udviklede) vare simpelt ovale uden Aabning paa Kappens 

 forreste Ende og uden Spor af Knuder. 



Af de her anførte Iagttagelser, hvilke ganske stemme 

 overens med mine tidligere i Aaret 1835 publicerede, 

 synes det utvivlsomt, at de af Corymorpha nutans opam- 

 mede Medusegemmer udvikle sig til en Art af den af 

 Forbes opstillede Meduseslægt Steenstrupia. Denne cha- 

 racteriseres nemlig af ham (Monograph of the British 

 naked-eyed Medusæ, pag. 72) ved "en conisk tilspidset 

 Kappe (Umbrella), 4 simple Radiærkar, som fortil ende 

 i 4 Randknuder, fra den ene af hvilke en enkelt Ten- 

 takel er udviklet; Maven (Pedunculus) snabelformig, med 

 en simpel rund Aabning". 



Den af Forbes anførte Character, at "Apex of Umbrella 

 er forbunden med Subumbrella ved en Streng (chord)" kan 

 vel ikke tillægges nogen videre Betydning, da denne Streng, 

 en Levning af Forbindelsescanalen med Ammedyret, af 

 hvilket Medusen blev opfostret, senere absorberes. 



Med disse Characterer stemme nu de af Corymorpha 

 nutans opammede Medusegemmer fuldkommen overens, 

 alene med Undtagelse af, at Mundaabningen endnu fattes 

 dem. Det er endog ikke usandsynligt, at de, løsrevne 

 fra Ammedyret, udvikle sig til den af Forbes under Navnet 

 Steenstrupia rubra (1. c, Tab. 13, Fig. 1.) beskrevne Art. 



2. CORYMORPHA SARS1I, Steenstrup. 

 (Tab. 2, Fig. 18—24, Tab. 4, Fig. 9—23.) 

 Corymorpha nutans, Sars Eeise i Lofoten og Finmarken, Nyt 

 Mag. f. Naturvid., 1850, Vol. 6, pag. 135. 



Corymorpha Sarsii, Steenstrup i Meddelelser fra den naturh. 

 Forening i Kjøbenhavn, 1854, pag. 48. 



Corymorpha Sarsii, Sars, Chr. Vid.Selsk. Forhandl., 1859, pag. 98. 



Denne paa min første nordlandske Keise i 1849 opda- 

 gede Form er hidtil kun funden i Vestfjorden ved Lofoten, 

 hvor den forekommer temmelig hyppig paa fra 12 indtil 

 50 F. D., Sandbund eller sandblandet Lerbund. 



Den er, som nøiere Undersøgelser have vist mig og 

 som min Ven Steenstrup formodede, ganske vist en fra 

 C. nutans forskj ellig Art, skjøndt den ligner denne over- 

 maade meget i sit hele ydre Udseende. 



Corymorpha Sarsii synes ikke at opnaa en saa bety- 

 delig Størrelse som C. nutans. De største af mig iagt- 

 tagne Exemplarer havde kun en Længde af 2^-— 3". An- 

 tallet af de nederste Tentakler var ogsaa ringere, nemlig 

 kun 30—40 (Sml. Tab. 2, Fig. 18.) 



De gemmebærende Stilke (Fig. 19, 20) ere ialminde- 

 lighed hos denne Art forholdsvis langt kortere (i — -J. af 

 de nederste Tentaklers Længde), og deres Antal ringere 

 end hos C. nutans; hos et 2i" langt Individ fandtes saa- 

 ledes kun 10 saadanne, af hvilke 8 større og mellem dem 

 2 meget mindre. De ere først i deres ydre Ende delte 

 eller besatte med et Par meget korte Grene, som bære 

 de kun lidet talrige Medusegemmer, hvilke saaledes danne 

 en tæt rundagtig Klynge. 



trace yet of the 3 other tubercles; and the smallest (a) 

 (10 — 15 times less than those most developed) were simply 

 oval, without aperture at the anterior extremity of the 

 umbrella, and without any trace of tubercles. 



From the observations here quoted, which entirely 

 coincide with my own published previously in the year 

 1835, it appears undoubted that the Gonozooids fostered 

 by the Corymorpha nutans develop themselves to a species 

 of the Medusa-genus Stenstrupia established by Forbes. 

 He characterises this genus (Monograph of the British 

 naked-eyed Medusæ, page 72) by "a conically pointed 

 umbrella 4 simple radial vessels terminating in 4 margi- 

 nal tubercles, from one of which a single tentacle is de- 

 veloped; the manubrium (pedunculus), proboscidiform, with 

 a simple circular aperture." 



The characteristic cited by Forbes that "the apex 

 of the umbrella is connected with the sub-umbrella by a 

 chord", must probably be considered as unimportant; 

 because this chord, a remnant of connexion with the 

 parent animal, is afterwards absorbed. 



The gonozooids fostered by the Corymorpha nutans 

 coincide perfectly with these characteristics, excepting 

 only that the oral aperture is still wanting. It is even 

 not improbable that, when disconnected from the parent 

 animal, they may develope themselves into the species 

 described by Forbes under the name of Steenstrupia rubra 

 (1. c, Tab. 13, fig. 1.) 



2. CORYMORPHA SARSII, Steenstrup. 

 (Tab. 2, fig. 18—24, Tab. 4, fig. 9—23). 

 Corymorpha nutans, Sars „Reise i Lofoten og Finmarken", 

 Nyt Mag. f. Naturvid., 1850, Vol. 6, page 135. 



Corymorpha Sarsii, Steenstrup in „Meddelelser fra den Naturh.- 

 Forening i Kjøbenhavn", 1854, page 48. 



Corymorpha Sarsii, Sars, Chr. Vid. Selsk. Forhandl., 1859, p. 98. 



This form, discovered during my first visit to Nord- 

 land in 1849, has hitherto been found only in Vestfjorden 

 near the Lofoten islands, where it occurs rather abun- 

 dantly in 12—50 fathoms on sandy bottom or clay mixed 

 with sand. 



It is, as more minute research has convinced me, 

 and as my friend Steenstrup supposed, without doubt a 

 different species from the C. nutans, although it resembles 

 it very much in its whole external appearance. 



Corymorpha Sarsii does not appear to attain so 

 considerable a size as C. nutans. The largest specimens 

 observed by me had only a length of 27 2 — 3". The num- 

 ber of the lower tentacles was also smaller, namely only 

 30—40 (comp. Tab. 2, fig. 18). 



The reproductive stalks (fig. 19, 20) are usually in 

 this species relatively much shorter (% — % of the length 

 of the lower tentacles) and they are also fewer than in 

 the C. nutans; in a specimen 2 1 / 2 " long there were only 

 10, of which 8 larger, and among them 2 much smaller. 

 They are, at their extremities only, divided, or furnished 

 with a few very short branches bearing the not very 

 numerous gonozooids which form thus a thick roundish 

 cluster. 



Lz. 



