Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . with very firm longitudinal wavy lines,stauros linear reaching the margin (Kutzing). Inthe Microgcologie of Ehrenberg are many figures ofthis form, and Stauroneis Phcenicenteron; but, oncareful examination, it is not at all clear whatEhrenberg means. S. Phcenicenteron has fine trans-verse striae, and a slightly dilated stauros, but notthe wavy longitudinal lines. Ehrenberg, however,gives a figure of a form with a dilated stauros and distinct wavy lines, which he calls StauroneisPhce
Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . with very firm longitudinal wavy lines,stauros linear reaching the margin (Kutzing). Inthe Microgcologie of Ehrenberg are many figures ofthis form, and Stauroneis Phcenicenteron; but, oncareful examination, it is not at all clear whatEhrenberg means. S. Phcenicenteron has fine trans-verse striae, and a slightly dilated stauros, but notthe wavy longitudinal lines. Ehrenberg, however,gives a figure of a form with a dilated stauros and distinct wavy lines, which he calls StauroneisPhcenicenteron (Baileyi), (sic) ; thus mixing up thetwo species. Dr. Lewis at one time supposed thatthis was a sporangial variety of Stauroneis acuta;but from further observation he has come to theconclusion that Stauroneis Baileyi and Stauroneispteroidea arc interchangeable varieties of a com-mon species, probably Stauroneis Phoenicenteron.(Eig. 159), fig. b, under surface, showing a siliceousplate at the apex of valve ; fig. c, ideal section ofsame at d, showing vacant space between valve andplate. e^§? ~-~. b. Under surface. \~- c<^J Mi Fisr. 159. Stauroneis Baileyi(upper surface), x 400). Fig. 160. Stauroneislegumen, x 500. Stauroneis legumen (Ehr.), this form (fig. 160) isconsidered by Dr. Lewis to be an aberrant variety ofthe above species—not uncommon in this deposit. Eunotia septena (Ehr.), fig. 161, is a variety ofEunotia robusta. Eunotia camelus (Ehr.), fig. 162 ;this species varies much in outline, and is probablyonly Himantidium bidens. Eunotia bactriana(Ehr)., fig. 163; all the above are common in thisdeposit. 158 HARDWICKES SCIENCE-GOSSIP. [July 1,1867. Eunotia incisa (Gregory).—Valves arcuate, slender,with obtuse or subacute apices, and subterminalnotches or depressions on the ventral margin; striae
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