PLATE CXXIII. 
PAGE 
Figs. 1-4. ASTRHELIA PAI.MATA (GolclfuSS) 439 
1. The most normal specimen in the collection. The other specimens 
from the same locality show considerable fusion of the branches. 
David Kerr's place, Talbot County, Maryland. Length 114 mm. 
2. Palmate specimen. Choptank River. % to i-j mile below Parker's 
Landing. Length 115 mm. 
3. Specimen with coalescing branches. Patuxent Cliffs, St. Mary's 
County. Greatest length 69 mm. 
4. Young specimen. Plum Point. Greatest horizontal measurement 
44 mm. 
All four specimens in the U. S. National Museum. 
115 
