OPERCULARELLA LACERATA. 61 



prolongations of the receptacle are directed to 

 a central point, and, closing over the polypite, 

 form a conical roof. Capsules not present. 

 Rare. (See Fig. 9.) 



Opercularella lacerata, Johnston. 



1 specimen in liquid, on a Polyzoan. 



SPECIMEN An extremely delicate species, and 

 28. one very readily overlooked. In 

 the present specimen, it is found running up 

 the stem and branches of a polyzoan, 

 Anguinella palmata, Van Beneden, from which, 

 with great care, it could be removed. It gives 

 off ringed undulatory stems with short ringed 

 side shoots, bearing ovate receptacles. These 

 are produced beyond the rim, with points, 

 which meet conically over the aperture, 

 forming a lid. The polypite is long and linear, 

 and when expanded extends fully the length 

 of the receptacle beyond it. The mouth is 

 slightly conical, and the tentacles are long 

 and number about sixteen. Capsules not 

 present. 



This species bears a very close resem- 

 blance, in many respects, to Calycella syringa, 



Linn. 



Found near low water. 



