18 



Tethya cranium, Lamarck. 



Flere Exemplarer, alle runde, Overfladen besat med 



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

 stillede Tab. V. Fig. 3 og 4. 



Findested. 



Station 8, 323. 



Tethya cranium, var. infrequens, Carter. 



Den stemmer i sit Udseende og sin Rygning t'uld- 

 kommen overens med Th. craniwm (Tab. VII. Fig. 17 og 

 18). Den afvigende Form at' Mta {<f >» 90°) og Mtn 

 (q><C90°) tindes fremstillet Tab. V. Fig. 5, a, b. I det 

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

 bvilket Naalenes radiære Anordning og deres Form tydeligt 

 sees. Mta (r/>^>90°) bar, som det vil sees, en noget af- 

 vigende Form fra de samme Xaale bos den voxne Svamp 

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



Findested. 



Station 286. 



Thenea muricata. (Bowerbank) Gray. 



Af denne Svamp, der bar faaet saa mange Navne '. 

 er der fanget en Masse Exemplarer og af meget forskjellig 

 Størrelse bge fra omtrent knappenaalsbovedstore til saa- 

 danne. der er 5—6™' i Gjennemsnit (Tab. VII, Fig. 19). 

 Næsten alle de større har et tydeligt Osculum af 3 — 4""' s 

 Gjennemsnit paa den ovre Flade. Den eneste Forskjel. 

 der kan lindes 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 

 Taggetbeden 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 \ r osmaer: Report etc. Pag. •'■. 



Tethya cranium, Lamarck. 



Several specimens; all of which are round. The 

 surface is beset with numerous papillae (PI. VII. fig. 

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



figs. 3, 4. 



Habitat. 

 Stations No.s 8. 323. 



Tethya cranium, var. infregueus, Carter. 



In external appearance, and structure, this specimen 

 quite corresponds with 77/. craniwm (PI. VII, tigs. 17, 18). 

 The divergent form (if spicules. Mta (qn ^> 90 u ) and Mta 

 (f/<^9u"). is seen illustrated in PI. V, figs. 5, a, b). In 

 one specimen an embryon was found (PI. V, tig. 5, c), in 

 which the radiating arrangement (if the spicules, and their 

 form, are, distinctly, visible. The Mta k/<^90"i lias, as 

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

 in the adult sponge (fig. 5. '/). in so far as. that the arms 



are much mure 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"" in 

 diameter (PI. VII, fig. 19 1. Almost all the large ones 

 have, a distinct osculum of 3 — 4""" 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 PI. V. 

 figs. 6, 7, 8, 9. 



Habitat. 

 Stations No.s 1. 29. 262. 286, 303. .".23. and other 

 stations, the record of which is lost. 



' Vide. Vosmaer's Report ete. Pag. 



