564 Verrill, N'otes on Radiata. 



portion are found in all three, or throughout the whole extent of this 

 great province. Future explorations will, undoubtedly reduce the 

 number of species peculiar to each subdivision, as most of the late 

 collections have done, for there can be no doubt but that part of the 

 api^arent differences in the faunae are due to the incompleteness of the 

 collections. Local peculiarities of the particular places at which the 

 various collections have been made have also undoubtedly increased 

 the apparent ditterences. 



As the list now stands, there are known from the Mexican subdivi- 

 sion 42 species; of these, 20 species are peculiar to the region ; 16 are 

 found' also in the Panamian subdivision ; and 6 are found in both these 

 and the Equadorian regions, ranging to Zorritos. 



From the Panamian subdivision there are 80 species known; of 

 these, 51 are peculiar to it (including 16 of Actinaria) ; 16 are found 

 also in the Mexican district ; 7 are common to the Panamian and 

 Equadorian regions; and 6 range through the three sub-provinces. 



Of the Equadorian polyp-fauna we know but 17 species; of these 4 

 are peculiar to it ; 7 are found also in the Panamian ; and 6 extend 

 through both the Panamian and Mexican regions, even to the Gulf of 

 California. 



For convenience of reference some local lists are added, which will 

 at least serve to illustrate the most common and conspicuous species 

 of the several localities. 



List of species collected at Guaymas by Dr. E. Palmer. 



The following species are in the collection of the Chicago Academy 

 of Sciences: 



Leptogorgia Agassizii Y. Psammogorgia teres V. 



L. media V. Astrangia Pedersenii V. 



X. alba V. A. ( Coenangia) conferta V. 



i. labiata V. Porites Calif ornica V. 

 X. exigua V. 



List of species collected near La Paz by Capt. J. Pedersen. 



Leptogorgia Agassizii V. Coimnon.Lugorgia nobilis, var. excelsa V. 

 L. media V. Not common. Common. 



L.pidchra V. Common. E. multijida V. Rare. 



var. exilis V. Common. E. atirantiaca V. Common. 



L. tenuis V. Very rare. Muricea austera V. Not common. 



L. rigida V. Abundant. M. appressa V. Common. 



