14 The Paleontologist. [Sept. 14, 



they vary materially sometimes, notably C. O'Nealli. The case of Ch. quadratus, Romin- 

 ger {Ch, rkpmbicus, Nicholson), on the typical specimens the calices are arranged in beau- 

 tifully curved lines like the lathe work on watch cases, whilst on some other specimens 

 they are very irregular, like some entirely different species, and might be taken for 

 another but for the very peculiar and unmistakable internal structure. 



The writer attempted to describe a new species of Constallaria from the depressed stars 

 variety, but after selecting from and comparing with a great number of specimens, and 

 finding they shaded off from one to the other without any decided or positive line of dif- 

 ference, he gave it up. 



It seems hardly possible, with the material so far collected and known, to make out 

 more than the one decided species, viz., C. antheloidea. Hall, of this coral; not even a con- 

 stant variety. 



The best locality for C. aniheloidca is at Cincinnati, in the city limits, in what is gener- 

 erally considered the middle beds of the Cincinnati Group. In the upper beds in Ohio 

 and Indiana it is rarely found. I have, however, some fine specimens from those localities. 



U. P. J. 



A STRANGE FOSS[L. 



About a year ago I found in the friable blue shale at Cincinnati, what may be only an 

 appendage of an unknown animal form, yet it is so peculiar as to seem worthy of notice. 



It has a bright, glossy, corneous appearance and like hard enamel. In shape it is like a 

 miniature /'(7W, with a long tusk-like projection at the front end standing nearly at a right 

 angle, slightly curved and sloping a little backward with a shoulder-like offset just back 

 of the junction or angle. There are 5 comparatively long curved teeth or barbs sloping 

 backward, like the barbs of fish hooks, in the jaw, two of them broken but the others 

 seem to be entire; they are about 2^ the length of the tusk. The length of the jaw is 

 about l^ lines and y'^ or Jj of a line wide, except at the shoulder, where it is nearly 

 twice as wide. The tusk is about i line in length and a little more than half the thick- 

 ness ot the jaw at the narrowest part; the barbs still less. The jaw is of a rather dark, 

 smoky color, the tusks and barbs lighter. 



This may have been an appendage of an annelid, but it is who'ly unlike Prof. Grinncll's 

 figures and description of Neridavus varians. U. P. J. 



EEMARKS OJs" HELOPOEA DENDKINA, (James.) 



In October, 1875, ^^^ writer described a new species of Fossil Palyzoon from the Lower 

 Silurian Rocks at Cincinnati — Ptilodictya {?) (provisionally) dendrina ; afterwards changed 

 before publication to the Genus Helopora (Helopora dendrina), which was read with 

 others, before the Cincinnati Society of Natural History, August meeting, 1876, and after- 

 wards arranged to be figured and published in the first number of the Journal of the 

 Society, but other matter found a place there to the exclusion of my species. 



The description of Helopora dendrina was published in the first number of this paper, 

 July 2, 1878 Another description of, apparently, the same species was published, with 

 figures, in S. A. Miller and C B. Dyer's Contributions to Paleontology, No. 2, July 22, 

 1878. The figure (pi. 4, fig. 6) resembles, very closely, the specimen from which I made 

 the description. They (M. & D.) have named it Bythofora friiticosa. This name {frutieosa) 

 falls into a synonym, of course. 



I claim nothing on the ground of the reading, but the fWst publication establishes the 

 species. 



