from St. Minver, North Cornwall. 147 



•of Pleurodictyum are plentiful ; on one loose slab of slate, 3 feet by 

 2\ feet, four colonies were found ; some of the specimens are in very 

 fair preservation. Near the eastern end of this section, two small 

 Trilobites were found in blue slates on the foreshore : they have 

 been referred by Dr. H. Woodward to Fhacops latifrons. 



3. Gentle Jane or Cant Hill to Cant Cove. 



The beach at Gentle Jane, like most of those along these fore- 

 shores, is composed of worn fragments of blue slate, with hardly any 

 admixtui-e of quartz pebbles or sand. It is situated at the western 

 end or foot of a long flat-topped hill, 247 feet in height, composed 

 for the most part of volcanic lavas and tuifs (Schalstein). The 

 slates of this range of shore become increasingly fossiliferous as the 

 igneous rocks are approached. About 300 yards from Gentle Jane 

 the slates are nodular and contain casts of Cephalopods, which are 

 described by Mr. G. C. Crick in the annexed paper. They belong 

 to Orthoceras, CopMnoceras, and Agoniatites. 



To the east of the area characterized by the predominance of 

 ■Cephalopods there are three exposures of igneous rock, and about 

 150 yards beyond the last of these there are some nodular grey, 

 greenish, and buff slates, in which, with some Polyzoa and other 

 fossils, a fair number of Trilobites belonging to the genus Phacops 

 are present. Some of these are in good preservation, and retain the 

 facetted structure of the eyes in fairly perfect condition. 



Yet further eastwards the foreshore is covered to a varying extent 

 with rounded fragments of lava and tuff similar, Mr. Ussher informs 

 me, to the Schalstein of Drake's Island, Plymouth, and other localities 

 in Cornwall and Devon. Some of the slates interbedded with the 

 Schalstein are filled with fossils which are now for the most part 

 decomposed to a bright red rust, and consequently in a very fragile 

 condition. 



This tract of foreshore included in the term of ' Cant Hill ' is by 

 far the most prolific in the area of St. Minver, both in the number 

 and variety of its fossils, and in addition to the genera already 

 mentioned as occurring in it the following are also represented : 

 Petraia, Zaplirenlis, Cyathophyllum, Amplexus, Favosites, Alveolites, 

 Pleurodictyum, Monticulipora, Fenestella, Polypora, Phyllopora, Atrypa, 

 Spirifer, Pentamerus, Rhynchonella, OrthotJietes, and Conularia. 

 Crinoidal remains are also plentiful, but they cannot be assigned to 

 any particular genus. 



4. Cant Cove to Dinham Creek, 



Bounding Cant Cove, we find on the shore to the east pale grey 

 elates from which were obtained Styliola, Polypora, and a well- 

 preserved and interesting small Trilobite, which Dr. H. Woodward 

 has figured and referred to Phacops granulatus, Miinster. A fairly 

 perfect cast of an Orthoceras, figured and described by Mr. Crick as 

 near to 0. hercynicum, was also found in these slates. Crinoidal 

 stem-joints are likewise common. 



