MILLEPORA. 85 



Pontes furcata Lamk. 

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



Pontes astreeoides Lamk. 

 Very abundant. 



Of the numei'ous species of Porites enumerated by the authors, and 

 particularly by Duchassaing and Michelotti, as belonging to the West 

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

 in Florida. Porites chvaria 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. astrceoides is a type, is a good subgenus. 

 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 ACALEPII.E. 

 Suborder HYDHOID.E Joiinst. 



Family MILLEPORID.&J Agassiz. 



MILLEPORA Linn. 



Millepora plicata Esper. 



Millepora alcicornis Linn., Pallas. 



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



Millepora complanata ? Lamk., Dana, M.-Edw. & H , Ducii. & Mich. 



Millepora foliata ? .M.-Edw. & II., Dicu. & Mich. 



Millepora faoeolalat Drcii. & Mich. 



Millepora striata Ddch. & Mich. 



Millepora tuberculatat Duch. & Mich. 



This species is less common than M. alcicornis. 1 have found it well 

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

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



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



