3 2 4 CRETACEOUS PALEONTOLOGY. 



mens which have been so identified do not entirely agree 

 with Gabb & Horn's original illustration. There seem to be no 

 other specimens in the New Jersey collections, however, which 

 can be referred to this species, and it is entirely possible that the 

 differences between our specimens and the one used for illustra- 

 tion by Gabb & Horn is due to their more worn condition. 

 Formation and locality. Vincentown limesand, Vincentowii 



(154). 

 Geographic distribution. New Jersey. 



Genus SPIROPORA Lamark. 



Spiropora calamus Gabb & Horn. 

 Plate XXII., Fig. 10. 



1862. Spiropora calamus G. & H., Jour. Acad. Nat. Sci. Phil., 



2d sen, vol. 5, p. 166, pi. 21, fig. 55. 

 1864. Spiropora calamus Meek, Check List Inv. Foss N. A., 



Cret. and Jur., p. 4. 

 1868. Spiropora calamus Con., Cook's Geol. N. J., p. 723. 



Description. Zoarium small, consisting of cylindrical 

 branches. Zocecia in annular rows of about eight each, the 

 apertures circular, their diameter about one-fourth the distance 

 between the successive annular rows, in the area between the 

 apertures the zocecia are bounded laterally by prominent, longi- 

 tudinal ribs. 



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

 collections. It was established upon a single specimen which 

 seems to have been lost or destroyed, but if the original descrip- 

 tion and illustration are accurate the species is so distinct from 

 any of its associates that there should be no difficulty in recog- 

 nizing it should it be met with in the future. 



Formation and locality. Vincentown limesand, Timber 

 Creek (Gabb and Horn). 



Geographic distribution. New Jersey. 



