7 o 



ACTINIARIA 



the mesenteries in transverse-sections rather elongated with about 25 30, somewhat richly ramificated 

 folds in the inner and especially in the outer parts. Inner folds of about equal height, considerably lower 

 than the outer folds. Lamellar outer parts of the mesenteries attached to the outer part of the pennons. 

 Parietal muscles well developed, recalling two fans, one on each side of the main-lamella of the mesogloea. 

 The expansion of the parietal muscles on the column the ordinary one. 



Colour in preserved state: the specimens from the Gunhild-Expedition and from Skierstad have 

 an ochreous-yellow scapus with deep black, in the proximal part very numerous grains, which are so densely 

 packed that they almost completely cover the yellow periderm. The scapus of the Bergen-specimen is dirtily- 

 ochreous-yellow ; the capitulum and the tentacles are slate-gray. 



Dimensions in preserved state: i) One Gunhild-specimen (PI. i, fig. 15). Length 3,6 cm, largest 

 breadth 0,5 cm. The other Gunhild-specimen: Length 3,3 cm, largest breadth 0,8 cm. Bergen-specimen i: 

 Length almost 3 cm, largest breadth, a little above the proximal end, 0,5 cm. Length of the tentacles in 

 expanded, preserved state 0,3 0,35 cm. Bergen-specimen 2: Length almost 2 cm, largest breadth 0,3 cm. 



Occurrence: Norway. Finmarken. Skierstadfiord 330 m (Nordgaard 1900 2 sp.). Herlofiord 



130 fms. (Appellof 2sp.), 9 miles N. of Jaderen 140 fms (G. O. Sars i sp.). 

 Skagerrak 370 fms. clay (Gunhild-Expdition 1879, St. 10, 2 sp.). 



Exterior aspect : A distinct physa seems to be absent. True enough the proximal end is a little 

 different in appearance from the other part of the scapus, but the presence of fragments of a periderm in 

 the most proximal part (PI. i, fig. 16) of a Gunhild-specimen indicates that we not have to do with such 

 a regular physa as that of the genus Edwardsia. The periderm of the most proximal part of the body seems, 

 however, to be very easily dropped, and the "Halcampa-paptilae" are probably absent, or at least so sparse 

 that this part appears as having no papillae. A distinct boundary line between the most proximal part and 

 the other part of the scapus is, however, not to be seen. Excepting the most distal part of the scapus, where 

 / the papillae are sparse, these latter are found in great numbers on the other part of the scapus (PI. i, fig. 15). 

 To the papillae numerous grains of sand are attached, as in Halcampa. Besides this the scapus is covered 

 with a yellowish, rather thin periderm, possibly formed only by a stiffened product of the secretion of the 

 gland-cells. Whether there is a regular cuticle I cannot with certainty decide, I have therefore used the 

 vaguer term of periderm here. The capitulum is short, smooth, without a cuticle and with translucent in- 

 sertions of the mesenteries. In the contracted state of the animal, longitudinal furrows, corresponding to 

 these insertions, are visible in the capitular region, as well as in the proximal part of the body. The number 

 of tentacles is 16, probably arranged 8 + 8. They are rather long and conical. Whether the inner tentacles 

 are longer than the outer ones I cannot with certainty decide, but it is possible that it is so. The difference 

 between the sizes of the tentacles in the two cycles is, at any rate, inconsiderable. The oral disc is small, 

 the actinopharynx short and furnished with longitudinal furrows. Whether a ventral siphonoglyphe is pre- 

 sent is doubtful, the sectioned specimens were not well preserved, as regards the actinopharynx. 



Anatomical descriptions : The most proximal part of the body is provided with a high ectoderm, 

 containing numerous gland-cells and nematocysts, partly smaller, about 17 19 ;i, partly larger, about 24 

 26 /i. The ectoderm of the scapus is rather high, with numerous, scattered, typical nematocysts, partly 



