346 PETRIFACTIONS, 109. Helmimholtthus. 



In England^ Sivitzerland^ Germany, Auftria^ Sec. fingic or gre» 

 garious, detached or fixed, with the joints folitary or form- 

 - ing a column which is rarely curved or branched, fmooth or 



warty, rarely 3 or 6-rided, very rarely fquare : the joints 

 when feparated refemblc a radiated ftar: when placed in 

 good vinegar they hive the property of moving, which is 

 merely occafioned by the effervefcence caufed by the acid aft- 1 

 ing upon the calcareous matter of which they are compofed, 



4. With the d.ivifions dillant, orbicular, and conneded by a cen- 



tral thread. | 



•Sy;/. no/, xii. 3. p. I 70, n. 24. Hamb. mag. 9. p, 73, ■ 



Near Brt/tol and in Derbyjhire, in the Harz and various parts of - 



Germanyy in marble or quartz or flint, and often containing a 



a largt portion of oxyde of iron. 



5. Turbinate, with a 5-fided 5-toothed border, 

 Syji. nat. xii. 3./. 169, n. 22. 

 Carpolithus. Muf. TeJ}'. 96. tab, 4. fig. 2. 

 Caryophyllus lapideus. Fogel mineral, 234. 



On mount Randberg in Sivitzerlandy detached, of various fizes,, 

 and fometimes on a flem. 



Gorgonia» The Gorgon ia. 



1. Branched. 



In the principality oi Neocomum, marmorcous- 



a. The Gorgonia nobilis. 

 » In Switzerland^ and near Verona in Italy, 



2. Reticulate. 



tlt^x Drefden in Saxony^ and Co/ors in Bohemia, in marl or fwine- 

 ftone; fometimes only an imprelliion. 



Ahonii^ The Alcyonium. 



1. The Alcyonium arboreum. 



In England^ Bohemiay and Auftria, 



2. The Alcyonium exos. 



In the Netherlands^ Germany and Savitzerland, calcareous, en- 

 tire or in parts. 



3. The Alcyonium digitatum. 



In S^tzerland ind Bafil, marmorcous. 



4. The Alcyonium Lyncurium. 



On mount Randberg in S<iviizerland, 



5- The AIc\onium Burfa? 



Near Pfefmgen in Siuitzerland, 



6. The Alcyonium Cydonmm. 

 Near P/eJingen in ii'wttzerland. 



