560 Notices of Memoirs — Oeohgy of the Isle of Man. 



have also been described and figured in the Geological Magazine 

 for July, 1894, p. 292, Pi. IX. Figs. 5 and 6. They are typical of 

 the Moffat Shales. 



4. It may be remarked that the figured interior of the bipartite 

 carapace of Macrocaris Gorhyi, Miller, referred to in our Tenth 

 Keport, at page 468, Report British Association for 1893, appears 

 (if looked at upside down) very much to resemble some of the 

 bivalved Aptychopses figured in the Monograph of Paleozoic 

 Phyllopoda, Pal. Soc, 1892, pi, xv., but with a more acutely 

 sagittate outline, and without the definitely concentric umbonal 

 Btrise. 



If the carapace in the drawing (fig. 43) exposes its interior, it 

 seems to lie unconformably with respect to the body-rings, for they 

 appear to be covered by the carapace upside down. If it normally 

 covered the body it would show its exterior. 



Is it possible that after death, the attachments of the body and 

 carapace having been loosened, the carapace turned quite over, and 

 the parts of the animal floated into a position reverse to what they 

 held in life ? Or have we here two valves and an imperfect body of 

 an Aptychopsis which during decay were washed into a reversed 

 position — that is, with the abdomen projecting from the anterior 

 region, as is not unusual with some fossil Ceratiocaridce'i 



5. By favour of Dr. Wheeltou Hind, F.G.S., we have very lately 

 seen, from Mr. George Wild's collection, some pyritous specimens 

 of what seems to be a very small EstJieria in shale from the roof of 

 the Bullion Coal, Lower Coal-measures, lately worked at Trawden, 

 near Colne, in North-east Lancashire. 



6. A specimen of Estheria Daivsoni, Jones (Geol. Mag., 1870, 

 p. 220, PI. IX. Fig. 15; ibid., 1876, p. 576; ibid., 1878, p. 101, 

 PI. III. Fig. 2), has been obtained from the vicinity of Five-Islands, 

 Nova Scotia, by Mr. H. Fletcher, of the Geological Survey of 

 Canada. ' Like a former specimen it may be from the Horton series; 

 and has been sent by Sir W. Dawson, F.R.S., of Montreal, for our 

 examination. 



III. — On the Permian Strata of the North of the Isle of Man. 

 By Professor Boyd-Dawkins, F.E.S. 



rriHE main features of the geology of the island are identical with 

 i those of Cumberland and Westmoreland. The Ordovician 

 strata form the "massif" in both areas, and constitute the sea-worn 

 floor upon which the Carboniferous rocks rest unconformably. The 

 Red Sandstone series of Peel, 1368 feet in thickness, occnpies but 

 a very limited area, extending from the Creg Malin, along the sea- 

 front, in a line of picturesque cliffs, about one and a half mile to 

 the north-east, and extending inland about 1700 feet. The rocks 

 may be divided into two distinct groups. First, the Peel Sandstone 

 series, or Roth-todt-liegende, which presents a thickness of 913 feet, 

 and the calcareous conglomerates and breccias of the Stack series, 

 455 feet thick, representing the Magnesian limestone of the Permians. 

 These rocks are faulted into the Ordovician slates, and neither their 



