75 



Pedicellarier bemærkedes ikke. 



Vor nye Søstjerne udmærker sig fra de hidtil be- 

 kj endte Arter af Slægten Goniaster (fra hvilken Gonio- 

 discus M. T. heller ikke synes at være forskj eilig) ved 

 dens tætte Bevæbning af Børster eller Smaapigge paa 

 Kroppens hele Bygside ligetil dens nederste dor so-v entr ale 

 Band. Den svarer saaledes ikke til den af Müller og 

 Troschel blandt andre for Slægten angivne Character: 

 „Randpladernes Rand er omgiven af en Krands af Gra- 

 nula, eller deres Omfang bedækket af Granula; indtil 

 denne Omgivelse ere de fuldkommen nøgne; undertiden 

 bære de paa Midten Tuberkler". 



Denne Character er dog aabenbart ikke af nogen 

 væsentlig Betydning, ligesom ogsaa den, hvorved Gonio- 

 discus skal adskille sig fra Goniaster, nemlig: „Randpla- 

 derne ere paa deres hele Overflade granulerede". 



Goniaster hispidus vil kjendes ved følgende Diagnose: 



Corpus pentagonum, dorso convexo, ventre piano, 

 radio disci ad eundem brachiorum (in individuo unico 

 observato, verosimile juvenili, 11 Mm. magno) ut 1 * 1V 5 , 

 sinubus inter brachia apice obtuse rotundata perparum 

 excavatis. Dorsum to tum, etiam scuta marginalia superi- 

 ora et pars dorsalis scutorum marginalium inferiorum, 

 spinulis minutis cylindricis obtusis dense tectum. Scuta 

 dorsalia marginalibus minora, rotundata, numerosa; scuta 

 ventralia dorsalibus majora, pauca, polygonalia, spinulis 

 minutis subulatis subseriatis minus dense tecta. Spinæ 

 ad sulcos ambulacrales 3—4 seriatæ, subulatæ, interiores 

 majores, exteriores minores. Tessella madreporiformis 

 centro disci paulo vicinior qvam margini. Color pallide 

 roseus. 



Habitat ad insulas Lofoten (Skraaven) profunditate 

 200—300 orgyarum. 



FORKLARING AF FIGURERNE. 



Tal). 8, Fig. 24 forestiller Goniaster hispidus, seet ovenfra i naturlig 

 Størrelse. 



Fig 25. Den ene Halvpart af samme, seet ovenfra, forstørret 

 (nedentil ere Piggene skrabede af for at vise de under- 

 liggende Plader), a a a den piggede Overflade af Ryg- 

 huden ; bb deu blottede Rand; c større Dorsalplader, dan- 

 nende en Rosette omkring Centrum; d Analaabningen; 

 e Madreporpladen; f Respirationsporer ; g dorsale Rand- 

 plader; h den dorsale Del af de ventrale Randplader; 

 i Enden af en Straale. 



Fig. 26. Den samme Halvpart, seet fra den ventrale Side (nedentil 

 er en Del af Piggene skrabede af), kk ventrale Pigge; 

 l ventrale Plader; m ventrale Randplader; n Furepa- 

 piller; o Munden; p adorale Pigge; r Randpigge; s blot- 

 tede Ambulacralplader. 



Pedicellarice were not observed. 



Our new star-fish is distinguished from the hitherto 

 known species of the genus Goniaster (from which Gonio- 

 discus M. T. does not seem to differ) by its thick armour 

 of bristles or small spines on the whole dorsal side of the 

 body all down to its lowest dorso-ventral margin. It does 

 not therefore answer to the character given among others 

 by Müller and Troschel for the genus. „The margin of 

 the marginal plates is surrounded by a circle of granula 

 or their circumference is covered with granula; up to 

 this circumference they are perfectly naked; sometimes 

 they have tubercles in the middle". 



This character is however evidently not of any es- 

 sential importance, neither is that whereby the Goniodis- 

 cus is said to be distinguished from the Goniaster, namely: 

 „The marginal plates are granulated over their whole 

 surface". 



Goniaster hispidus will be konwn by the following 

 diagnosis: 



Corpus pentagonum dorso convexo, ventre piano 

 radio disci ad eundem brachiorum (in individuo unico 

 observato verosimile juvenili 11 Mm. magno) ut 1 J 1Y 5 , 

 sinubus inter brachia apice obtuse rotundata perparum 

 excavatis. Dorsum totum etiam scuta marginalia supe- 

 riora et pars dorsalis scutorum marginalium inferiorum 

 spinulis minutis cylindricis obtusis dense tectum. Scuta 

 dorsalia marginalibus minora rotundata numerosa; scuta 

 ventralia dorsalibus majora, pauca, polygonalia, spinulis 

 minutis subulatis subseriatis minus dense tecta. Spinæ 

 ad sulcos ambulacrales 3—4 seriatæ subulatæ interiores 

 majores exteriores minores. Tessella madreporiformis 

 centro disci paulo vicinior quam margini. Color pallide 

 roseus. 



Habitat ad insulas Lofoten (Skraaven) profunditate 

 200—300 orgyarum. 



EXPLANATION OF THE FIGURES. 



PL 8, fig. 24. Kepresents Goniaster hispidus seen from above, 

 natural size. 



Fig. 25. The one half of the same seen from above, magnified (in 

 the lower part the spines are scraped off in order to show 

 the underlying plates), a a a the hispid surface of the 

 dorsal skin; b b the denudated edge; c larger dorsal plates 

 forming a rosette around the centre; d the anal orifice; 

 e the madreporic body; f respiratory pores; g dorsal 

 marginal plates; h dorsal part of the ventral marginal 

 plates; i extremity of a ray. 



Fig. 26. The same half seen from the ventral side (in the lower 

 part the spines are scraped off), kk ventral spines; I 

 ventral plates; m ventral marginal plates; n ambulacral 

 papillæ; o mouth; p adoral spines; r marginal spines; 

 s adambulacral plates denudated. 



