2l6 NEV/ YORK STATE MUSEUM 



ZaphrentfS' incondita Billings 



Zaphrentis incondita Billings. Palaeozoic Fossils, v. 2, pt i. 1874. p. 7, 



pi. I, fig. 1-2 _ _ _ 



Zaphrentis incondita Lambe. Contributions to Canadian Paleontology. 

 V. 4, pt 2. 1901. p. 123 



Original description. Corallum simple, turbinate and strongly curved at the base, 

 becoming cylindrical above; nine or more inch-es in length and over two inches in 

 diameter. From the acute base upwards it expands to a thickness of about fifteen lines in 

 a length of two inches, and to twenty-four lines in four inches; above which the body of 

 the coral becomes more nearly cylindrical, or only very gradually increasing in diameter. 

 Surface with numerous engirdling ridges of various sizes, the larger are from half a line to 

 five lines in width, and are often angular on their crests. Upon these larger ridges and 

 in the grooves between them are numerous smaller ridges or transverse striae, generally 

 two or three in a width of one line. The longitudinal, or septal striae, are in general only 

 obscurely seen, being obliterated by the transverse grooves; there are five or six of them 

 in the width of three lines. 



In the interior of the coral, the radiating septa reach the center in the basal portion. 

 But, above a diameter of one inch, there is a large space in the center (as shown in fig. id) 

 occupied by the transverse diaphragms alone, the septa not extending more than half an 

 inch inward. There are two sets of them, the smaller projecting upward rarely to the 

 depth of one line. There is one of the smaller between each two of the longer. 



The transverse diaphragms are well developed. They are much undulated in the 

 central portion (as shown in fig. ii^) and strongly curved downwards near the exterior. 

 There appear to be ten or twelve of them in the length of one inch; but, owing to their 

 undulations, there are sometimes places in which they are separated to the distance of two 

 or three lines, while elsewhere they may be nearly in contact. The septal fossette has not 

 been observed. 



Varieties. Occurring along with the above is a somewhat more slender form with, in 

 a general way, the same external characters, but with the transverse diaphragms more 

 regular and the septa extending inward nearly to the center. (Figs. 2, 2(J, 2h) One speci- 

 men has a diameter of eighteen lines and another sixteen lines. 



A third s^Decimen is only twelve lines in diameter, with the same characters as the 

 last two. 



The materials are not sufficient to enable us to decide positively whether they all 

 belong to the same species or not. Should there be more than one species, the specific 

 name above given ought to be retained for the larger form first above described. 



Locality and for7nation. Indian Cove, Gaspe, in the Gaspe limestone, no. 8. 



This, according to Billings, is one of the undetermined species of 

 Zaphrentis referred to by Logan \Geology of Canada, p. 393] as occurring 

 in his uppermost division (8). The species is the common cyathophylloid 

 of the rocks and all our specimens seem to come from the upper horizons 

 at various points along the coast of Grande Greve. 



Zaphrentis corticata Billings 



Zaphrentis corticata Billings, op. cit. p. 9, pi. i, fig. 4 

 Streptelasma prolific um Billings (?) Lambe. op. cit. p. 1 15 



Original description. Corallum two or three inches in hight, straight, or only slightly 

 curved, expanding to a width of eighteen lines at the hight of two inches. Surface (in some 



