500 
„situated at the extremity of a long 4-cornered proboscis which processed 
„4 bifurcated lips. The free edges of these lips were lined by a row of 
„short, siender, knobbed tentacles which maintained a constant motion. 
„In addition to the principal or terminal mouth there were 8 small tube 
„like, lateral mouths arranged in 4 pairs, the beginnings of the scapulets. 
„These mouths arose from the sides of the manubrium near its base and 
„were interradial in a position (i. e. 90° from the radii of the 4 principal 
„lips), and in addition to these lateral mouths there were 4 pairs of hernia- 
„like projections upon the surface of the manubrium. These projections 
„alternated in position with the already functional lateral mouths, and would 
„no doubt soon have broken through and formed another set of such 
„mouths (fig. 1, pi. 76). The functional mouths were each surrounded 
„by 8 tentacles which were similar in structure to the tentacles lining 
„the free edges of the principal mouth. The medusa was quite transparent 
„except for a trace of brown pigment in the ectoderme of the exumbrella 
„and the dark red pigment of the sense-organs. 1 found it in Charleston 
„Harbour, South Carolina, on September 9. 1898. The resemblance be- 
„tween this young rhizostomous medusa and the adult condition in Se- 
„maeostomeae is very striking.“ 
Aus dieser Beschreibung, in welcher leider das Gastrovascular- 
system nicht naher geschildert wird, ergeben sich zwei wichtige 
Tatsachen: 
1) Die Scapuletten entstehen als selbståndige Gebilde unabhångig 
von den Unterarmen, genau so wie von Claus (1, p. 46—48) bei 
Rhizostoma angegeben. Vergi. auch meine Ausfiihrungen beziiglich 
der Scapuletten-Theorien von Haeckel und Maas (4, p. 17/18). 
2) Die Mundarme werden dichotom angelegt. 
Die vorliegenden 11 Jugendstadien gestatten mir, diese An- 
gaben in einigen wesentlichen Punkten zu erganzen, insbesondere 
in Bezug auf das Gastrovascularsystem des Schirmes. 
Jiingstes Stadium von ca. 6 mm S c h i r m d u r c h m e ss e r 
(Fig. 1—2). Ephyra-åhn- 
lich, Schirm flach, wenig 
gewolbt, mehr scheiben- 
formig, grobgranuliert. 
(Fig. 1). Ocularlappchen 
schmal und spitz, viel 
schmaler als die je zwei 
breiten abgerundeten Ve- 
larlappchen pro Oktant. 
16 Scapuletten, pinsel- 
Schirmdurchmesser. Habitusbild. Seitenansicht. 
