470 PROCEEDINGS OF THE ACADEMY OF [1898. 



Quite distinct from Euodia produeta Grun. and from B. semicir- 

 cidaris (Br.) in the irregularity of the produced ends, in their eleva- 

 tion into processes, in the size, shape and distribution of the puncta 

 and in the absence of costse. 



Plate XXIV, fig. 3. 



Biddulphia Shulzei n. sp. Bo3'er. 



Valve elliptical, slightly raised toward the centre, with a large 

 rounded process-like elevation at each end. Surface punctate, the 

 puncta rounded, oblong, averaging 5 in .01 mm., but for the most 

 part scattered, leaving numerous hyaline spaces, one of which 

 appears as an indefinite, indistinct transverse band at the base of 

 each process. Owing to the irregularity in the distribution of the 

 puncta the circumference of the valve appears to show a scalloped 

 border. 



L. of V. .115 mm. 



In the character of its markings it approaches Tabulina Testudo 

 Brun. from which it is distinguished by having but two processes 

 and in being without the hyaline lines which cross the valve in the 

 latter. 



Fossil in the artesian well deposit at Weymouth, N. J. I have 

 seen but one specimen which was found by Mr. John A. Shulze who 

 also discovered a variety having two processes at one end and one 

 at the other. 



Plate XXIV, figs. 7, 8. 



There appears to be no special reason why either this form or that 

 known as Tabulina Testudo Brun. should be separated from the 

 genus Biddulphia. The hyaline lines are not always definite even 

 in Tabulina Testudo, while the variety in which but three processes 

 appear clearly indicates an approach toward the type of Biddulphia. 



Explanation of Plate XXIV. 



Fig. 1. Rhabdonema Woolmanianum Boyer, valve view, x 284. 



Fig. la. Rhabdonema Woolraauianum, septum, x 284. 



Fiff. lb. Rhabdonema Woolmanianum, zonal view, x 284. 



Fig. 2. Biddulphia interrupta Boyer. x310. 



Fig. 3. Biddulphia semicircularis Asburyana Boyer. x 300. 



Fig. 4. Biddulphia Keeleyi Boyer. x 300. 



Fig. 5. Biddulphia verrucosa Boyer. x 302. 



Fig. 6. Biddulphia Argus Boyer. x 330. 



Fig. 7. Biddulphia Shulzei Boyer, var. x 475. 



Fig. 8. Biddulphia Shulzei Boyer. x475. 



