GALENA LIMESTONE. 311 



gray. The specific gravity is high. Geodes are common, and are usually filled with oal- 

 cite in a great variety of forms of crystallization, and with pyrite, also in unusual variety 

 of forms and colors. Zinc blende is also quite common, and more rarely. Galena. This 

 combination often gives to these geodes a very beautiful and interesting appearance. 

 Sheets of u'ou pyrites, filling vertical fissures, sometimes traverse the quarries. Zinc 

 blende is sometimes found in small lumps in the interior of the beds. Fossils are some- 

 what rare in this portion, Receptaculites Oweni being most frequent. Columns of Schiz- 

 ocrinus, and a fragment of an Endoceras were also found by diligent search. 



The upper portion of the quajrry consists of alternating beds of limestone and shale, 

 the whole having a greenish gray color. The hmestone is much more impure and less 

 crystalline than that below, and of a less firm character. These beds, and more especi- 

 ally the associated shales, are quite fossUiferous. Among the species represented are 

 the following : 



Small spherical bodies (sponges?), Chcetetes lycoperdon, C. discoideus, a new species 

 of C. (branching form), Zaphrentis Cres. Streptelasma nmltilamellosum), Schizocrinus 

 nodosus? (large size column), Homocrinus, a new species of Stictopora, a new species of 

 Trematopora, a new species of Lingula, Crania scabiosa on Streptelasma, Orthis lynx, 

 0. plicatella? 0. testudinaria, 0. tricenaria, Streptorhynchus deltoideum, Sfrophomena 

 alternata, S. camerata, S. incrassata, Leptwna sericea, Zygospira recuvirostris, a new 

 species of Rhynchonella, Ambonychia radiata? Gypricardites (internal cast), TelUnomya 

 (internal cast) Euomphalus, Murchisonia helUcincta = M. Major, Bellerophon bilobu- 

 tus, Illcenus iaurus (pygidium), Calymene senaria, Harpes? (fragment of cheek spine), 

 Ceraurus pleurexanthemus. 



A specimen of Receptaculites Oweni was found in the rock pile, adjacent to the quar- 

 ries, and was believed to have come fi-om the upper layers. 



It will be best to reserve a discussion of the interesting facts here presented until the 

 data furnished farther north are before us, and while noting on the map the position 

 and stratigraphical relations of these quarries, pass on along the strike of the formation 

 to the vicinity of Neenah. 



About a mile southeast of this place, the rock comes to the surface and is quar- 

 ried to the depth of a few feet. Like the upper portion of the quarries at Oshkosh, 

 there is an alternation of impure Hmestone and shale. There is also present a coarse, 

 granulai- crystalHne rock of firmer texture than the remaining layers. The dip is irreg- 

 ular, varying from 8° downwards. Some layers, especiaUy the shaly ones, are quite fos- 

 siliferous. The following species occur here: 



Buthotrephis succulens, Graptolites, Chcetetes lycoperdon, and a new species having 

 a branching form, discs of Schizocrinus, plates of Crinoids, two new species of Tre- 

 matopora, two new species of Stictopora, a Ptilodictya, Ungula quadrata, Orthis lynx, 

 0. pectinella, 0. testudinaria, and a new species, Hemipronites Americanus, Strepto-^ 

 rhynchus deltoideum, Leptcena sericea (smaU one) Zygospira modesta; a new species of 

 Rhynchonella, an undetermined species of Ambonychia, and of Euomphalus, Raphis- 

 toma lenticularis (small), Helicotoma planulata, Murchisonia bellicincta, M. Gracilis, 

 Conularia Trentonensis, an Orthoceras, a C^jrtoceras, Leperditia fabidites, Illcenus 

 loivensis, I. taurus, Calymene senaria and Dalmania callicephalas. 



The facies of this fauna, as well as the nature of the beds, show a somewhat ^vide 

 departure from the character of the typical Galena Hmestone, and a close alUance mth 

 the Upper Blue beds of the Trenton; but the facts yet to be given will, it is beHeved, 

 justify the position to which they are assigned. 



Three miles north of this, in the town of Menasha (Sec. 11, E hf . of S. W. qr.), are two 

 quarries only a short distance apart, but owing to the irxegulaj: nature of the dip it is 

 not clear precisely what relation they sustain to each other. The quairy south of Mr. 

 Hunt's house consists of impure argiUaceous greenish blue Hmestone, alternating with 



