COREIGENDA. 



In the description of Fig. 71 omit "(triods)."' 

 177. Lines 12 to 16. Professor Hickson has pointed out to me that in some genera the 



siphonozooids have generative organs. 

 17S. 22nd line from the top. For "Stereosoma Hickson, with" read "Stercosoma 



Hickson, without." 



188. For "Section 2. Paractinia" read "Section 2. Paractiniae." 

 287. Line 2. For "sarcolemina" read "sarcolemma." 



300. Line 8 from bottom. ) 



[For "Bdclloidea" read "Bdelloida." 

 306. Line 4 from top. ) 



323. Line 2 from bottom. For " Pectinobranchiata " read "Pectinibranchiata." 



375. Line 4 from bottom. For " Aspidobranchia " read " Aspidobranchiata." 



411. For "Section 1. Tritonioidea " read "Tribe 1. Tritonioidea." 



413. In description of Fig. 329 for "Eolis" read "Aeolis." 



