I3J. CONTRIBUTION TO 



ZAPHRENTIS TRISINUATUS, N. Sp. 



Plate 37. Figs. 5, 6, 7. 



Coralluni simple, turbinate, straight or regularly curved. Acute, or with a 

 broad scar at the base of attachment. Gradually expanding in diameter to the 

 calix. Height varying in different individuals, from seventy-five to one hun- 

 dred millimeters. Calix, funnel shaped, from twenty-five to forty-five millime- 

 ters in diameter. Depih forty-five millimeters. Number of lamelliw, eighty- 

 four in the circumference of a calix, twenty-five millimeters in diameter, une- 

 quel in size, and very sharp at the margin, alternating below, the short ones 

 scarcely more than rudimentary, the longer ones abruptly slope to within two or 

 three millimeters of the center, two, three, or more of them coalescing, and 

 gradually terminate, leaving a depressed convex space in the bottom of the ca- 

 lix, from four to six millimeters in diameter. There are three fossettes, the 

 principal one is situated on the iinterior side of the corallum, and consists of 

 a deep depression, commencing at the margin of the depressed convex space in 

 the bottom of the calix, but gradually disappt^ars a short distance from the 

 bottom, but its continuation is marked by one principal lamelUt continuing to 

 the anterior margin. The two lateral fossettes are situated on the sides at 

 right angles to the principal fof^sette ; neither of these extend to the margin of 

 the calix. 



Found in the Lower Devonian (Corniferoiis group) Falls of the Ohio, Now 

 in trie collection of the anther. 



S T R 1 A T O P R A B E L L I S T R I A T A , N. Sp. 



Plate 37. Vm. 8. 



Striatopora bellistriata see Contuibution to Indiana Paleontology, Part 12, 

 Page 112, Plate xxxtiV, Fig. 12, July 18, 1903, for description and explanation. 



MEGISTOCRINUS RUGOSUS, L. & C, Rowley. 



Plate 38. Figs. 1, 2, 3, 4, 5, 6, 11. 



The fine specimen figured, 1 and 2 differs in some features from Lyon & Cassedy's 

 type, but the differences are of no great importance. The region of the basals 

 and first radials is hardly concave. The column covers most of the basal ring 

 of plates, occupying a hardly perceptible concavity, the uncovered portion of 

 the basal plates appearing as a low ring-like elevation. The columnar canal 

 is quite large and round. P2ach of the first radials is granulose and very 

 slightly concave about the center. The next ring of plates (second radials and 

 first interradials) are (juite convex and rendered very rugose by sharp ridges. 



