MARYLAND GEOLOGICAL SURVEY 447 



Hinde provisionally recognized two species, S. forbesi Milne-Edwards & 

 Haime, and S. sexradiata (Lonsdale), the latter being characterized by 

 possessing a greater development of the third cycle of septa. Gane 

 pointed out that this character was not constant, and merged the two. 

 The Asirangia marylandica (Conrad) is clearly only the young of Sep- 

 tastrea. sexradiata; in every essential character they are identical. Gane 

 has intimated that they may be the same. As the name used by Conrad 

 is the first one that was given to the species I have adopted it. 



The only known specimen of this species from Maryland is in the 

 Philadelphia Academy of Natural Sciences. The type (according to 

 Hinde) is in the museum of King's College, London. 



Occurrence. — St. Mary's Formation. St. Mary's Eiver; Miocene of 

 Bellefield, Yorktown and many points on the James River, Virginia; 

 upper bed at Alum Bluff, Appalachicola Eiver, Florida ; Darlington Dis- 

 trict, South Carolina (as Astrea marylandica, fide Tuomey and Holmes). 



Collections. — Johns Hopkins University, IT. S. Xational Museum, 

 Philadelphia Academy of Natural Sciences. 



PROTOZOA. 



Class RHIZOPODA. 

 Order RADIOLARIA. 

 Suborder PHEODARIA. 



Superfamily PH/EOCYSTINA. 



Family CANNORHAPHIDA. 



The following forms which belong in this family are distinguished 

 from the less highly specialized Eadiolakia which make up by far the 

 larger part of the Tertiary species, by not having a single complete 

 skeleton, but instead an incomplete skeleton composed of many individ- 

 ual and entirely separated pieces which are scattered loosely around 

 in the calymma and never radially arranged. The fossil forms are 

 hence known only from the separate skeletal units and never as indi- 

 viduals. Inasmuch as the fossil species are still living in recent seas the 



