44 FOSSIL ESTHERLE, 



1. From the Muschelkalk (or rather the Lettenkohle-group) on the Prim, near Bothen- 

 munster, not far from Bottweil, about 50 miles south of Stuttgart. A dark-grey, hard, 

 argillaceous, thin-bedded rock, very slightly calcareous, weathering ochreous; casts of 

 Esfheria minuta (varying from ~ inch to ^ and less in length) on the plane of bedding. 

 From Mr. F. von Alberti, of Friedrichshall. 



2. From Ilaigerloch, in Swabia (Hohenzollern), 32 miles S.S.W. of Stuttgart, and 44 

 miles S.E. of Strasburg. Light-brown and fine-grained limestone (weathering grey), from 

 the dolomitic beds of the Lettenkohle formation, between the Muschelkalk and the Keuper. 

 The specimens (casts of apparently double valves) are in the mass of the specimen, and 

 are but few. From Dr. Krantz, of Bonn. 



3. From Sinsheim, in Baden, on the Elsenz, 23 miles S.S.E. of Mannheim. Brown, 

 line-grained, gingerbread-looking, dolomitic (?) limestone. The Estherics (casts of double 

 valves) lying crowded on two planes of bedding, which are half an inch apart. Frag- 

 ments of Myalina (?) accompany the Estherics on one of the specimens. These are marked 

 " Keuper-Mergel," and were given to me by Dr. Krantz. 



4. From Heilbronn, on the River Neckar, in Wurtemberg, 36 miles north of Stuttgart. 

 Yellowish-grey, fine-grained, argillaceous stone, hard and heavy, and finely micaceous. 

 Estherics numerous in casts on the surface-planes, together with Lingula tenuissima in 

 ecprally large numbers, and a cast of the two valves of a jPteurophorus. Belonging to the 

 " Lowest beds of the Keuper-Mergel." Two specimens, from Sir C. Lyell. 



Another specimen, very similar, but Avith the Lingulcs in better condition, and the 

 Estheria-casts less flattened, from MM. Engelhardt and Schimper, marked "Dolomie 

 superieur du Muschelkalk." 



These specimens afford crushed carapaces and often shell-less casts, which are wrinkled, 

 rather than ridged, concentrically, and they rarely afford a clear trace of the distinctive 

 reticulate sculpture (PI. I, fig. 30). 



5. Light-brown, laminated, sandy clay, with numerous delicate casts of Estherics, of 

 different sizes, 1 on abed-plane. From the Lettenkohlenschiefer (shales of the Lettenkohle), 

 near Weyhers, Bavaria. This was kindly sent to me in February, 1862, by Herr E. 

 Ilassencamp, of Weyhers (Franconia), Bavaria, in fulfilment of a wish expressed, in the 

 ' Neucs Jahrbuch,' 1861, Heft 7, 2 p. 834, that I might be favoured with specimens of 

 Estherics by Continental geologists. 



Mr. Ilassencamp informs me that the Estheria minuta occurs in the West Rhbn — 

 (1) In the Lettenkohlenschiefer near Weyhers and Fulda, as well as in the dolomite 

 belonging to the latter, also containing Lingula tenuissima. 



1 These are all small, varying from -}| to -^ inch and less in length. 



" A provisional list of the species of Estherice that I had met with in November, 1861, appears in 

 this number of the ' Neues Jahrbuch;' considerable alterations, however, in the list have since been made, 

 as are shown in this monograph. 



