18 



Tet hy a cranium, Lamarck. 



Flere Exemplarer, alle runde, Overfladen besat med 

 talrige Papiller (Tab. VII. Fig. 16). Naalene lindes frem- 

 stillede Tab. V, Fig. 3 og 4. 



Findested. 



Station 8, 323. 



Tethya cranium, var. infrequens, Carter. 



Den stemmer i sit Udseende og sin Bygning fuld- 

 kommen overens med Th, cranium (Tab. VII, Fig. 17 og 

 18). Den afvigende Form af Mta (cp >> 90°) og Mta 

 (cp < 90°) lindes fremstillet Tab. V, Fig. 5, a, b. I det 

 ene Exemplar fandtes et Embryo (Tab. V, Fig. 5, c), i 

 hvilket Naalenes radiære Anordning og deres Form tydeligt 

 sees. * (c/)^>90°) har, som det vil sees, en noget af- 

 vigende Form fra de samme Naale hos den voxne Svamp 

 (Fig. 5, d), idet Armene er meget mere divergerende. 



Findested. 



Station 286. 



Thenea muricata, (Bowerbank) Gray. 



Af denne Svamp, der har faaet saa mange Navne l , 

 er der fanget en Masse Exemplarer og af meget forskjellig 

 Størrelse lige fra omtrent knappenaalshovedstore til saa- 

 danne, eler er 5 — 6 cm i Gjennemsnit (Tab. VII, Fig. 19). 

 Næsten alle de større har et tydeligt Osculum af 3 — 4 ,?m ' 5 

 Gjennemsnit paa den øvre Flade. Den eneste Forskjel, 

 der kan tindes mellem alle disse Exemplarer, er tildels 

 Farven, idet nogle, især de mindre, er lysere af Farve, 

 medens de større er brungraa, og desuden Størrelsen og 

 Taggetheden af de store st Naale, som det vil sees af Tab. 

 V, Fig. 6, 7, 8 og 9. 



Findested. 



Stat. 1, 29, 262 286, 303, 323, og andre ukjendte. 



Se Vosmaer: .Report etc. Pag. 



Tethya cranium, Lamarck. 



Several specimens; all of which are round. The 

 surface is beset with numerous papillæ (PL VII, fig. 

 16). The spicules will be found illustrated on PI. V, 

 figs. 3, 4. 



Habitat. 



Stations No.s 8, 323. 



Tethya cranium, var. infrequeus, Carter. 



In external appearance, and structure, this specimen 

 quite corresponds with Th. cranium (PI. VII, figs. 17, 18). 

 The divergent form of spicules, Mta (cp ^> 90 °) and Mta 

 (^)<^90°), is seen illustrated in PL V, figs. 5, a, b). In 

 one specimen an embryon was found (PL V, fig. 5, c), in 

 which the radiating arrangement of the spicules, and their 

 form, are, distinctly, visible. The Mta (cp <^ 90 °) has, as 

 will be seen, a very different form from the same spicule 

 in the adult sponge (fig. 5, d), in so far as, that the arms 

 are much more divergent. 



Habitat. 



Station No. 286. 



Thenea muricata, (Bowerbank) Gray. 



Of this sponge, to which a number of designations * 

 has been applied; a large number of specimens has been 

 obtained; and of very various sizes, ranging from about a 

 pin's head in size, up to specimens measuring 5 — 6 cm in 

 diameter (PL VII, fig. 19). Almost all the large ones 

 have, a distinct osculum of 3 — 4 mra diameter, seated on the 

 superior surface. The only difference which can be found, 

 between all these specimens is, partly, in colour, in as much 

 as, that a few, especially the smaller ones, are lighter in 

 colour, whilst the large ones are brownish grey, and partly, 

 also, in the size and aculeation of the large st. spicules ; as 

 will be apparent on referring to the illustration PL V, 

 figs. 6, 7, 8, 9. 



Habitat. 



Stations No.s 1, 29, 262, 286, 

 stations, the record of which is lost. 



303, 323, and other 



Vide. Vosmaer's Report etc. Pao 



