J. Milne — Ice and Ice-worh in "Newfoundland, 403 



a square-meshed sarco-spiculous network which covers the surface of 

 perfect specimens of Euplectella aspergillum, and Mr. Carter has 

 suggested to me that we may now expect to find a similar, but vitreo- 

 spiculous, network coating the surface of many of the Vitreo-hexac- 

 tinelUdcs. Perhaps the first instance of this has been found in 

 Fubrochus in the fossil state, and considering this possibility and 

 the absence of marked internal characters in our new sponge, it 

 will be well to wait for further investigations before coming to any 

 conclusion as regards its generic affinities. 



VITREO-HEXACTmELLID^. 

 EuBROCHTJS CLAusus, miM. 

 Sponge, clavate, solid, sessile (?), simple or branching. 

 Skeleton, a network, originally siliceous, characterized by sexradiate knots, filling 



the interior, and forming on the exterior a rectangular meshwork. 

 JDistribittion, Cambridge, Upper Gault, remanie in coprolite bed at the base of the 



Chalk-marl. [Note. — On the back of the tablet on which the Museum 



specimen is mounted I find a note by Mr. Seeley, stating that the form also 



occurs in the Red Chalk of Hunstanton.) 



EXPLANATION OF PLATE XIV. 



Fig. 1 . Eubrochus clausus, Woodwardian Museum, natural size. 



Fig. 2. Longitudinal section of Mr. Jukes Browne's specimen, natural size ; 

 [a) coprolite encrusting the exterior ; {b) principal part of the sponge, with 

 dotted lines to indicate the course of the internal fibres; {c) rudimentary 

 branch ; {d to e) exterior network preserved by the encrusting coprolite ; 

 {g) position where indications of the connexion of the dermal reticulation 

 with the interior fibres are to be seen, shown magnified in Fig. 4; {I V) lateral 

 margins. 



Fig. 3. Dermal reticulation of Fig. 1, showing at {a) the appearance of new sex- 

 radiate elements. ( x 25.) 



Fig. 4. Part of the network extending along the curved line from {d) to (e) of 

 Fig. 2, showing centre of inner sexradiate at [a). ( x 25.) 



Fig. 5. Finer network from the interior of Fig. 2. ( x 25.) 



Fig. 6. Spherical bodies of various sizes ; {a) circular foramen, (x 100.) 



Fig. 7. Acerate spicule from Fig. 2. ( x 100.) 



Figs. 8, 9, 10. Curvilinear and branched bodies like contort spicules. ( x IOC.) 



Ill, — Ice and Ice-Work in Newfoundland. 

 By John Milne, F.G.S., 

 Professor of Geology in the Imperial Mining College, Tokei, Japan. 

 {Continued from the August Number, page 350.) 



Coast Ice of Newfoundland. — Icebergs have an advantage over 

 coast-ice in their imposing appearance, which has perhaps been in 

 part instrumental in raising them to the high position which they 

 now occupy as workers of Geological changes. Many Manuals of 

 Geology, and many diagrams drawn to illustrate the same science, 

 have oft-times portrayed a well-known flat-topped berg, carrying 

 a rock, in the Antarctic regions ; but neither books nor lecture- 

 diagrams, taken collectively, give any adequate idea of coast-ice as 

 a similar ascent. From what I have seen of coast-ice and of its 

 effects, I feel persuaded that it is an agent of at least as great, if not 

 of greater universality than either glaciers or icebergs, and taken 

 as a whole perhaps also as an agent of equal power. Of the 

 various forms of sea-ice known as "berg-ice," "floe-ice," "pack- 



