MILLEPORA. 85 



Pontes furcata Lamk. 

 Ycry abundant, in shoal water down to 2 or 3 fathoms. 



Pontes astraeoides Lamk. 



Very abundant. 



Of the numerous species of Porites enumerated by the authors, and 

 particularly by Duchassaing and Michelotti, as belonging to the West 

 Indian fjiuna, I can identify but the three above species as found 

 in Florida. Pontes clavaria and furcata are even rather difficult to dis- 

 tinguish by any constant characters derived from the calicle, as they 

 vary considerably in the same specimen. 



The numerous species described by Duchassaing and Michelotti I 

 have had no opportunity to study. Their genus Neoporites, for the 

 massive species of which P. astrwoides is a type, is a good sul:)genus. 

 The calicle presents sufficient differences, although the pali are not 

 really absent, but are represented by a tooth of the septum concealed 

 by the vertical edge of the latter. 



Oeder ACALEP1I.E. 

 Suborder HYDROID^ Johnst. 



Family MILLEPORIDiE Agassiz. 



MILLEPORA Linn. 



Millepora plicata Esper. 



Millepora alcicornis Linn., Pallas. 



Millepora alcicornis, var. y, plicata Esper., Tab. VIII. 



Millepora complanata? Lamk., Daxa, M.-Edw. & H, Ducir. & Mich. 



Millepora foliataf M.-Edw. & II., Duch. & Micii. 



Millepora faveolata ? Duch. & Mich. 



Millepora striata Duch. & Mich. 



Millepora tuberculata ? Duch. & Mich. 



This species is less common than M. alcicornis. I have found it well 

 developed on the reef only, whilst the other is found everywhere. 

 Characters derived from the calicles or pores are apt to deceive ; still 

 in general, in this species, the larger calicles occupy the centre of a 



