40 NEW INVERTEBRATA FROM 



uiiiform dark brown thuouglio lit.' The capitulutn is ovate, 

 fastened to the stem at one pole of an axis passing through 

 the longest diameter which is ordinarily carried upright. 

 The external surface is covered with small warts, in places 

 quite smooth, but there are no elevations to denote the 

 position of the polypides. In confinement the polypides 

 did not readily extend themselves, and the openings through 

 which they protrude were difficult to discover. The wall 

 of the capitulum is tough and translucent, while through 

 it a ramifying system of delicate pink fibers extends. There 

 are also many clusters of small yellow pigment spots in its 

 substance. 



The polypides were studied by a dissection of the capit- 

 ulum. After many trials in which it was impossible to 

 see these bodies extended, longitudinal incisions were made 

 with the scalpel through the outer wall of the capitulum 

 into the interior, Avhere the polypides were found to be re- 

 tracted. They lived for some time after this rough treat- 

 ment of the capitulum. Each of the numerous polypides 

 has an extended, saccular body fastened at one end and 

 extended at the free extremity into a circle of tentacles. 

 The polypides are confined to the capitulum, and in no case 

 were they found expanded in the living animal. 



Each polypide has a white, transparent outer wall, with 

 yellow-brown colored stomach. At the base of the stomach 

 there is seen through the body wall a globular mass. The 

 mouth opening is uncovered and entire. The tentacles 

 which are long, stiU'and non-contractile, are readily moved 



"'The color closely approximates that of the giant kelp, Nereocystes, for which 

 it was at first mistaken. Tlie animal was fouiul attached to the base of one of 

 tliese algiu which rendered tlie likeness even more striking. 



Numerous genera of Bryozoa people tlie Santa Barbara Channel. One of the 

 most interesting of these is an Idmonea (PI. VI, flg. 1) wliich is found in clumps 

 sometimes as large as a man's head, and called by tlie fishermen a "coral." A 

 Salicornaria is abundant all the way from the Bay of San Francisco to San Diego, 



