38 



Expeditionen. metlens den eiuliui var he], og denne Art 

 skiller sig. saavidt jeg kan se. i intet Punkt fra M. Sarss 

 Beskrivelse af M. plirijfiia, — kun er den langt større end 

 denne. Dens Høide er niellem 30 og 40 cm., dens Dia- 

 meter ved Basis 15 — 20 mm., ovenfor Blastostylerne 6 — 8 

 mm., og i den distale Ende 10—12 mm. Larverne, der er 

 ovale af Form, har en Længde af 8 — 10 mm. og deres 

 største Bredde er ca. 5 mm. 



Muligens vil det ved senere Undersøgelser, — mere 

 indgaaende end dem, jeg har kunnet anstille jiaa de løs- 

 revne Dele af Dyret, som er opbevarede — vise sig, at 

 Nordh.-Exp. Exemplarer representerer en ny Art, men 

 foreløbig henfører jeg dem til den tidligere kjendte Art, 

 M. pl ir ! I gi a. 



rindested. St. 303. 



Myriothela gigantea, n. sp. 



(Tab. IV, Fig. 1). 

 Forelpbig Beskrivelse. Bonnevie ("20). 



Trophosome. Polypen, der er ca. 30 era. lang, er 

 noget opsvuhnet ved Basis — Diameter 7 — 10 ram. — og 

 smalner jevnt af mod den distale Ende. Hydrorhiza til- 

 spidset, med Heftetraade. KoUeformede Tentakler da>kker 

 Polypens distale Halvdel, medens Blastostyler findes spredt 

 over den proximale. Disse er i den distale Ende forsynede 

 med rudimentære kolleformede Tentakler. 



Gonosme. Pseudomedusoide Gonoforer siddende paa 

 Blastostylerne, dor hos Hun-Individer er lange og tynde 

 (10 — 12 mm.) med en eller to Gonoforer, medens de hos 

 Individer af Han-Kjon kun har en Længde af 6 — 7 mm. 

 og er helt dækkede med Gonoforer. 



Denne Art skiller sig fra M. plirygia ved sin spidse 

 Hydrorhiza, og ogsaa derved at Blastostylerne sidder meget 

 aabent fordelt over hele den proximale Halvdel af Polypen, 

 medens de hos nævnte Art findes tæt sammenstillede paa 

 den nederste ^ 5. 

 Findested. 303. 



Myriothela mitra, n. sp. 



(Tab. IV, Fig. 3). 

 Foreløbig Beskrivelse, Bonnevie (-9). 



Trophosome. Polypen er ca. 5 cm. høi, kegleformig 

 tilspidset — Diameter ved Basis 10 mm., ved Toppen 

 1 — 2 mm. Hydrorhiza tilspidset, 1 — 2 cm. lang. med 

 Heftetraade. Ingen Tentakler. Blastostyler kegleformige, 

 med noget boiet Spids, der bærer en Del kolleformede 

 Tentakler. 



Gonosome. Pseudomedusoide Gonoforer siddende, 

 spredt over Blastostylerne. 



Denne Art er meget skarpt adskilt fra de ovrige 

 kjendte Arter; men skjønt Hydranthen er fuldstændig nøgen, 



tion. As far as I can see, tliis species difters in no re- 

 spect from that described by M. Sårs as 21. plinjijia, 

 except in its far greater size. Its height is between 30 

 and -to cm., its diameter at tho base from 15 to 20 mm., 

 above the blastostyles from 6 to S mm., and at the distal 

 end from KJ to 12 mm. The larva-, which are oval in 

 form, have a length of from 8 to 10 mm., and their 

 greatest breadth is about 5 mm. 



It is possible that subsequent investigations, more 

 minute than those which I have been able to prosecute 

 with only the fragments of the animal that have been 

 preserved, will show that the N. Atlan. Exp. speciracns 

 represent a new species; but at present I will refer them 

 to the previously known species, M. phri/r/iu. 



Locality. Station 303. 



Myriothela gigantea, n. sp. 



(Pl. IV, tig. 1). 

 1'reliminary Jescription, Bonnevie (-0). 



Trophosome. The polyp, which is about 30 cm. 

 long is somewh.it swollen at the base. where the diameter 

 is from 7 to 10 mm., and tapers gradually towards the 

 distal end. Hydrorhiza pointed, with attaching filaments. 

 Clavate tentacles cover the distal half of the polyp, the 

 blastostyles being scattered over tho proximal part, and 

 furnished at their distal end with rudimentary clavate ten- 

 tacles. 



Gonosome. Pseudomedusoid Gonophores sessile ujioii 

 the l)lastostyles, which in females are long and thin (10 — 20 

 mm.), with one or two gonophores; while in male speci- 

 mens, they are only 6 or 7 mm. in length and completely 

 coverod with gonophores. 



This species differs from M. phrygia in its pointed 

 hydrorhiza and in the scanty distributiou of the blasto- 

 styles over the wholc of the proxinuil half of the polyp, 

 whereas in the above-named species, they are crowded 

 together upon the lowest fifth. 



Locality. Station 303. 



Myriothela mitra, n. sp. 



(Pl. VI, tig. Li). 

 Preliminary description, Bonnevie (29). 



Trophosome. Polyp about 5 cm. high, conically 

 pointed. diameter at the base 10 mm., at the top, from 1 

 to 2 mm., with aitachiug filaments. No tentacles. Bla- 

 stostyles conical, with somewhat curving point. bearing a 

 few clavate tentacles. 



Gonosome. Gonophores sessile, scattered over the 

 blastostyles. 



This species is very distinctly separated from the 

 other known species ; but although the hydranth is com- 

 pletely naked and without a trace of tentacles, its entiro 



