MARYLAND GEOLOGICAL SURVEY 421 



SCHIZOPORELLA LATISINUATA n. Sp. 



Plate CXIV, Figs. 2, 3, 4. 



Description. — Zoarium forming thin parasitic expansions over foreign 

 bodies. Zocecia sharply distinguished from each other, rather irregularly 

 arranged, often subrhomboidal, four or five in 2.0 mm. ; surface coarsely 

 punctate. Orifice terminal, directed somewhat obliquely forward, sub- 

 circular, broadly sinuate proximally, enclosed by a slightly elevated peri- 

 stome. Avicularia rather small, prominent, one on either or both sides 

 of the orifice, rarely wanting, situated close to the peristome; apparently 

 not divided by a sej)tum. Ovicells not observed. 



The species, with its broad and very sluillow oral sinus, scarcely gives 

 one the impression of a true Schizoporella, but as the sinus is unusually 

 wide also in our specimens of S. unicornis var. tetragona and in S. dover- 

 ensis, and the other characters are very similar to several typical species 

 of the genus, we deemed it preferable to name it as above rather than 

 to place it under Lepralia. 



Occurrence. — Ciioptank Formation. Jones Wharf. 



Collection. — Maryland Geological Survey. 



SCIIIZOPORELLA DOVERENSIS n. Sp. 



Plate CXVII, Fig. 1. 



Description. — Zoarium a thin sheet on foreign bodies, the figured 

 specimen growing on the reverse of Retepora dovcrensis. Zocecia well 

 distinguished from each other but with the surface rather flat; irregularly 

 arranged, though their elongate form gives some prominence to the longi- 

 tudinal rows; average length 0.6 mm., width 0.35 to 0.40 mm. Orifice 

 terminal, slightly transverse, broadly notched on the proximal side, on the 

 whole nearly circular. Surface reticulate, only slightly convex, the cen- 

 tral portion appearing flattened. Avicularia of moderate size, usually 

 one to each zooecium, situated close to either side of the orifice. Ovi- 

 cells not observed. 



Occurrence. — Choptank Formation. Dover Bridge. 

 Collection. — Maryland Geological Survey. 



