104 NEW INVERTEBRATA FROM 



Santa Barbara, there are more than thirty-six tentacles or 

 sixteen on a similar section of the bell rim. Counting all 

 the tentacular appendages in many specimens there are, 

 on an average, sixteen between each pair of radial tubes. 

 The four tentacles of the radial tubes and those from the 

 bell rim, midway between these, are much larger than the 

 remainder, even in adults. 



The tentacles arise in three series, at different heights on 

 the bell rim. They vary very much in size and number. 

 The largest and longest tentacles are found at the periph- 

 eral ends of the radial chymiferous tubes and arise high 

 up on the outer bell margin. The smaller tentacles are 

 simple clubs with a conspicuous pigment spot. All tenta- 

 cles have bright pigmented eye-spots. 



The larger tentacles are connected with the marginal 

 tube by a small vessel, passing through the substance of 

 the bell to the circular chymiferous vessel. It thus hap- 

 pens that the purple color of the base of the tentacle ap- 

 pears quite a distance from the marginal tube and the 

 tentacular base does not lie directly on the marginal ves- 

 sel as in some genera of hydroid medusae. The tube 

 connecting the cavity of the large tentacle with the mar- 

 ginal vessel extends at right angles to the external wall 

 of the bell. The tentacular bases seem to be placed on 

 the outer bell wall and from them the tentacles extend 

 peripherally outwards. The tentacular bases are thickly 

 colored with dark purple pigment. Each tentacular base 

 has a well-defined pigment spot or ocellus, which seems 

 to be situated high up on the sides of the bell, on account 

 of its basal attachment. 



The tentacles are long, hollow and flexible. They have 

 a reddish color and bear many clumps of nematocysts. 



The smaller or intermediate tentacles, placed on the 

 bell margin between the larger just mentioned, are in- 



