392 
SUPPLEMENT. 
Genus LITUITES 
[See supra, p. 1.] 
liituites lituus, Montfort. 
[See supra, p. 5.] 
A fragment (No. C. 3394) of the body-chamber of this species has 
just been brought to my notice. It is a cast, but it has some small 
pieces of the test remaining, showing fine and regular transverse 
thread-like lines, of which about five fill the space of 1 line. Part 
of the aperture is preserved and exhibits one of the curious lobes or 
lappets characteristic of the genus. The specimen is 4 inches long ; 
inches in diameter at the aperture, and about 1 inch at the 
posterior extremity. The cast is marked with strong transverse 
undulations, which are very irregularly waved, sometimes arching 
forwards in the direction of the aperture. The undulations vary in 
their distance apart from 1 to 2 lines ; they are crowded together 
near the aperture. 
L. lituiis has lately been figured and described by Dr. Adolf 
Remele in the work above mentioned : — ‘ Untersuchuugen fiber die 
Yerstein. Diluvialgeschiebe des norddeutschen Elachlandes,’ i. Stiick, 
1890, p. 7, Taf. i. ff. 1 a, 1 h. 
Horizon. Oskarskal Group, 4 ( = Pala ?). 
Locality. Sandvigen, Norway. 
Transferred from the Museum of Practical Geology. 
Genus PLEURONAUTILUS. 
[See supra, p. 134.] 
Pleuronautilus trinodosus, Mojsisovics. 
1882. Pleuronautilus trinodosus, Mojsisovics, Die Cephalopoden der 
Mediterranen Triasproviuz (Abhandl. der k.-k. geol. Reichsanst. 
Band x.), p. 274, Taf. Ixxxv. ff. 1 1 5. 
Sp. Char. Shell thick, discoid, consisting of two and a half or 
three slightly embracing whorls, which are subquadrangular in'" 
section, the dorsal side a little broader than the periphery. 
Umbilicus shallow, with steep subangular sides ; about two fifths the 
^ It will be convenient here to supply an omission in my remarks on this 
genus {supra, p. 3), viz., to say that, as here restricted, Lituites is probably 
confined to the Ordovician rocks ; its presence in the Silurian seems very 
doubtful (see supra, p. 8). 
