BRITISH ZOOPHYTES, 63 



tylidce, from the genus Atradylis, Wright. Atractylis 

 being in use as a botanical generic name must be sup- 

 pressed, and Prof. Allman has, in his " Gymuoblastic 

 Hydroids/' given the name Wrightia to the genus 

 formerly called Atractylis, and has called the family 

 Bimeridce. The Bimeridce of Allman is not, however, 

 coincident with the AtractylidcB of Hincks, as the 

 former excludes the genera Dicoryne, Bongainvillea, 

 and Perigormnus. For the first of these, the species 

 of which possess natatory sporosacs, he has instituted 

 the family Dicorynidce ; the other two he has placed in 

 a family BougainvilUdce, one of the characteristics of 

 which is that the hypostome or proboscis is continuous 

 with the body of the polypite. By adhering to the 

 rule before laid down, of confining the family charac- 

 teristics to the shape of body and shape and disposition 

 of tentacles, the whole of the genera included in the 

 family Atractylidce of Hincks will come within the 

 diagnosis of the family Bimeridce. 



Genus I. Wrightia, All. 



(Named after Dr. T. S. Wright.) 



Coenosarc sheathed in a chitinous polypary. Stems 

 erect, funnel-shaped, developed at intervals on a 

 creeping stolon. Polypites emerging from the summits 

 of the stems, into which they are retractile, fusiform, 

 with single verticil of filiform tentacles. Reproduction 

 by fixed sporosacs borne on the side of the stem, and 

 invested by a chitinous envelope. — T. H. 



1. W. ARENOSA, Aid. 



AtractyHs arenosa {Aid., T. S. W., T.B.). 

 Hab. : Tynemouth, Cullercoats [Aid.), Largo 

 {T. S. W.), Filey Brigg {T. H.) . Stems minute, funnel- 



