Clark. — New Blastoids and Brachiopods 



PLATE 1. 

 (All the specimens figured are in the Museum of Comparative Zoology). 



Penlremites saxiomontanus Clark. 



Fig. 1-3 are three views of the type, M. C. Z. 1001, from Squaw Creek, Mon- 

 tana. X -J. 



Fig. 4-6 are similar views of a less well-preserved specimen from the Quad- 

 rant limestone at Old Baldy, Montana. X ^. 



Penlremites divergens Clark. 



Fig. 7-10 are three views of the type M. C. Z. 1002. P'ig. 7 shows very clearly 



that the specimen is thickest at the base of the ambulacra. One side is 



unfortunately damaged. 

 Fig. 10 is a single view of a smaller specimen, also incomplete, and shows the 



sutures between a deltoid and two adjacent ambulacral plates. X -j. 



From the Quadrant limestone at Old Baldy, Montana. 



Penlremites altiniarginalus Clark. 



Fig. 11-13. Three views of the type, \l. C. Z. 1003, which is very well pre- 

 served though fragile. X f • From the Quadrant limestone at Old 

 Baldy, Montana. 

 Fig. 14. A fragment of Quadrant limestone from Old Baldy, Montana. It 

 contains 



Center, Penlremites saxiomontanus Clark. 



Right, Penlremites altimarginalus Clark. 



Left-center, Hustedia mormoni Marcou. 



Top, Sjnriferina kentuckiensis Shumard. X ^. i 



Schizoblastus haijnesi Clark. 



Fig. 15-17. Three views (including basal) of a small rather poorly preserved 



specimen. X 4. 

 Fig. 18-20. Three similar views of the type M. C. Z. 1004. X 4. 



Both from the Madison limestone. Squaw Creek, Montana. 



