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CRUISE OF THE NEPTUNE 



As the want of septa in the Cape Chidley specimens may be due 

 to imperfect fossilization, Labyrinthites is, on account of its mode 

 of growth, provisionally classed with the Halysitidce. 



Labyriniliites chidlensis. Sp. nov. 



Corallum massive, composed of slender, straight, upright coral- 

 lites with numerous interspaces. Corallites a little less than -33 mm. 

 in average diameter, quadrangular or five or six sides in transverse 

 outline, with rather thick walls. Each corallite coalesces along its 

 entire length with two or three adjacent ones, giving rise to a mean- 

 dering succession of tubes inclosing narrow spaces not wider than the 

 corallites themselves. In the specimens examined the corallites reach 

 a maximum length of -30 mm. In longitudinal sections tabulaB, in the 

 form of thin, flat, transverse plates across the corallites, are observed, 

 between -5 and 1 - 5 mm. apart. There are no tubules between con- 

 tiguous corallites, and the mural union appears to be complete. 



Dr. Ami, who is studying the groups of fossils, other than the 

 corals, obtained by Mr. Low at Cape Chidley, informs me that the 

 majority of the Cape Chidley fossils are referable to the Ordovician, 

 whilst two specimens are of Slurian age. The lithological character 

 of the rock in which the coral is preserved appears to more nearly 

 approach that of the Ordovician specimens. 



