spiniform processes in, 78.
striata, 330.
Strophomena, 231, 245, 252, 395.
absence of puncte in deltidium of,
260.
of straight hinge-line in young,
268.
deltidinm of, 386.
dorsal beak in, 264.
Paterina-like stage in, 268.
pedicle-opening in, 241.
rhomboidalis, 322.
teeth in, 252.
Strophomenacea, specific differentiation
in, Schuchert, 96.
Strophomenide, 387, 394.
absence of embryonal sinus in, 388.
cardinal area of, 390.
deltidial development in, 393.
hinge, fissure, and callosity in, 333.
Strophonella, 245, 387.
semifasciata, 315.
striata, 315, 327.
discussion of, 330.
groove in, 333.
hinge in, 333.
Stygina, 146.
fixed-cheeks in, 127.
Stylonurus, tail spine in, 84.
Suessia, 246.
INDEX


symmetry, radial, application of law of,
to Brachiopoda, 236.
law of, Haeckel, Jackson,
Korshelt, Heider, 236.
Symphoria, 156.
accessory lobes in glabella of, 157.
Symphysurus, 146.
Syringopora, 425, 426.
erect growth in, 427.
Syringothyris, 246.
high hinge-area in, 266.
F


tachygenesis, 128.
taxolophus stage, 277.
Technocrinus spinulosus, spines in, 50.
Telephus, 142.
Telotremata, 242, 247, 260, 282.
defined, 245.
tendrils, 88.
Terataspis, 70, 150.
extremes of spinosity in, 56.
glabella in, 150.
Terebratalia, 288, 292, 299, 301, 303, 306,
308.
adult loop in, 291,
cistelliform stage in, 408.
coreanica, adult characters of loop
in, 295.
condition in, 299.
Jrontalis, adult characters of loop
in, 295.
condition in, 299.
gwyniform stage in, 408.
Marie, 299.
new genus, 297.
obsoleta, 297, 407, 409.
adult condition in, 299.
development of, 298, 406.
lophophore in, 280.
metamorphoses of, 407.
septum in platidiform stage of,
409.
spitzbergensis, 299.
adult characters of loop in, 295.
stage in Macandrevia and Dallina,
299.
transversa, 297.
adult characters of loop in, 295.
condition in, 299.
INDEX 633


tentacles in, 275. transversa, 291.
trocholophus stage in, 278. Whitfieldella, deltidial plates in, 391.
Terebratella, 231, 238, 246, 294, 295, 296, | Terebratule, 411.
