1903.] MEDUSA FROM BRITISH COLUMBIA AND ALASKA. 189 



course are numerous irregular masses or enlargements, which may- 

 be gonad masses ; preservation is not sufficiently good to make 

 certain of this. They are a bright orange-yellow in colour, and 

 become more numerous on the upper part of the radial canals 

 towards the apex of the bell. The four short tentacles are 

 thick and tightly contracted up to their small rounded tentacle- 

 bulbs. 



Colour. — Radial canals, and the masses along their course, 

 bright orange-yellow. Proboscis, tentacles, and tentacle- bulbs 

 yellowish brown. 



Habitat. —'tit. Paul's Island, Pribyloff Islands, collected by 

 Kincaid. 



D. SIPHONOPHORA. 



I. MoNOPnYiD^ Claus. 



MuGGiiEA Bausch. 



1. MUGGI^A KOCHII Chun. 



Synonym Diphyes chaimissonis Huxley. 



Specific description. — The single specimen obtained is nearer 

 3£. kochii than any other Monophyid, although not agreeing with 

 Chun's description in all respects. Only one nectocalyx is present 

 and there is no sign of another being detached. It is more 

 pointed at the apex, and the oil reservoir is larger in proportion 

 than those of M. kochii. The wings of the nectocalyx are almost 

 smooth, except that portion below the hydroecium which is wavy 

 in outline. The contracted condition of the hydi^osoma will not 

 warrant a more definite determination. 



Habitat. — Puget Sound, collected by Shearer. 



Discussion. — Muggicea kochii is of great interest, as it was 

 from the study of this form that Chun (9) found the interesting 

 life-history of the Monophyids to consist of three generations, in 

 this case of M. kochii, Eudoxia eschscholtzii, and Monoj^hyes 

 prhnordifdis. 



Chun's statement (9) that the nectocalyx of Muggicea is 

 very similar to the anterior swimming-bell of Diphyes and 

 Diphyopsis is confirmed in this case. The position and shape of 

 the parts correspond almost precisely with Mayer's figure (28) 

 of Diphyes bipartita, sp. nov. (fig. 114). 



In this connection it may be noted that Fewkes (13, p. 834) 

 in a footnote records that " specimens of a Dipihyes (?) with but 

 one nectocalyx are very common in the Bermudas and Tortugas." 

 Mayer also says he found a Diphyopsis which has no posterior 

 swimming-bell, and suggests the possibility that " no such 

 structure exists." May not both these species be Muggicea ? 

 The specimen above described differs from Ilaeckel's (19) 



