PLATE V. BRACHIOPODA. 
1. Linnarssonia transversa, Hartt. Dorsal valve. Mag. ? a. Anexam- 
ple partly exfoliated, showing the forked median furrows, and median 
ridge ending in a rhombic protuberance, also showing the print of the 
muscles near the hinge b. Side view of the same ——c. View 
from behind. . See p. 125. 
2. Linnarssonia transversa, Hartt. Ventral valve. Mag. 2 a. Anexam- 
ple partly exfoliated, showing the apical boss, foramen and pit of the 
cardinal muscle b. Same, side view ——c. Same seen from behind. 
All from Hanford Brook. See p. 125. 
3. Lingulella (?) inflata, Matt. Mag. + a. Ventral valve 
in profile. From Div. 1, 6, 7, Hanford Brook. See p. 127. 
4. Lingulella (?) inflata, var. ovalis, n. var. Mag. ¢ a. Ventral valve 
b. Apex enlarged to show mould of boss around the pedicle tube 
c. longitudinal section of this valve. From Div. 1, b, 1, Hanford 
Brook. See p. 127. 
5. Aecrotreta gemmula, Matt. Mag. 42 a. mould of the ventral valve, 
showing apical boss, foramen and arched ridges (crescent) around the 
interior of the valve b. Interior of dorsal valve, showing median 
septum and two pairs of scars ; the margin of the valve is revolute 
e. Ventral valve seen from behind, showing the area and the foramen 
opening under the break d. Side view of the same. From Div. 
1, b, 3, Hanford Brook. See p. 126. 
6. Acrothele Matthewi, Hartt. Mag. ? a. Interior of the dorsal valve 
showing the mesian ridge, trifid in front where the central muscles were 
attached ; also showing pits of the cardinal muscles b. The-same 
in profile. From Div. 1, d. 
7. Acrothele Matthewi, Hartt var. prima. Mag. 7 a. Ventral valve show- 
ing foramen near margin. From Div. 1, }, 3, Hanford Brook. 
8. Acrothele Matthewi, var. lata. Mag. ? a. Interior of ventral, anterior 
and lateral margins revolute ; two pits in front of the foramen, and four 
minute ones close to the hinge ; foramen more central. From Diy. 1, J, 
3, Hanford Brook. See p. 128. 
9. Acrothele Matthewi, var. costata, n. var. Mag. ¢ Ventral valve show- 
ing ridges and foramen. From Div. 1, }, 2, and 5, Hanford Brook. 
See p. 128. . 
10. Orthid. Small, indeterminable, dorsal valve. From Div. 1, }, 7, Han- 
ford Brook. See p. 128. 
b. Same 
