258 



Length of the specimen, imperfect at both ends, 5 inches ; clorso-ventral 

 diameter, at the larger extremity 15 lines ; lateral diameter, 13 lines ; 

 dorso-ventral diameter, at 4 inches from the larger extremity, 11 lines ; 

 the rate of tapering being thus about 1 line to the inch ; septa about 4 

 lines distant from each other. 



Localitij and Formation. — H, Schooner Island in Pistolet Bay, New- 

 foundland ; Quebec group. 



Collector. — J. Richardson. 



Other Species of Cephalopoda. 



At all the localities, from Division F, upwards, fragments of undeter- 

 mined orthoceratites occur, many of which will, no doubt, turn out to be 

 undescribed. It is remai-kable that no species of Cyrtoceras has been 

 collected in these rocks in Newfoundland, while they abound at Point 

 Levis. Of other genera I propose to name the following species, provi- 

 sionally : 



1. Nautilus insolefis. — About 6 inches across ; whorls all seen in the 

 umbilicus ; aperture 3 inches wide and 2^^ inches m the dorso-ventral 

 diameter ; siphuncle apparently near the centre, 3 lines in diameter con- 

 sisting of segments, which are constructed or shaped like a dice-box. The 

 septa have not been distinctly observed, but judging from the length of the 

 segments of the siphuncle they appear to be 3 or 4 lines apart. The sec- 

 tion is broadly elliptical, flattened along the ventral aspect, rounded at the 

 sides. The specimens are all more or less distorted. It occurs in Divi- 

 sioQ L, at Point Rich. 



2. Nautilus desertus. — The specimen is a fragment, consisting of the 

 two central whorls of a strongly amiulated species. Diameter 16 lines ; 

 dorso-ventral diameter of the last whorl, where broken off, 6 lines ; lateral 

 diameter 9 lines ; distance of the annulations from each other 3 hnes. 

 The whorls envelope each other to the depth of cne-sixth the dorso-ventral 

 diameter ; they are moderately convex on the ventral aspect and narrowly 

 rounded on the side. It occurs in Division L, Point Rich. 



3. Nautilus calciferus. — Whorls slender, compactly inrolled, the outer 

 a little impressed by the inner ; septa twelve to the inch on the ventr?! 

 aspect, where the diameter of the coil is three inches ; siphuncle small, 

 close to the shell in the median line of the ventral aspect. 



A specimen 3 inches across, consisting of about 3 whorls, has the last 

 whorl 13 lines in the dorso-ventral diameter, and the siphuncle about li 

 lines in thickness. 



