UPPER LUDLOW GROUP. 
179 
Case and : 
Column of Reference to McCoy's Names and References; Observations, &c. Numbers and Localities, 
Drawers. 
Gf10 
Gg 
Gg2 
Gf9 

Gel0 
Gel0 
Gf9 
Gel0 
Gg 
Gel 
Gg2 
Gg3 
Geg4 
Gfs 

Gg2 
Gfl 
Gfl 
Synopsis: and Figures of Genera. 

Slimonia acuminata, with 
thoracic plate. 




Pterygotus, sp. 
Pterygotus bilobus, Salter (Mem. Geol. Surv., 
Mon. 1, Pterygotus, pl. 1, figs. 1—12, Silu- 
ria, 3rd ed. Foss. 26, fig. 1.) 
Pterygotus, sp. 
Pterygotus, fragment, probably base of swim- 
ming foot. 
Pterygotus perornatus, Salter, (Mem. Geol. 
Surv. Mon. I. Pterygogus, pl. 1, figs. 13—15.) 
Crustacean fragment. 
Slimonia acuminata, Salter (Pterygotus acumi- 
natus, Mon. Pteryg. pl. 2). The thirteen 
body-rings, including the long acuminate tail 
joint, the upper and under sides, antenne, 
palpi, metastoma or post-oral plate, the tho- 
racic plate (of male and female), and the 
swimming feet may be seen in the specimens. 
There is a large and nearly perfect specimen 
(b. 161) placed over the Woodwardian 
Cabinet. 
Slimonia, sp. new ? metastoma. 
BRACHIOPODA. 
Lingula, like LZ. lata, Sowerby. 
Lingula minima, Sow. (Sil. Syst. t. 5, fig. 23, 
Davids. Sil. Brach. t. 2, figs, 836—4+4). 

| b. 151, b. 152, Benson 
| Knott, large species. 
| b. 37, shews antenne and 
| jaws in place; b. 132, 
| antennz usually reversed; 
b. 148, b. 149, b. 150, shew 
the oval metastoma and 
chelate antennze; Lesma- 
hagow. 
b. 9, Benson Knott. 
b. 951, Benson Knott. 
b. 147, Lesmahagow. 

b. 952, Summer How, near 
Beck Mills, Kendal. 
b. 38, b. 39, Lesmahagow, 
Lanark; b. 142, b. 144, b. 
145, b. 146, shew thoracic 
plates ; b. 129, b. 131, shew 
the metastoma, long and 
narrow ; b. 143, the largest 
head known; b. 122, head 
of young specimen ; b. 123, 
b. 124, shew swimming 
feet and metastoma in situ; 
b. 122, a palpus, very large ; 
b. 126, shews all these and 
body, Lesmahagow. 
b. 130, Lesmahagow. 
b. 10, Benson Knott, Ken- 
dal. 
b. 957, Woolhope ; b. 958, 
near Ludlow. 

23—2 
