and 2, 1901, pp. 1, 149. 

 92602°— Bull. 77—11 8 



