NO. 12 PERMIAN BRACHIOPODS FROM OREGON—COOPER 55 
Measurements in mm. 
Length Width Thickness 
ESOC on hc Oe ca wih cinched oe ee eae 18.6 20.9 17.8 
Pararype CI25300) 5. eee tees. eee 19.1 22.8 19.0 
e GE2Z5303)) 6 kis St eee 16.5 19.2 14.5 
« (taveorat Aste syste arte 11.8 13.8 0.4 
‘s (125300))io- oe eos ae ae ee 10.6-+ 12.4 9.6 
Types —Holotype, U.S.N.M. 125392; figured paratypes, U.S.N.M. 
125388, 125389, 125390, 125391a, 125393, 125552; unfigured para- 
type, U.S.N.M. 125391b. 
Localities —613, 636, 637, 638, 639; F; L8; P10; S20, S39, S4o, 
$45, 546, S49, S56, S87, S103; U.O. 2201-1, 2202-2, 2204-1. 
Discussion.—This is the largest species of Rhynchopora yet found 
in the United States. It is coarser ribbed than large specimens of 
either R. illinoisensis (Worthen) or R. carbonaria (McChesney). 
Rhynchopora taylori, best-known species from the Permian, is a 
smaller shell with a narrower fold and sulcus. In the Oregon species 
the fold and sulcus occupy most of the anterior part, the flanks being 
small and restricted. None of the numerous specimens of Rhyncho- 
pora from the Leonard and Word formations of the Glass Mountains 
approaches R. magna in size or in the strength of the costation. 
RHYNCHOPORA sp. 
Plate oB, figures 11-14 
The specimen illustrated is probably an aberrant specimen of Rhyn- 
chopora magna Cooper, new species, which may have, because of 
unfavorable or unusual conditions, attained adulthood without ever 
growing to normal size. Adult characters in this specimen appear 
in the long tongue of the pedicle valve and the great depth of the 
brachial valve. 
Type.—Figured specimen, U.S.N.M. 125387. 
Localities —S49, S103; U.O. 2201-4. 
Suborder SPIRIFEROIDEA Allen, 1940 
Superfamily SprriFERACEA Waagen, 1883 
Family SPIRIFERIDAE King, 1846 
Subfamily AMBocoELIINAE George, 1931 
CRURITHYRIS sp. 1 
Plate 1G, figures 13-18 
Longer than wide, maximum width at about the middle, lateral 
margins narrowly rounded; anterior margin truncate. Anterior com- 
missure faintly sulcate. Surface smooth. 
