SOLMUNDELLA. 75 



nately the oral gastric wall is entire, so that it was very easy to follow out 

 the structure of the pockets on such a large specimen by probing and in- 

 jecting air. The central stomach is flat, the mouth large, wide open, and 

 the lip, if any was present, is torn off. Not wishing to destroy the single 

 specimen of this remarkable species, I was not able to settle definitely the 

 question of presence or absence of canals. Surface views, however, strongly 

 suggest the presence of peronial and festoon canals. There are no traces 

 of the development of sexual products, the gastric wall being uniformly 

 thin over its entire surface. The Medusa is entirely colorless. Apparently, 

 from the entire absence of gonads and the number of gastric pockets, this 

 is an immature stage of some very large species. I refer it provisionally 

 to Aegina on account of the number of tentacles, though it is possible that 

 when the adult is known this generic identification may require revision. 

 The most important feature of the specimen is, of course, the fact that the 

 four gastric pockets though only equal in number to the tentacles are inter- 

 radial in position and alternate with the latter. 



Solmundella Haeckel, 1879. 



sens. em. Maas ( : 04 a , : 04 c ). 



Aeginopsis J. Mueller, '51; Gegenbaur, '56; etc. (non. Brandt, '38). 

 AegineUa and Solmundella Haeckel, '79. 

 Aeginella Mayer, :00 b ; Bigelow, : 04. 



Aegindae with four peroniae, but with only two tentacles ; with eight 

 gastric pouches and without canal system. 



There is, since the studies of Browne (:05 b ) and Maas (: 05), no longer 

 any doubt that Haeckel's ('79) description of a canal system in his genus 

 Aeginella was an error, and that Aeginella and Solmundella are, therefore, 

 synonyms. Since the name Aeginella is already preoccupied for a crustacean 

 genus, a fact which I had overlooked at the time I published my paper (: 04) 

 on the Medusae from the Maldives, it must be abandoned in the present con- 

 nection and the name Solmundella must be retained. This has already been 

 pointed out by Maas, : 04°. 



Of the various species of this genus (Haeckel, '79, enumerates four for 

 his two genera, and Maas, '93, has since added another) probably only two, 

 S. bitentaculata and *S'. mediterranea, are valid. And even these two are so closely 



