262 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
4838 Xanthopsis bmckmanni Meyer. Plesiotypes. 
Nummulitic (Eocene). Sonthofen, Germany. 
Meyer, Palaeontographica, vol. 10, pt. 3, July, 1862, 
p. 152, pi. 16, fig. 5-11. 
4919 Xanthopsis kressenbergensis Meyer. Holotype. 
Nummulitic (Eocene). Kressenberg, Germany. 
Meyer, Palaeontographica, vol. 10, pt. 3, July, 1862, 
p. 156, pi. 16, fig. 12-14. 
4840 Xanthopsis sonthofensis Meyer. Holotype. 
Nummulitic (Eocene). Sonthofen, Germany. 
Meyer, Palaeontographica, vol. 10, pt. 3, July, 1862, 
p. 159, pi. 18, fig. 7-9. 
Arachnida. 
4101 Clubiona eseri Heer. Holotype. 
Molasse (Miocene). Oeningen, Switzerland. 
Heer, Urwelt der Schweiz, 1865, p. 356, fig. 213. 
Insecta. 
8497 Gerephemera simplex Scudder. Holotype. 
Devonian. “Fern Ledges,” I^ancaster, New Brunswick. 
Scudder, Geol. mag., vol. 5, 1868, p. 174; Anniv. mem. 
Boston soc. nat. hist., 1880, p. 12, pi. 1, figs. 8, 8a 
(reverse) ; Foss. ins. No. Am., 1890, pp. 164, 276, pi. 7, 
figs. 8, 8a (reverse). 
8495 Lithentomum harttii Scudder. Holotype. 
Devonian. “Fern Ledges,” Lancaster, New Brunswick. 
Scudder, Can. nat., ser. 2, vol. 3, 1867, p. 206, fig. 4; 
Geol. mag., vol. 4, 1867, p. 387, pi. 17, fig. 4; Anniv. 
mem. Boston soc. nat. hist., 1880, p. 22, pi. 1, fig. 3; 
Foss. ins. No. Am., 1890, pp. 174, 278, 305, pi. 7, fig. 3. 
8496 Platephemera antiqua Scudder. Holotype (reverse) 
Devonian. “Fern Ledges,” Lancaster, New Brunswick. 
Scudder, Can. nat., ser. 2, vol. 3, 1867, p. 205, fig. 2 
