ART, 7. NEW CALCAREOUS ALGAE FROM TRINIDAD——-HOWE. ) 
PLATE 2. 
Lithothamnium pennyi M. A. Howe. 
Photograph of a part of a transverse section, through one of the knobs, 
enlarged 100 diameters. 
PLATE 3. 
Lithophyllum trinitense M. A. Howe. 
Fic. 1. Photograph of the single type specimen, natural size, showing the 
superposed laminations of the Lithophyllum, seen especially well in the median 
zone. Above the center, a little at the left, are the remains of a very different 
organism (coral?). Gasparillo quarry, Trinidad, F. W. Penny, No. G. 5, 
station 8297. 
2. Photograph of a vertical section, showing one lamina, its hypothallium, 
conceptacles, ete., enlarged 42 diameters. 
PLATE 4. 
Lithophyllum trinitense M. A. Howe. 
Photograph of a vertical section, showing zonations, perithallia, conceptacles, 
ete., enlarged 100 diameters. 
