258 



Length of the specimen, imperfect at both ends, 5 inches ; dorso-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. 



Locality 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 remarkable 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, prosd- 

 sionally : 



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

 umbilicus ; aperture 3 inches wide and 2^^ inches ni 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- 

 sion L, at Point Rich. 



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

 two central whorls of a strongly annulated species. Diameter IG 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 hues. 

 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 sida. 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 vcntr?! 

 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 1^ 

 lines in thickness. 



