304 BROOKS. 



Haeckel himself recognizes four species. L. calcarata of 

 the south coast of New England ; L. cruciata of the Medi- 

 terranean and the Atlantic coast of Europe ; L. ulothrix of 

 the Canary Islands ; and L. salinarum, from salt ditches in the 

 vicinity of Cette in Montpellier, although he says that the 

 difference between these species is so slight that they are 

 scarcely more than local varieties. 



I have examined three well marked varieties or species, each 

 represented by numerous specimens. While each of them 

 seems to be constant they differ so slightly that there seems 

 to be no reason for giving them specific names until their 

 whole life history has been traced. 



1. Figs. 5, 6, and 7 are from a form from Woods Holl, with 

 100 or more large tentacles, and an equal number of accessory 

 tentacles, and marginal clubs. The clubs have no ocelli. This 

 is undoubtedly Lafoea calcarata of A. Agassiz, although he 

 says that the accessory tentacles and clubs are irregularly 

 distributed. 



2. Fig. 4 is from a second form from Woods Holl, differing 

 from the first only in the absence of accessory tentacles. 



3. Figs. I, 2, and 3 are from another form which I found in 

 great abundance at Green Turtle in the Bahamas in May, 1886. 

 The largest specimens were about an inch in diameter, with 

 about fifty or sixty large ocellate tentacles, and an equal 

 number of accessory tentacles, and ocellate marginal clubs. 

 The mouth is quadrate and the lips are simple, and the distal 

 fourth of the radiating canal is not occupied by the gonad. 



Fig. 2 is from a specimen half an inch in diameter, with 

 thirty-two primary tentacles. 



In young specimens there are very few marginal clubs, and 

 the accessory tentacles are distributed irregularly. Fig. 3 is 

 from a specimen about a fourth of an inch in diameter, with 

 only one club and only eight primary tentacles. 



This form is very similar to L. ulothrix of Haeckel, from 

 which it differs only in the distribution of the accessory 

 tentacles and clubs, which is regular in the adult Bahama 

 form, and irregular in L. ulothrix. 



