148 PALEONTOLOGY OF NEW JERSEY. 



Of the two figures of the only species of this genus, given by the author, 

 the larger one is from an internal cast of a fragment of a Turritella, prob- 

 ably T. vertebroides Morton, and is given as such on our PI. xviii, Fig. 18, 

 natural size; the other specimen can not be found after much search. The 

 specimen was quite small, being only about three-eighths of an inch in 

 length. It probably preserved the substance of the shell, as all the Had- 

 donfield specimens do, and ought not to have been misunderstood by the 

 author of the genus and species. It would appear to have been more 

 related to Vermetus than to Turritella, and I am inclined to think it only the 

 apex of a species of that genus, or perhaps of a Serpula. Still, as the type 

 specimen is lost, I suppose the generic name must stand, for the present at 

 least. 



Laxispira lumbricalis. 



Plate XVIII, Fig. 35. 



Laxispira lumbricalis Gabb: Proc. Acad. Nat. Sci., Phila., 1876, p. 301, PI. xvii. 

 Fig. 7. 



As yet no other specimens of this species have been found than those 

 used by the author in the original description, and of these the larger has 

 proved to be only the internal cast of a Turritella and will be found figured 

 as T. vertebroides on PI. xviii, Fig. 18. The other specimen is lost, conse- 

 quently I can give no description of it from personal examination. I 

 therefore copy below Mr. Grabb's original description: 



Shell with a circular cross section; whorls about as far apart as the diameter 

 of the whorls, three or four in number; surface marked by numerous small, 

 closely placed revolving ribs. 



Mr. Grabb, in his remarks following the above description, refers the 

 large casts doubtfully to the same species as the "small specimen from the 

 Ripley Marls, from Haddonfield, New Jersey," from which the description 

 was made. Mr. Grabb's figure of the small specimen is also copied. It is 

 greatly enlarged from the specimen, which was only about three-eighths of 

 an inch in length, and probably preserved the shell. What the small speci- 

 men may have been I have no means of knowing other than the author's 

 description and remarks, but presume it may have been, the apical portion 

 of a Vermetus or Serpula, 



