Lorraine Faunas of New York and Quebec 
317 
concentric striae ornamenting the exterior are approximately 
horizontal^ but ventrally from this part of the body, the concentric 
striae become parallel to the lower margin. Anterior to the 
anterior sigmoid ridge, for distances varying from 1.5 mm. to- 
ward the dorsal margin, to 2.5 mm. near the middle, and from 5 
to 6 mm. near the basal margin, the spaces between the con- 
centric striae are crossed by short transverse striae which are 
more closely crowded toward the sigmoid ridge, but become more 
distant anteriorly; over the central parts of the main body the 
ornamentation takes more of the nature of circular or rounded 
hexagonal pits having a quincuncial arrangement. Directly 
below and in front of this quincuncially ornamented area, however, 
within seven-tenths of a millimeter of the ventral and anterior 
margins, only the concentric striae are distinctly indicated. 
Type. Chambly, Richelieu River, collected in 1881 by A. H. 
Foord; No. 8415. The same slab contains also specimens of 
Pholidops suhtruncatus, Hall, and a free cheek of Proetus cham- 
bliensis. A second specimen. No. 8413, from the same locality, 
came from a layer containing an abundance of Plectambonites 
rugosa, Meek, associated with Catazyga headi. A third fragment 
of rock, numbered 2076, contains not only the Technophorus, but 
also Pholidops subtruncatus and Byssonychia radiata. A fourth 
specimen, displaying chiefly the interior characters of the cara- 
pace, shows the perpendicular ridge called the clavicle in the 
preceding description. The accompanying illustrations are not 
adequate for presentation of the characteristics of this species. 
It is probable that all of the species of Conocar dium described 
from Ordovician strata are to be regarded as crustaceans. This is 
true certainly of Conocardium {Pleurorhynchus) antiquum, Owen, 
Conocardium elegantulum, Billings, and Conocardium richmonden- 
sis, Foerste. None of these shells have a true beak or hinge area 
as in lamellibranchiata, and they form a new genus of crustaceans. 
Conocardium immaturum, Billings, probably represents a second 
new genus of crustaceans. 
49. Cryptolithus tessellatus, Green 
In his description of Trinucleus concentricus, Hall states that: 
^^The specimen figured by Green, is one before referred to, as 
coming from the slates of the Hudson-river group, near Water- 
ford, which at that time were regarded as almost non-fossil- 
