GASTEROPODA OF THE LOWER GREEN MARLS. 149 
Formation and locality: From the base of the Lower Marl Beds at 
Haddonfield, New Jersey. 
VERMETID. 
Genus SILIQUARIA Brug. 
SILIQUARIA PAUPERATA, 0. sp. 
Plate xvi, Figs. 26-28. 
A few specimens only of casts of tubes referable to this genus have 
come under my notice. Two of them are coiled and retain the younger 
parts of the specimens, while most of them are only fragments represent- 
ing medium sized parts of the tubes, or parts from the large irregularly 
coiled portions. The tube is very gradually tapering, and either compactly 
or loosely coiled in the upper part; but all show their relations to the genus 
Siliquaria, by the narrow ridge left along the upper side of the tube by the 
material which has filled the slit. There is no distinctive feature repre- 
sented on the specimens by which they can be distinguished from casts of 
other species of the genus; and, as no evidence of the surface characters 
‘are preserved, no data for comparison is left. 
Some of the specimens included under the species are marked on the 
label accompanying them in the cabinet of the Acad. Nat. Sci., Phila., as 
types of Mr. Gabb’s Lavispira lumbricalis, which species is also the type 
of the genus Lavispira. I can not, however, feel satisfied that they were 
ever used by Mr. Gabb as such, nor do I see how he could have con- 
structed the figure given of that species and genus from the specimen in 
question; as there certainly is no evidence of the longitudinal striz there 
represented on the specimen which I have figured on Pl. xvi, and which 
is the best of those on the ecard labeled with that name, and marked 
“types.” 
Formation and locality: Some of the specimens are marked as coming 
from Haddonfield, New Jersey, collected by T. A. Conrad; others were 
associated with specimens without definite locality, but mostly Lower Marl 
fossils. 
