CIOiNISTES RETICULATA. 309 



CIONISTES, StreiMll JFright. 



Name. — Froni kImv, a ])illar, probably in allusion to the presence of blastostyles. 



TROPHOSOME. — Hydrophtton consisting of a retiform iiydeoehiza without 

 develo])e(l iivdrocaulus. Hydranths sessile on the liydrorhiza, minute, with a single 

 verticilfof hliform tentacles. 



GONOSOME. — Spouosacs borne by blastostyles, which spring from the 

 liydrorhiza. 



Cioiiistes is a genus constituted by Dr. Strethill Wright for a liydroid of which he met 

 with\i single specimen (male) in the Firth of Forth. It appears to be distinguished from 

 Heterocordtjle chiefly by the absence of a developed hydrocaulus. 



CiONiSTES RETICULATA, StrefliUl Wright. 



CioNisTEs RETrcuLATA, — Sirethill Wright, in Ann. Nat. Hist, for August, 1861. Hincks, 



Brit. Hydr. Zooph., p. 135. 



TROPHOSOME. — HYDrvOnuizA " consisting of a close network of flattened tubes," 

 from which the hydranths and blastostyles " spring at distant intervals." Hyduanths 

 " minute, white, with a single row of short tentacles." 



GONOSOME. — Blastostyles gradually enlarging from the base to the summit ; 

 SPOUOSACS numerous, borne on the sides of the blastostyle. 



liahUat. — " Growing on an old shell." 

 Zoc«/«7y.— Granton, Firth of Forth, Dr. S. AVright. 



I have never seen this hydroid, which, judging from Dr. Wright's short description of it — 

 scarcely fidl enough, however, for a complete diagnosis — must be a form of considerable interest. 

 The only illustration which accompanies the description is a diagramatic outline of one of the 

 blastostyles, with a male gonophorc attached to it. 



