CID. — LAS.] 



PROTOZOA. 



667 



keokuk, B. grandis, B. wortheni, B. wood- 

 mani, B. hsecklei, B. hyatti, B. alicei, and 



B. palmata are named, with almost char- 

 acterless descriptions, without illustra- 

 tion. 



Cidarospongia, Gurley, 1884, New Carb. 

 Foss. Bull., No. 2, p. 4. Round hemi- 

 spherical bodies, with flattened irregular 

 base, full hemispherical top or dome, 

 which, along the margin, is distinctly 

 divided into twelve lobes, being quite 

 regular in size and extending fully one- 

 half the distance from the margin to 

 the center of the dome, where they be- 

 come obsolete, leaving a smooth, slightly 

 depressed, central, circular area, whose 

 diameter is about one-half that of the 

 body. The top of the dome is punc- 

 tured by two well-defined circular open- 

 ings, which are situated close together, 

 and at the margin of the smooth cir- 

 cular area. During growth the dome 

 becomes elevated, and a lower or basal 

 portion becomes developed, extending 

 from the flattened base to the margin 

 of the dome. This lower portion is 

 somewhat irregularly marked by con- 

 centric lines of growth. The sides, be- 

 low the dome, are moderately straight. 

 Type C. ella. Described at the same 

 place, from the Coal Meas. 



Cryptozoon steeli, Brainard & Seely, 1890, 

 Bull. Am. Mus. Nat. Hist., vol. 3, p. 6, 

 Calciferous Gr. 



Cryptodictya alleni, Hall, 1892, 9th Ann. Rep. 

 State Geologist, p. 60, Chemung Gr. Not 

 entitled to recognition for want of illus- 

 tration. 



Cucumulites, Gurley, 1884, New Carb. Foss. 

 Bull., No. 2, p. 2. Body consisting of a 

 thin, punctate, elongate, tubular shell, 

 which is slightly arcuate and expand- 

 ing; being closed and rounded at the 

 larger extremity and somewhat pointed, 

 with a well-defined terminal or oral 

 opening at the smaller extremity. Sur- 

 face ornamented by more or less nu- 

 merous pointed elevations or tubercules, 

 which along the central portion of the 

 shell become arranged in longitudinal 

 rows, breaking up and becoming irregu- 

 lar in crossing the larger rounded end 

 and toward the smaller extremity. Type 



C. tuberculatus. Described at the same 

 place with C. tricar- 

 inatus from the War- 

 saw Group. 



Cyathophycm silvriana, 

 James. Too poorly 

 defined to be recog- 

 nized. 

 Cyathospongia quebec- 

 ensis, Dawson & 

 Fig. 1195. — Cyclo- Hinde, 1889, Trans, 



spongia discus. Roy. Soc. Can., vol. 



Lower side. ?< ' ^ Up Tac ' onic< 



Cyclospongia, S. A. Miller, 1891, Advance 

 Sheets 17th Rep. Geo. Sur. Indiana, 

 p. 5. [Ety. kuklos, a circle ; spongia, 



sponge.] Sponge, circular, button-shaped 

 or discoid, and consisting of numerous 

 thin, calcareous laminae, having a con- 

 centric structure and filled with minute 

 canals or interstices. The structure has 

 some resemblance to that of Strephochetus 

 richmondense, but the laminae are much 

 thinner, and the interlaminar spaces are 

 much less marked, 

 and no vertical tubes 

 have been found with- 

 in them. That was a 

 free sponge ; this one 

 is supposed to have 

 been attached to 

 some other object. 

 Type C. discus. De- 

 scribed in the same Fig. 1196. — Cyclo- 

 place, from the Up- spongia discus, 

 per Helderberg Gr. Upper side. 



Dictyophyton amalihea, D. halli, D. randalli, 

 D. sceptrum, D. scitum, D. tomaculum, D. 

 vascellum, Hall, 1892, 9th Rep. State 

 Geologist, N. Y., pp. 56 to 58, Chemung 

 Gr. Such descriptions, without illus- 

 trations; are not entitled to recognition. 



Halichondrites, Dawson, 1889, Trans. Roy. 

 Soc. Can., vol. 7, p. 52. Oval or irreg- 

 ular masses of small simple spicules, 

 imbedded in patches of pyrite, and, 

 without any definite arrangement or 

 root, spicules may indicate the pres- 

 ence of a halichondroid sponge. In the 

 best preserved specimens the spicules 

 appear to be biacerate and more slender 

 and pointed than in Lasiothrix, and they 

 seem to be in two series, inclined at a 

 very oblique angle to each other. In 

 some specimens elongated spaces, with 

 well-defined margins, are covered with 

 thin films of pyrites, which may have 

 resulted from the replacement or in- 

 crustation of a mass of minute spicules, 

 of which traces remain in some places. 

 He observed that sponges having origi- 

 nally much keratose or other dense 

 animal matter, would naturally aggre- 

 gate in and around themselves a greater 

 quantity of pyrite than those of a more 

 purely siliceous character. Type H. 

 confusus. Named at the same place, 

 from the Upper Taconic. 



Hyaloslelia metissica, Hinde, 1889, Trans. 

 Roy. Soc. Can., vol. 7, p. 49, Up. Ta- 

 conic. Founded upon a confused mass 

 of supposed spicules. 



Lasiothrix, Hinde, 1889, Trans. Roy. Soc. 

 Can., vol. 7, p. 50. [Ety. lasios, shaggy ; 

 thrix, hair.] Sponge small, depressed 

 oval in outline, the outer surface cov- 

 ered by a layer of longitudinally ar- 

 ranged, apparently simple, acerate spic- 

 ules; beneath this is another layer of 

 spicules disposed transversely. From 

 the base of the sponge several simple 

 elongated spicules extend. Type L. 

 curvicostata. Described in the same 

 place, from the Upper Taconic. L. 

 flabellata is also described. 



