94 



deres proximale Eiulo og vendende mod nærmeste Hvdro- 

 cladium. 



Gonosome. Gonangier smalt kegleformige, fæstet med 

 Spidsen til Basis af Hydrocladierne. i hvis Plan de ligger. 



Af deuue Art fandtes paa Nordli. -Exp. kun to ganske 

 smaa Kolonier uden Gonangier, og Beskrivelsen er derfor 

 væsentlig tåget fra en Koloni af samme Ai't. der er fundet 

 ved Bodlyerget i Trondhjemsfjorden, men ikke tidligere 

 undersogt. Arten er n;erniest beslægtet med P. <-legantula, 

 men skiller sig fra denne ved Hydrothekernes Plads paa 

 Internodiernes proximale Del, og væsentlig ved Gonan- 

 giernes Form og deres Stilling i Vinklerne ved Hydrocla- 

 diernes Udgangspunkt. istedetfor i Rækker langs Hoved- 

 stammen. Hele Kolonien, men især Gonangierne har en 

 vakker rod Farve, og Aen overgaar i Elegance næsten alle 

 sine Slægtninge. Hoide 2 — 5 cm. 



Findested. St. 9 og lU. 



Aglaophenia compressa, n. sp. 



Tab. VII. Ki-. 4i. 



Trophosome. Kolonien enlcel fjærformet; Hydro- 

 caulus sammensat i den nedre Del. regelmæssig leddet. 

 Hvert Internodium bærer en Gren og to Nematophorer 

 ved dennes Basis. Hydrotheker store, sammentrykte fra 

 Siderne, har foran et skarpt kjolformet Fremspring, der 

 oventil Iclier ud i en lang, spids Tand. Ved Basis af 

 denne sees paa hver Side en ganske liden Udbugtning af 

 Hydrothekranden og ligesaa to smaa Tænder paa hver Side 

 inde mod Hydrocladiet. Laterale Nematophorer svagt ud- 

 adrettede. rager noget frem over Hydrothekernes Rand; den 

 mediane naar omtrent til Halvdelen af Hydrothekernes 

 Hoide. 



Gonosome. Gonangier ægforniige, med en oval Aab- 

 ning skjævt beliggende i distale Ende. De sidder ved en 

 kort Stilk fæstet ved Basis af Hydrocladiernes forste Hy- 

 drothek. eller de bæres af særskilte Smaagrene, du- udgaar 

 fra samme Sted. 



Denne Art har nogen Lighed med A. coniutus. Vcr- 

 rill. idet begge har sammentrykte Hydrotheker og et kjol- 

 formet Frt'mspring paa disse, ligesom Gonangierne og deres 

 Stilling i Kolonien er meget lignende. Men ved at sam- 

 menligne mine Afbildninger med Leviusens (62) Illustra- 

 tioner til nævnte Art, ser man dog en paafaldende For- 

 skjel i Hydrothekernes Bygning. Medens de hos A. cor- 

 mdus smalner sterkt af mod Bunden, ,,soinewhat triangular 

 or obconic in a side view- (Verrill [118!), har de hos 

 denne nye Art omtrent samme Bredde helt ned og er, 

 seet fra Siden, tilnærmelsesvis kvadratiske; desuden er Hy- 

 drothekranden hos A. corindits overalt opdelt i triangel- 

 formigc Tænder. medens den her paa Lengere Stykker 

 er lilat. 



to their jiroximal end. and turned towards tho nearest 

 hydrocladium. 



Gonosome. Gonangia narrow conieal, attached Ijy 

 the apex to the liase of the hydrocdadia. in whose plane 

 they lie. 



Only two very small colonies of this species without 

 gonangia where found on the N. Atlan. Exp.. and the de- 

 scriiition is therefore tåken chietly from a colony of the 

 same species, which was found oft' Rodbjerget in the Trond- 

 hjem Fjord. l)ut has not previously been examined. The 

 species is nearly allied to P. cleganhila. but ditfers from 

 it in the hydrothecæ's place on the proximal part of the 

 internodes and essentially in the form of tho gonangia, and 

 their position in the angles by the base of the hydrocladia, 

 instead of in rows along tho main stem. The whole co- 

 lony, and especially the gonangia, have a beautifnl red co- 

 lour. and in elegance it surpasses almost all its relations. 

 Height 2 — b cm. 



Locality. Stations 9 and lU. 



Aglaophenia compressa, n. sp. 



1'1 VII. tiu-. 1). 



Trophosome. Colony simple i)innate; hydrocaulus 

 compound in the lower portion, and regularly articulated. 

 Every internode bears a hydrocladium, and two nemato- 

 phores at the base of the hydrocladium. Hydrothecæ large, 

 latcrally conipressed, have in front a shar[)ly carinated 

 projection which runs out above in a long. pointed tooth 

 At its base on each side there is a very small swelling of 

 the hydrotheca-margin, and also two small denticles on 

 each side, in towards the hydrocladium. Lateral nemato- 

 phores pointing slightly outwards, projecting a little beyond 

 the margin of the hydrothec;e, and the median one rea- 

 ching to al)0ut half the height of the hydrothecæ. 



Gonosome. Gonangia oviforni. with an oval opening 

 lying obliquely at the distal end. They are on a short 

 stalk attached at the base of the hydrocladiuin"s first hy- 

 drotheca, or are borne on separate iiranchlets. growing out 

 from the same spot. 



This species has some resemblance to A. rorirutu!<. 

 Verrill. iioth having compressed hydrothecæ, and a carina- 

 ted projection on them, the gonangia and their position 

 in the colony being also very similar. But on comparing 

 my drawiiigs with Leinnsen's (G2) illustrations of the above- 

 named sjjecies, a striking difference in the structure of the 

 hydrothecæ^ is apparent. ^^'hereas in A. coruufns. they 

 taper rapidly towards the bottom, are ..somewhat triangular 

 or obconic in a side view" (Verrill [H^J), in this new 

 species their breadth is about the same all the way down, 

 and in a side view they are approximately quadrilateral; 

 moreover, the margin of the hydrothecæ in A. convdnx is 

 always cut u[) into triangular denticles. while hcre long 

 portions of it are smootli. 



