No. 437-] NORTH AMERICAN INVERTEBRA TES. 



oped, but without distinguishable canals, supported by frenulae 

 on the inner perradial corners of the sub-umbrella. Gonads 

 were undeveloped, and no distinguishable gastric filaments were 

 present. 



In color the specimens were light amber being darker on the 

 tentacles. 



As pointed out in the description before cited, the specimens 

 under consideration show many points of difference or contrast 

 as compared with typical Charybdea species. Mayer who has 

 described a similar species from the Tortugas ascribes this to 

 immaturity. This has seemed to me somewhat doubtful, and 

 some hesitancy was entertained as to whether they probably 

 come within the Charybdeidae ; but in the absence of specimens 

 in sufficient numbers or undoubted maturity it seems impossi- 

 ble to more definitely settle the problem. 



Mayer has described two species from the Tortugas, namely, 

 C. aurifera and C. punctata. Both species were based on single 

 specimens and both seemed immature. Hence the same doubt 

 rests upon these as upon the previous species. A comparison 

 of Mayer's figures, Bull. Comp. Zoo/., XXXVII, No. 2, will 

 show many points of similarity and suggests close relationships. 



