352 CAMBRIAN BRACHIOPODA. 



Kutorgina cingulata Davidson [not (Billings)], 1871, British Fossil Brachiopoda, vol. 3, pt. 7, No. 4, pp. 342-343, 

 PI. L, fig. 25. (Discussed. Fig. 25 is copied from fig. 10 of preceding reference (p. 351) and erroneously referred 

 to in the description of PI. L as "Kortugina cingulata.") 



Oholella phillipsi Holl, Phillips, 1871, Geology of Oxford and the VaUey of the Thames, p. 68, Diagram XVII, fig. 12.. 

 (No text reference.) 



Obolellus ? phillipsi (Holl), Boembr, 1876, Lethaea geognostica, pt. 1, Lethsea palaeozoica, atlas, PI. II, figs. 6a-d. (No 

 text reference. Figs. 6a-d are copied from Davidson, 1866, PL IV, figs. 19, 17a, l7c, and 17b, respectively.) 



Oholella phillipsia Holl, Dall, 1877, Bull. U. S. Nat. Mus. No. 8, p. 41. (Mentioned as possibly belonging to an 

 undescribed genus.) 



Kutorgina cingulata Davidson [not (Billings)], 1883, British Fossil Brachiopoda, vol. 5, pt. 2, p. 212. (Characterized.) 



Kutorgina cingulata Walootx (in part) [not (Billings)], 1886, Bull. U. S. Geol. Survey No. 30, pp. 102-104. (Speci- 

 mens now referred to Micromitra (Paterina) phillipsi were included with the specimens representing Kutorgina 

 cingulata when this description was written.) 



Kutorgina cingulata phillipsi (Holl), Matley, 1902, Quart. Jour. Geol. Soc. London, vol. 58, pt. 1, pp. 145-147. 

 (Described and discussed as a variety.) 



Tlie original description by Holl follows : 



Semicircular, slightly broader than long; hinge-line straight, nearly equal to the greatest width of the shell. 

 Ventral valve prominent at the beak, depressed near the margin; beak small, roimd, pointed, and situated close to the 

 posterior margin. Dorsal valve evenly convex, slightly depressed at the angles; umbo obtuse. A slight mesial depres- 

 sion toward the anterior border in both valves. Surface marked with numerous moderately fine, sharply defined, 

 rather unequal, concentric striae, at about their own width apart. Length- of a large specimen one-fourth inch, width 

 one-third inch. 



The shell structure, where the outer layer has become exfoliated, is strongly punctate. 



Observations. — Davidson [186S, p. 312] refers this form to Kutorgina cingulata (Billiags) 

 under the belief that the American and English species occur at the same relative geologic 

 horizon. The American species, however, occurs in association with the Olenellus fauna. 

 With the identification of the tj^pes of Kutorgina cingulata (BiUings) and Kutorgina lahradorica 

 (Billings), the latter species being referred to Micromitra (Paterina), it is no longer possible to 

 refer Roll's species to Kutorgina cingulata, it being clearly congeneric with Micromitra (Paterina) 

 lahradorica. It differs specifically from that species in a more depressed ventral valve. 



The specific name was given in honor of Mr. J. Phillips. 



Formation and locality. — Upper Cambrian: (304g [Roll, 1865, p. 89]) Sandstones of the Eollyhush series, Mal- 

 vern Hills, between Herefordshire and Worcestershire, England. 



Lower Cambrian: (304c) "Malvern quartzite" at Raggedstone Hill; and (304d) "Malvern quartzite " at Mid- 

 summer Hill; both [Groom, 1902, p. 94] in the Malvern Hills, between Herefordshire and Worcestershire, England. 



Micromitra (Paterina) prospectensis (Walcott). 

 Plate II, figures 4, 4a. 



Kutorgina prospectensis Walcott, 1884, Mon. U. S. Geol. Survey, vol. 8, p. 19, PI. IX, figs. 1, la-b. (Described as a 

 new species. The specimens represented by figs. 1, la-b are ^edra^vn in this monograph, PI. II, figs. 4a and 4, 

 respectively.) 



Kutorgina prospectensis Walcott, 1886, Bull. U. S. Geol. Survey No. 30, pp. 106-107, PI. IX, figs. 3 and 3a. (Copies 

 original description and discusses species. Figs. 3 and 3a are drawn from the specimens figured by Walcott, 

 1884b, PI. IX, figs, la and 1, respectively.) 



Kutorgina prospectensis Walcott, 1891, Tenth Ann. Kept. IT. S. Geol. Survey, p. 610, PI. LXIX, figs. 4 and 4a. (Men- 

 tioned. Figs. 4 and 4a are copied from Walcott, 1886, PI. IX, figs. 3 and 3a, respectively.) 



Iphidea prospectensis (Walcott), Schuchert, 1897, Bull. U. S. Geol. Survey No. 87, p. 234. (Merely changes generic 

 reference.) 



Iphidella prospectensis Walcott, 1905, Proc. U. S. Nat. Mus., vol. 28, p. 307. (Merely changes generic reference.) 



Ventral valve subcorneal, moderately elevated. 



Dorsal valve moderately convex, the beak curving down to the posterior margin. The 

 character of the area and pseudodeltidium is unknown. The surface slopes gently from the 

 front to the highest point of the valve and arches down to the point of the beak. There is no 

 trace of a mesial sinus. The cardinal slopes diverge from the beak at an angle of about 170°. 

 Shell substance corneous. 



