NOTES ON SOME SPECIES OF RETEPORA AND ADEONELLA 63 1 



there exist groups of three to seven zooecia which are distinctly larger 

 than ordinary zooecia and are probably to be regarded as gonoecia (a). 



a. A gono:cium (right) and an ordinary zooecium (left). 

 X50. 



b. Fimbriated median pores of a zooecium. x 150. 



c. Mandible of frontal avicularium. x 150. 



d. Mandible of vicarious avicularium. X150. 



e. Mandible of frontal avicularium (Kagoshima specimen). 



X150. 



f. Mandible of vicarious avicularium (Kagoshima specimen). 

 XI50. 



The zooecia in question have zooecial aperture distinctly transversely 

 elongated and about twice as long as that of ordinary zooecia. Frontal 

 avicularia (c) with triangular mandible which is simply pointed at end 

 without curving ; they are much smaller than vicarious avicularia. 

 Vicarious avicularia (d) are provided with large triangular mandible, 

 being pointed and slightly curved at apex. 



The above type specimen was obtained from off the Misaki Marine 

 Station. Depth unknown. A somewhat smaller specimen, which may 

 be regarded to be specifically identical with the type, is to hand from 

 Kagoshima Gulf. This differs not inconsiderably from the type in 



Fig. 7. 



Fig. 7. Adeonella hexangitlaris , n. sp. 



