PVA NONE: 103 
LINGULELLA FERRUGINEA Salter—Continued. 
Ficure ly. Cast showing part of the interior of a dorsal valve associated with the specimen represented by figure lu, 
The outlines of a pedicle groove were produced by accidental fractures in the shell. U niversity of 
Toronto. Specimen illustrated by Matthew [1892, Pl. XII, fig. 8c] as Obolella? gemmula. 
lw. Compressed ventral valve associated with Obolus refulgens in Locality 308, Upper Cambrian shales of 
Division C3c of Matthew’s section, Navy Island, St. John Harbor, New Brunswick. University of 
Toronto. 
2. Ventral ? valve from Locality 318h, Middle Cambrian shales at St. Davids, South Wales. Copied from 
Hicks’s figure [Salter and Hicks, 1867, fig. 2, p. 340] of Lingulella ferruginea ovalis. 
2a. Enlarged view of the valve represented by figure 2. Copied from Salter and Hicks [1867, fig. 3, p. 340]. 
2b. Ventral valves from Locality 318j, Middle Cambrian at Pen-y-pleidiau, St. Davids, South Wales. Copied 
from Salter’s figure [Salter and Hicks, 1867, fig. 1, p. 340] of Lingulella ferruginea.. It represents the 
type specimen. 
2c. Ventral? valve from Locality 318v, Upper Cambrian, Rhiwfelyn, North Wales. Copied from Davidson 
[1868, Pl. XV, fig. 7a]. 
2d. Ventral valve from Locality 318u, Upper Cambrian, Gwerny-y-Barcud, North Wales. Copied from David- 
son [1868, Pl. XV, fig. 6a]. 
2e. Distorted ventral valve from Locality 366b, Middle Cambrian at Porthclais Harbor, south of St. Davids, 
South Wales. Copied from Davidson [1871, Pl. XLIX, fig. 35a]. 
2f. Distorted ventral valve from Locality 318h, Middle Carabrian: Menevian shales at St. Davids, South Wales. 
Copied from Davidson [1871, Pl. XLIX, fig. 33a]. 
LINGULELLA BILLINGSIANA (Whiteaves) (p. 483). 
Figures 3 and 3a. Ventral valves, from Locality 314a, Upper Cambrian shales on Kelleys Island, Conception Bay, 
Newfoundland. Drawn from the type material in the Museum of the Geological Survey of Canada. , 
Whiteaves [1878, p. 226] did not figure the specimens on which he based his species. Figure 3a 
may be taken as the type. 
LINGULELLA Burtst Walcott (p. 484). 
Ficure 4, Dorsal valve, the type specimen, from Locality 90ce, Middle Cambrian Conasauga limestone near Kimbrel, 
Bibb County, Alabama, showing the slight median flattening of the surface and backward curvature 
of the concentric strie. U.S. Nat. Mus. Cat. No. 51779a. Copied from Walcott [1908d, Pl. VIII, 
fig. 6]. 
4a and 4a’. Exterior view and side outline of ventral valve from Locality 90b, Middle Cambrian Conasauga 
limestone near Woodstock, Bibb County, Alabama. U.S. Nat. Mus. Cat. No. 51778a. 
4b and 4b’. Partly exfoliated ventral valve associated with the shell represented by figure 4a, showing the 
cast of the ridges along the path of advance of the muscle scars on each side of the visceral area. 
U.S. Nat. Mus. Cat. No. 51778b. 
DELGADELLA LUsITANICA (Delgado) (p. 560). 
Ficure 5. Cast of the interior of a ventral valve, the type specimen. The marginal rim indicates the thickness of 
the shell. 
5a. Cast of the interior of a ventral valve. 
5b. Cast of a ventral valve. 
The specimens represented are all from Locality 351, Lower Cambrian shales at Monte de Valbom, northeast of 
Villa Boim, Province of Alemtejo, Portugal. The figures (5, 5a, and 5b) are reproduced from photographs sent to me 
by M. Delgado of the specimens figured by him [1904, Pl. LV, figs. 34, 31, and 32, respectively] under the name of 
Lingulepis lusitanica. Each of the views in this monograph is the reverse of the corresponding one given by Delgado. 
LINGULELLA DELGADOI WaALooTT (p. 491). 
Ficure 6. Cast of exterior of ventral valve, the type specimen. 
6a. Cast of interior of ventral valve. 
Figures 6 and 6a are reproduced from photographs sent to me by M. Delgado of the specimens figured by him 
[1904, Pl. IV, figs. 16 and 18, respectively] under the name of Lingulella granvillensis. 
Figure 6b. Cast of dorsal valve showing exterior surface. Reproduced from a photograph sent to me by M. Delgado 
of the specimen figured by him [1904, Pl. IV, fig. 27] under the name of Lingulepis acuminata meek. 
The view in this monograph is the reverse of that given by Delgado. 
6c. Cast of shell of dorsal valve partly broken away. Reproduced froma aetcerant sent to me by M. Delgado 
of the specimen figured by him [1904, Pl. IV, fig. 14] under the name of Lingulella cf. linguloides. 
The view in this monograph is the reverse of that given by Delgado. 
The specimens represented by figures 6, 6a-c are from Locality 351, Lower Cambrian shales at Monte de Valbom, 
northeast of Villa Boim, Province of Alemtejo, Portugal. 
