TRIBE I. ASTR.EACEA. 269 



The large subangular knobs or lobes covered with compressed 

 cones loosely lamello-radiate, afford a ready character for distinguish- 

 ing this species. At the summits the cones are often a fourth of an 

 inch in breadth, sometimes a little flexuous and quite thin. The 

 general texture of the corallum is very cellular and light. 



Monticularia lobata, Lamk., ii. 392, No. 2. , Deslongchamps, Encyc. 556. 



, Lamour., Exp. Meth. 56. , Blainville, Man. 363. 



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3. MONTICULARIA POLYGONATA. (Lamarck.) 



M. gkmerato-kbata, subramosa. Corallum conulis confertis, compressis, 

 incequalibus ; lamettis serrulatis. 



Glomerato-lobate, subramose. Corallum with the conelets crowded, 

 compressed, unequal ; lamellae serrulate. 



Lamarck states that this species is strikingly different in shape 

 from the preceding. Blainville mentions Japan as the locality. 



Monticularia polygonata, Lamarck, ii. 393, , Deslongchamps, Encyc. 556. 



No. 3. Monticularia polygonalis, Blainville, 363. 



GENUS X. PHYLLASTR^EA. DANA. 



Astraida explanata, foliacece ; polypis sursum spectantibus, prominenti- 

 bus. Coralla striata, viz echinulata, caliculis grandibus lateraliter 

 affixis. 



Explanate Astrseidse, foliaceous; polyps prominent and opening up- 

 ward. Coralla striated, scarcely echinulate ; calicles large and 

 laterally attached to the folia. 



The Phyllastraese are peculiar, among the foliated Astrseidae, in 

 having the polyps attached by one side, to the folia. In other respects 

 they are near the Echinopores, especially the E. aspera. The calicles 

 are quite prominent, and the surface of the corallum is striate, and 



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