1899] MICROSCOPICAL JOURNAL. 107 



3 in .01 mm. at the border, and 5 in .01 mm. at the centre 

 from which they radiate in curved lines. The central de- 

 pression is encircled by from ten to twelve short spines. 

 Processes short and obtuse. Valve .165 mm. Port Antonio, 

 Jamaica. Not common. Distinguished chiefly by the cen- 

 tral spines and by the size of the reticulations, vi^hence 

 the name. It approaches B. Roperiana Grev. Frontis- 

 piece, fig. 6, X 330. 



BiDDULPHIA SEMICIRCULARIS ASBURYANA. — Valve arcu- 

 ate with the ends produced and elevated into rounded 

 processes. Surface not divided by costate lines, convex, 

 punctate, the puncta rounded about 6 in .01 mm. near the 

 hyaline excentric space from which they radiate irregu- 

 larly, increasing in size to about l^n .01 mm. at the mar- 

 gin where they are irregular and occasionally confluent. 

 Valve .181mm Fossil from artesian well in Miocene depos- 

 it at Asbury Park, N. J. at a depth of 40 ft. Not uncom- 

 mon. Quite distinct from Euodia producta Grun. and 

 from B. semicircularis (Br.) in the irregularity of the 

 produced ends, in their elevation into processes, in the 

 size, shape and distribution of the puncta and in the ab- 

 sence of costae. Frontispiece, fig. 3, X 300. 



BiBDULPHiA SHULZEi. — Valve elliptical, slightly raised 

 toward the centre, with a large rounded process-like ele- 

 vation at each end. Surface punctate, the puncta round- 

 ed, 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. Valve .115 mm. In 

 the character of its markings it approaches Tahulina 

 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 



