STI. STR.] 



MOLLUSCOIDA. 



325 



striata, Hall, 1887, Pal. N. Y., vol. 6, p. 

 246, Ham. Gr. 



subcarinata, see Taeniopora subcarinata. 



subrigida, Hall, 1884, Rep. St. Geol., p. 43, 

 Ham. Gr. 



sulcata, Winchell, 1866, Rep. Low. Penin. 

 Mich., p. 92, Ham. Gr. 



tenera, Billings, 1865. (Ptilodictya tenera,) 

 Catal. Sil. Foss. Antic., p. 36, Anti- 

 costi Gr. 



trilineata, Hall, 1887, Pal. N. Y., vol. 6, p. 

 243, Ham. Gr. 



triserialis, see Acanthoclema triseriale. 



tumulosa, Hall, 1887, Pal. N. Y., vol. 6, p. 

 246, Ham. Gr. 



vanclevei, Hall, 1883, 12th Rep. Ind. Geol. 

 and Nat. Hist., p. 268, Niagara Gr. 



variabilis, Prout, 1866, Trans. St. Louis 

 Acad. Sci., vol. 2, p. 413, Up. Held. Gr. 



vermicula, Hall, 1887, Pal. N. Y., vol. 6, 



p. 93. Up. Held. Gr. 



STICTOPORELLA, Ulrich, 1882, Jour. Cin. Soc. 

 Nat. Hist., vol. 5, p. 152. [Ety. diminu- 

 tive of Stictopora.} Distinguished from 

 Stictopora by interstitial pits between 

 the longer diameters of the cell aper- 

 tures. Type S. interstincta. 



angularis, Ulricli, 1886, 14th Rep. Geo. 

 Sur. Minn., p. 71, Trenton Gr. 



?basalis, Ulrich, (in press,) Geo. Sur. 111., 

 vol. 8, pi. 68, 69, and 75, Keokuk Gr. 



FIG. 520. Stictoporella interstincta. Natural 

 size and magnified 18 diam. 



cribrosa, Ulrich, 1886, 14th Re'p. Geo. Sur. 



Minn., p. 69, Trenton Gr. 

 frondifera, Ulrich, 1886, 14th Rep. Geo. 



Sur. Minn., p. 72, Trenton Gr. 



FIG. 521. Stictoporella interstincta. 



interstincta, Ulrich, 1882, Jour. Cin. Soc. 



Nat. Hist., vol. 5, p. 169, Utica Slate Gr. 

 ? undulata, Ulrich, (in press,) Geo. Sur. 



111., vol. 8, pi. 69, Kaskaskia Gr. 



STICTOPORINA, Hall, 1887, Pal. N. Y., vol. 6, 

 p. xx. [Ety. diminutive of Stictopora.] 

 Zoarium obtusely pointed at the base, 

 enlarging above and becoming flattened ; 

 bifurcations, few ; cells tubular arising 

 from a mesotheca ; apertures oval ; in- 

 terapertural space elevated, angular, 

 inclosing the apertures in rhoinboidal 

 or polygonal areas. Type S. claviformis. 



claviformis, Hall, 1881, (Trematopora 



claviformis,) Trans. Alb. Inst., vol. 10, 



p. 181, and Pal. N. Y., vol. 6, p. 269, 



Ham. Gr. 



Stictotrypa, Ulrich, (in press,) Geo. Sur. 111., 



vol. 8. Syn. (?) for Stictopora. 

 STOMATOPORA, Bronn, 1825, System d.urwetl. 

 Pflanzenthiere. [Ety. stoma, mouth ; 

 poros, perforation.] Zoarium adnate ; 

 cells in single branching series, mouths 

 elevated, and at the end of the tubular 

 cells. Type S. dichotoma. 



alternata, Hall & Whitfield, 1873, 23d Rep. 

 N. Y. St. Mus. Nat. Hist., p. 235, Che- 

 mung Gr. 



auloporoides, Nicholson, 1875, (Alecto 

 auloporoides,) Ohio Pal., vol. 2, p. 267, 

 Hud. Riv. Gr. 



confusa, Nicholson, 1875, ( Alecto confusa,) 

 Ohio Pal., vol. 2, p. 267, Hud. Riv. Gr. 



frondosa, Nicholson, 1875, (Alecto fron- 

 dosa,) Ohio Pal., vol. 2, p. 266, Hud. 

 Riv. Gr. 



inflata, Hall, 1847, (Alecot 

 inflata,) Pal. N. Y., vol. 

 1, p. 77, Trenton and 

 Hud. Riv. Grs. 



nexilis, James, 1875, 

 (Alecto nexilis,) Int. to 

 Catal. Cin. Foss., p. 3, 

 Hud. Riv. Gr. 



pertenuis, Ulrich, 1886, 

 (Rhopalonaria perten- 

 uis,) 14th Ann. Rep. 

 Geol. Sur. Minn., p. 59, FIG. 522.-Stoma- 

 rn t p topora inflata. 



irentonljr. Natural size 



proutana, S. A. Miller, and magnified 

 1882, Jour. Cin. Soc. Nat. 

 Hist., vol. >, p. 39, Hud. Riv. Gr. 

 STREBLOTRYPA, Ulrich, (in press,) Geo. Sur. 

 111., vol. 8, p. 403. [Ety. streblos, turned 

 about ; trupa, an opening.] Ramose, 

 slender, solid ; cells radiating trom an im- 

 aginary axis, their primitive portionlong, 

 tubular ; or from a linear axis when 

 they are somewhat shorter; inferior 

 hemisepta best developed, situated 

 rather far down ; apertures regularly 

 elliptical, or somewhat truncated at the 

 posterior margin, surrounded by a 

 slight peristome and. within this, some- 

 times a narrow sloping area ; arranged 

 usually in rather regular longitudinal 

 series ; back of the aperture, occupying 

 the depressed front of the cell, there 

 are from one to twelve or more small 

 pitp, which, when numerous, are ar- 

 ranged in two or three rows; small 

 acanthopores occasionally present. Type 

 S. nicklesi. 



22 



