16 



Gemmer Æg og Embryoner, i de mandlige Spermatozoider. 

 Hos de iagttagne kvindelige Gemmer (Fig. 5—7) vare 

 Æggene allerede udviklede til Embryoner af en kort oval 

 lidt fladtrykt Form (Planula Dalyell) og opak bleg rosenrød 

 Farve (Fig. 8). Efter den forskjellige Størrelse og Ud- 

 vikling af disse Gemmer fandtes i hver af dem fra 1 indtil 

 10 Embryoner (Fig. 5—7), hvilke hyppig ved deres tilta- 

 gende Væxt skyde Maven til den ene Side af Kappens 

 indre Væg (Fig. 5, 6). 



De mandlige Gemmer ere i udviklet Tilstand opak- 

 gulhvide af Sperma, som udfylder Hulrummet mellem 

 Kappen og Maven (Fig. 10, 11 yngre, Fig. 12, 13 ældre 

 mandlige Gemmer, hvorMaven skjules af den opake Sperma). 

 Spermatozoiderne, som have en zittrende Bevægelse, ere 

 rundagtig — ovale med lang haarformig Hale. — 



Ingensomhelst selvstændig Bevægelse bemærkedes 

 iøvrigt hos nogen af de beskrevne Medusegemmer. 



De ovenbeskrevne 4 til Slægten Corymorpha hørende 

 Arter kunne diagnoseres saaledes: 



a. Corymorpha nutans, Sars. 



Proles hydriformis 3 — 4 pollicaris, tentaculis inferiori- 

 bus filiformibus longissimis uniserialibus 40—50, superiori- 

 bus brevissimis numerosissimis sparsis; pedunculis gem- 

 migeris circiter 15— -20, tenuibus, longiusculis, ramosis, 

 ramulis alternantibus apice gemmis medusinis numerosis 

 minimis dense accumulatis obsitis. 



Proles medusiformis decidua, pallio campanulato apice 

 conico, canales qvatuor radiantes exhibente, antice aperto 

 margine obliqve truncato ibiqve bulbis qvatuor margina- 

 libus æqvidi stantibus ornato, qvorum unus solummodo in 

 cirrum cylindricum porre ctum evolvitur. 



b. Corymorpha Sarsii, Steenstrup. 



Proles hydriformis % — 3-|policaris, tentaculis inferiori- 

 bus nliformibus longissimis uniserialibus 30 — 40, superiori- 

 bus numerosissimis brevissimis sparsis; pedunculis gem- 

 migeris 8 — 24, tenuissimis, breviusculis, apice divisis, gem- 

 mis medusinis paucis maximis obsitis. 



Proles medusiformis decidua, pallio elongato-campa- 

 nulato apice rotundato, canales qvatuor radiantes exhi- 

 bente, antice aperto, margine recto ibiqve bulbis seu cirris 

 marginalibus enascentibus qvatuor æqvidistantibus, omni- 

 bus æqvalibus, ornato. 



c. Corymorpha annulicomis, Sars. 



Proles hydriformis § pollicaris, tentaculis inferioribus 

 nliformibus longioribus annulosis 20, superioribus 8 — 10 

 uniserialibus brevissimis apice globoso; pedunculis gem- 

 migeris brevissimis, gemmis medusinis majoribus et pau- 

 cioribus obsitis. 



and in this cavity the sexual matter is formed: in the 

 female gonozooids, ova and embryos; in the males, sperma- 

 tozooids. In the female gonozooids observed (fig. 5 — 7) 

 the eggs were already developed to embryos of a short- 

 oval slightly flattened form (Planula Dalyell) and opaque 

 pale roseate color (fig. 8). According to the different 

 size and development of these gonozooids, there were 

 found in each of them from 1 — 10 embryos (fig. 5—7) 

 which frequently by their increasing growth push the 

 manubrium against one side of the interior wall of the 

 umbrella (fig. 5, 6). 



The male gonozooids are in the developed state 

 opaque-yellowish white from the sperm which fills the 

 cavity between the umbrella and the manubrium (fig. 10, 

 11 younger, ß.g. 12, 13 older male gonozooids, in which 

 the manubrium is hidden by the opaque sperm). The 

 spermatozooids, which have a vibratory movement, are 

 roundish-oval with a long hair-like tail. 



No independent movement whatever could be obser- 

 ved in any of the gonozooids of this species here des- 

 cribed. 



The above-described 4 species belonging to the genus 

 Corymorpha are diagnosticated as follows: 



a. Corymorpha nutans, Sars. 



Proles hydriformis 3 — 4 pollicaris, tentaculis inferiori- 

 bus filiformibus longissimis uniserialibus 40 — 50 superiori- 

 bus brevissimis numerosissimis sparsis; pedunculis gem- 

 migeris circiter 15 — 20, tenuibus, longiusculis, ramosis, 

 ramulis alternantibus apice gemmis medusinis numerosis 

 minimis dense accumulatis obsitis. 



Proles medusiformis decidua, pallio campanulato apice 

 conico, canales quatuor radiantes exhibente, antice aperto, 

 margine oblique truncato ibique bulbis quatuor marginali- 

 bus æquidistantibus ornato, quorum unus solummodo in 

 cirrum cylindricum porrectum evolvitur. 



b. Corymorpha Sarsii, Steenstrup. 



Proles hydriformis 2 — 3^ pollicaris, tentaculis inferi- 

 oribus filiformibus longissimis uniserialibus 30 — 40 supe- 

 rioribus numerosissimis brevissimis sparsis; pedunculis 

 gemmigeris 8 — 24 tenuissimis, breviusculis, apice divisis, 

 gemmis medusinis paucis maximis obsitis. 



Proles medusiformis decidua, pallio elongato- campa- 

 nulato apice rotundato, canales quatuor radiantes exhi- 

 bente, antice aperto, margine recto ibique bulbis seu 

 cirris marginalibus enascentibus quatuor æquidistantibus 

 omnibus æqualibus ornato. 



c. Corymorpha annulicornis, Sars. 



Proles hydriformis f pollicaris, tentaculis inferioribus 

 filiformibus longioribus annulosis 20, superioribus 8-10 

 uniserialibus brevissimis apice globoso; pedunculis gem- 

 migeris brevissimis gemmis medusinis majoribus et pau- 

 cioribus obsitis. 



