H EXACT INELL1 DA. 
Spong. 25 
2. IIEXACTINELLIDA. 
A canthodictya , Hinde, diagnosis of genus, p. 47 ; f A. hispida, Hinde, 
Siluro-Cambrian, Metis, pp. 48 & 49, figs. 18 & 19, pi. iii, tig. 8 ; Dawson. 
Actinodictya/, n. g., for f A. placenta, n. sp. ; II all, p. 22, from Chem- * 
ung Group, Steuben County, N.Y. 
f Astrceospongia hamiltonensis , Meek & Worthen, Devonian of Macken- 
zie River Basin ; Whiteaves, pp. 197 & 198, pi. xxviii, figs. 1 & la. 
f Astrocladia elegans , p. 149, pi. vii,fig. 7, elongata , p. 148, pi. vii, fig. 6, 
rirguloides, p. 149, pi. vii, figs. 8a-c, Cambrian, Canada, Matthew (1), 
n. spp. 
Braehiospongia, Marsh, diagnosis and remarks on ; f B. digitata , Owen 
sp., Cincinnati Group, Kentucky ; James, pp. 66-68, fig. Q. 
Chirospongia, S. A. Miller, diagnosis and remarks on ; f C.faberi, S. A. 
Miller, Cincinnati Group, Cincinnati ; James, pp. 65 & 66. 
f Camcrospongia scliluteri , n. sp., Pocta, pp.225 & 226, taf. viii, figs, la, b, 
Padorborn. 
10. subrotunda , Mant., and C. sp., from Paderboru ; id. pp.225 & 226. 
f Coschmpora macropora, Goldf., p. 219, and C. sp., p. 30, Paderborn ; 
Poet a. 
f Graticidaria plicata , n. sp., Paderborn, Pocta, pp. 218 & 219, taf. vi, 
figs. 2a, 6, & taf. vii, tigs. 2a, b. \C. sp., Cretaceous, N. Bohemia ; Jahn, 
p. 482. 
kdryptodiclya, n. g., for f C. alien!, n. sp. ; Hall, p. 22, from Chemung 
Group, Steuben and Cattaraugus Counties, N.Y. 
* \ Cyathospongia quebecensis, Hinde; in Dawson, pp. 44 & 45, figs. 16 
& 17, pi. iii, fig. 7 ; C. (?) eozoica, Matthew, (2) pp. 42 & 43, fig. 1, 
Middle Division of Laurentian, St. John, N.B. : n. spp. 
' / Dichoplectella , n. g. for ID. irregularis , n. sp., Matthew, (1) p. 149, 
pi vii, fig. 9a, b, Cambrian, Canada. 
-f 'Dictyophyton sceptruni, vascellum , (Phragmodiclya) halli, and f D. toma- 
culum, from Chemung Group, Alleghany County, N. Y., f D. randalli, 
from Waverly Group, Warren, Pa., scitum , from Chemung Group, 
Chemung Narrows, N. Y., amalthcea from Chemung Group, Great Bend, 
Pa., Hall, p. 22 : n. spp. 
f Girvanella sp. from Lower Cambrian ; Walcott, p. 598, pi. liv, fig. 4. 
f Hyalostelia metissica , Siluro-Cambrian, Metis, Hinde ; in Dawson, 
pp. 49 & 50, fig. 20; III. minima, Cambrian, Canada, Matthew, (1) 
p. 150, pi. vii, fig. 10 : n. spp. 
f Leptomitus zitteli , Walcott, from Lower Cambrian ; Walcott, p. 597,. 
f Licmosmion folium, Rcem., from Paderborn ; Pocta, pp. 226 & 227. 
Lyssalcina : remains from Upper Callovian ; Wisniowski, pp. 261-263. 
. Pasceolus , Billings : diagnosis, p. 58 ; f P. globosus , Bill., p. 58, darwinii, 
Miller, p. 59; tP. (?) tumidus. James, pp. 59 & 60, fig. 3, Cincinnati Group; 
James. 
j- Pleurostoma, sp. indet., Cretaceous, N. Bohemia ; Jaiin, p. 482. 
