298 Geological Society :— 
garis?); (4) one to two feet of ochreous cave-earth, limestone-breccia, 
and sandy layers, with remains of Hlephas antiquus, Rhinoceros hemi- 
techus, Hyena, Canis lupus, Ursus speleus, Bos, and Cervus; (5) 
irregular stalagmite, partly enveloping a huge tusk of an Elephant 
imbedded below it; (6) limestone-breccia and stalagmite, from 1 
to 2 feet thick, with bones of Ursus and Bos; (7) irregular bed of 
stalagmite, 1 foot or more, with Ursus; (8) dark-coloured super- 
ficial earth, kept soppy by abundant drip, with bones of Bos, Cervus, 
Canis vulpes, horns of Reindeer and Roebuck, together with shells 
of Patella, Mytilus, Purpura, Litorina (probably brought into the 
cavern as food by birds), and also pieces of ancient British pottery. 
The marine sand at the bottom of “‘ Bacon Hole” was analogous to 
that on the rocky floor of the San Ciro Cave, near Palermo; but 
contained fewer species of Mollusca. ‘The uppermost layer of sta- 
lagmite is about 30 feet above high water. The Elephant-remains 
belonged to at least three individuals, one of which was adult, and 
one young with milk-dentition. 
‘Minchin Hole” is the grandest and most. spacious of all the 
Gower Caves, being 170 feet long, by 70 feet where widest, and 
35 feet high at the entrance. Here the section gave :—(1) Loose 
limestone-breccia, 3 feet; (2) Yellow cave-earth, 9 inches ; (3) 
Sand, 1 foot; (4) Blackish sandy loam containing abundant remains 
of Rhinoceros, Elephas, and Bos, 2} feet; (5) Greyish-yellow ma- 
rine sand, varying in thickness from 1 to 4 feet, and resting on the 
rocky floor. Some of the lower jaws of Rhinoceros from this deposit 
exhibit Litorine and comminuted shells imbedded in the encrusting 
matrix : and the black sand yielded Helix hispida similarly attached. 
In the interior, the cave-earth was thicker, and the black sandy 
loam more unctuous. The mammalian remains were closely analo- 
gous with those from Bacon Hole; but the Elephant-remains (ZH. 
antiquus) were fewer, and those of Rhinoceros hemitechus were more 
numerous and better preserved, including two skulls. No remains 
of Elephas primigenius or of Rhinoceros tichorhinus were met with 
in Bacon Hole or Minchin Hole. 
« Bosco’s Den ”’ is a cavernous fissure, of great interest, between 
** Bacon Hole” and “ Minchin Hole.” It is about 70 feet high, 
and has been worked out by Col. Wood, who, having succeeded in 
reaching a hole called (by the quarrymen) ‘‘ Bacon’s Eye,” found it to 
be an angular opening (23 feet in diameter) at the top of one of the 
great vertical fissures in the limestone, and leading into a fine cavern. 
Beneath it the fissure was filled up with a mass of angular fragments 
of limestone (with bones, teeth, and land shells) impacted in ochreous 
loam, about 20 feet in height, resting on a solid platform of breccia, 
beneath which the fissure had to a great extent been washed out by 
the sea. On enlarging the aperture, by undermining the projecting 
mass of loam and breccia, a cavity was found extending 76 feet 
backwards, with a width of from 7 to 16 feet, and a general height 
of about 15 feet. A line of fissure runs along the angle of the roof, 
and towards the outer part of the cavern the crack widens into an 
irregular flue, which had evidently communicated with the surface : 
