bo 
LOWER CAMBRIAN. 

Case and | 
Column of) 
Drawers. | 
Reference to McCoy’s 
Synopsis: and Figures of Genera. 

Gh 
(Glass 
case). 
Gh 
| 
| yet known. 


Arenicolites. 
Trilobites. 
(Low Entomostraca. The 
parts of the mouth are not 
Name derived 
from the trilobed form.) 

Plutonia. 

Lingulella. 
Names and References; Observations, &e. 
Oldhamia 
D081, 

radiata, 
figs. 3—5, 8—10). 
Forbes (Kinahan, 1. ec. 
This has no 
stem, and is probably a distinct genus from | 
the last, which has been termed Murchiso- 
nites antiquus by Géppert in his “ Flora 
| der Silurische und Devonische Schichten.” 
| ANNELIDA (Worm tracks and burrows). 
| Arenicolites sparsus, Salter (Quart. Geol. 
Journ. Vol. xu. pl. 5, fig. 2). The minute 
exit- and entrance-holes of the burrows 
of marine worms on rippled sand surfaces. 
_Arenicolites didymus, Salter, ib. Vol. xi. | 
Mouths of burrows close and parallel. 
Scolecites. 
the worm, are common in Cambrian rocks 
(Mem. Geol. Surv. Vol. m1. 243, fig. 2). 
Rain-imprints, on a peculiar muddy layer, sun- 
cracked and largely rippled, have been found 
| in more than one locality in the Longmynd 
| (Quart. Geol. Journ. Vol. xt. pl. 5, fig. 1). 
CRUSTACEA Trilobita. 
Lately discovered by Dr. Hicks, of St. David's. 
Conocoryphe Lyelli, Hicks (Quart. Geol. Journ. 
1869). For remarks on genus, see p. 5. 
Plutonia, n.g. Sedgwickii, Hicks. 
Paradowides, but as yet undescribed. It has 
a narrow glabella, broad ribs (plewra, which | 
are the first leg-joints), and a tubercular 
surface. Hicks (1868), Brit. Assoc. Reports. | 
Leperditia (or Primitia?) prima, Hicks. 
Paradoxides Harknessi, Hicks MS. See p. 6. 
Microdiscus sculptus, Hicks MS. See p. 4. 
Agnostus cambrensis, Hicks. (Page 4 for genus.) 
MOLLUSCA. 
Discina, sp. See p. 5. 
Obolella, sp. See p. 6 for the genus. 
Lingulella ferruginea, Salter. This and its var. 
ovalis ran down at least 1200 feet into the 
red rocks of the Harlech Group. Quart. Geol. 
Journ. 1867, Vol. xx11. p. 340, fig. I—3. 
Theca, sp. See p. 6. 
Burrows, filled up with excreta of | 

Very like | 

Numbers and Localities. 
a. 630, a. 631, Longmynd 
group of Bray Head, Wick- 
low.—(Also from Irish Sur- 
vey.) 
a. 9, Longmynd, Shrop- 
shire. Under surface of 
beds. (Presented by Mr. R. 
Lightbody, and Mr. Salter.) 
b. 257, Yearling Hill, Long- 
mynd. (Pres. by Mr. Salter.) 
a. 1, Yearling Hill, Long- 
mynd. (Presented by Mr. 
Lightbody.) 
a. 471, a. 475, St. David’s, 
400 ft. down in the Har- 
lech Group. (Dr. Hicks.) 
a. 472, a. 473, a. 474, same 
locality. (Presented by Dr. 
Hicks.) 
a. 283, St. David’s. (Dr. 
Hicks.) 
a. 286, do. do. 
a. 285, do. do. 
| These species are in Dr. 
| Hicks’ Cabinet. 
a. 284, St. David's. 
Hicks.) 
(Dr. 
