ORDOVICIAN FAUNAS. 215 
calicularts Nich. These New Jersey specimens, however, are poorly 
preserved, and in none of them is the toothed, distal margin well 
shown. The figures of the species given on plate XVI. are all copied 
from Nicholson, none of the New Jersey specimens being well enough 
preserved for illustration. 
RETEOGRAPTUS GEINITZIANUS Hall. 
Plate XVI., Fig. 18. 
1859. Reteograptus geinitzianus Hall, Pal. N. Y., vol. I1., p. 518, . 
é; fig. 
This imperfectly-understood graptolite possesses a peculiar reticu- 
late skeleton, consisting of three or more rows or series of subquad- 
rangular or hexagonal reticulations, without central axis. No definite. 
thecze have been observed. In the New Jersey collections it is repre- 
sented by a single incomplete specimen from Jutland. 
VERMES. 
ANNELIDA. 
CORNULITES sp. undet. 
Plate XVI., Fig. 1. 
Scattered among the brachiopod shells in the fossiliferous layer of 
the Hudson River slate at Sussex there are occasional specimens of 
a small, tubicolor annelid, which is doubtless a member of the genus 
Cornulites. 'The material is altogether too imperfect, however, for 
specifie identification. 
