7o6 CRETACEOUS PALEONTOLOGY. 



1905. Siliquaria pauperata Johns., Proc. Acad. Nat. Sci. Phil. 

 (1905), p. 21. 



Description. — "A few specimens only of casts of tubes refer- 

 able tO' this ^enus 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 representing medium sized parts 

 of the tubes, or parts from the large irregularly coiled portioris. 

 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 represented on the specimens by which 

 they can be distinguished from casts of other species of the genus; 

 and, as noi evidence of the surface characters are preserved, no 

 data for comparison is left." (Whitfield.) 



Remarks.- — This species has not been met with in the recent 

 collections of the Survey, but the lithologic characters of the 

 type indicate that their proper horizon is the Navesink marl. 



Formation and locality. — Navesink marl. New Jersey (Whit- 

 field). 



Geographic distribution. — New Jersey. 



Genus Laxispira Gabb. 



Laxispira lumbricalis Gabb. 



Plate IvXXXL, Figs. 1-2. 



1876. Laxispira himhricaUs Gabb, Proc. Acad. Nat. Sci. Phil. 



(1876), p. 301. 

 1883. Lavispira Iwnhricalis Tryon, Struct, and System. 



Conch., vol. 2, p. 309, pi. 79, fig. 14. 

 1892. Laxispira lumbricalis Whitf., Pal. N. J., vol. 2 (Monog. 



U. S. G. S., vol. 18), p. 148, pi. 18, fig. 25. 

 1905. Laxispira lumbricalis Johns., Proc. Acad. Nat. Sci. Phil. 



(1905), p. 22. 



