EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA I I 5 



the Kine's road about the horizon of Loc^an's division 6 and also at the 

 Grande Cavee. 



Poleumita princessa Billings (sp.) 



Plate 16, figures g, lo 



PI e u ro t o m a r i a princessa Billings. Palaeozoic Fossils, p. 59, fig. 29 



JJfscriptio/i.— 'Vhe only specimen of tiiis species collected consists of tlie two last 

 whorls. From these it would appear that tlie apical angle is about 80°. Tiie transverse 

 section of the whorls is nearly circular. On the upper margin of the whorls, next the 

 suture, there is a band which is about two and one half lines wide at the a])erture 

 and becomes gradually narrower above. At its outer edge there is a narrow sharply 

 elevated keel which may represent the resi)iratory band. Where it terminates there is a 

 small notch in the lip. The remainder of the surface is ornamented by a number of spiral 

 ridges, each less than half a line in width, and about a line distant from each other. As 

 the whorls increase in size, new ridges are intercalated between the old. These are crossed 

 by fine, sublamellose, vertical striae, four or five in the width of one line. In crossing the 

 ridges the striae are all curved backwards. 



The umbilicus, in this specimen, is concealed, and must be, judging from the form of 

 the basal whorls, very small. The form of the ape.x is not clearly indicated, but it appears 

 to have been much depressed, or nearly flat, as represented in the figure. It may be that 

 this appearance is due to pressure, or the absence of the apical whorl. 



Locality and Formation. — Between Cape Gaspe and Cape Rosier. 



We have not found this species but present herewith new figures of the 

 oriorinal. 



&' 



Platyceras cf. unguiforme Hall 



See Platyceras unguiforme Hall. Palaeontology of New York. 1859. 

 3 :3i9, Pl- 58, fig. 7 



Some small deeply furrov/ed forms of Platyceras present rather close 

 similarity to this species from the New Scotland beds of New York. 



Locality. From the Quay, on Cape Rosier Cove ; Logan's division 4. 



Modiomorpha varia Billings (sp.) 



Pl.-ite 22, figures 1-3 



M o d i o 1 o p s i s varia Billings. Palaeozoic Fossils, p. 56, not figured 



Description. — .Sub-ovate, obliquely depressed convex from the umbones to the poste- 

 rior part of the ventral margin, or to the lower part of the anterior margin. In the greater 

 number of the specimens an obscure depression extends from the umbones to the ventral 

 margin, causing a faint sinus about the middle, or a little in front thereof ; umbones about 

 one sixth or one fifth the length from the anterior extremity ; beaks small and apparently 

 incurved. Dorsal margin more or less elevated and compressed, nearly straight to a point a 

 little behind the mid-length ; then passing with a rounded or sub-angular curve into the 

 anterior margin. Ventral margin gently convex, often nearly straight or slightly sinuateda 

 little in front of the middle ; somewhat abruptly curved up to the anterior angle, more 

 broadly rounded, often obliquely truncated in the upper half or two thirds. 



Surface with obscure concentric rings of growth, from half to two lines wide. 

 These are also covered with very fine obscure concentric lines. 



