NO. 1193. SOME NEOCENE COEALS—GANE. 193 



colony. Yalleys rather wide, long and deej), having perfect communi- 

 cation between them. Corallines broad and furrowed. Wall thin. 

 Epitheca well developed, pellicular; its lines of growth in wavy ridges 

 of varied thickness, the thinnest of which are pierced by the granules 

 of the cost*; in some cases it is limited to the lower part of the base, 

 in others it reaches to the summit of the outer wall of the colony. 

 Costte of nearly equal size, the oldest only reaching the pedicle; con- 

 siderably exsert, being a continuation of the septa at their upper 

 edges; finely toothed on the free edge, rows of granules on the sides. 

 Exotheca abundant. Septa quite exsert, slightly thicker at the wall, 

 granulated laterally in radiating rows, with free edge regularly toothed, 

 the teeth being somewhat larger near the paliform lobe, which is some- 

 what thicker, at least near the columella, than the principal septum to 

 which it belongs. Columella well developed, narrow, of a coarse 

 spongy nature, especially when seen in vertical section. Endothcca 

 abundant, with dissepiments of unequal length inclined toward the 

 inner and lower edges of the septa. 



Pourtales' considered that all the living West Indian types of this 

 genus represented one species, the Manicina areolata (Linnaeus). 

 Whether this be true or not, the species under discussion differs from 

 all recorded living forms. More especially it varies from Manicina 

 areolata in the following particulars : Its collines are generally broader; 

 the septo-costtc of adjoining individuals are rarely united, the walls of 

 the individuals being distinct ; septa somewhat stouter and less crowded 

 together, in very rare cases only exceeding eleven in number to the 

 centimeter; the teeth on the inner edge of the septa are more regular 

 in size and shape. On the other hand, in Manicina areolata the col- 

 lines are narrow, with many of the septo-costse of neighboring indi- 

 viduals united. The septa are thinner and more crowded, from fifteen 

 to twenty (Quelch) to the centimeter. The teeth on the inner edge 

 vary more in different parts of the same septum. This differentiation 

 of the teeth on different parts of the edge of the septum and paliform 

 lobe, as shown by the living types, is well illustrated in the "Eeport on 

 the Florida Eeefs" by Agassiz.^ 



Dimensions. — This species is very variable in size and shape. The 

 greatest width of one corallum measured is 100 mm.; length, 150 mm. 

 (estimated); height, 80 mm.; of another, width, 55 mm.; length, 135 

 mm.; height, 55 mm. 



Geological horizon. — Pliocene. 



Locality. — Caloosahatchie Elver, Florida. 



Collections. — U, S. JSTational Museum (type), collected by Mr. W. H. 

 Dall; Wagner Free Institute of Science, collected by Messrs. Heilprin 

 and Willcox. 



1111. Cat. Mns. Coinp. Zool., Harvard Coll., No. IV, pp. 72, 73. 

 Memoir Mus. Coaip. Zool., Harvard Coll., VII, No. 1, pi. vi, fig. 6. 



Proc. N. M. vol. xxii 13 



