219 
ASTEROLEPIDiR. 
Agassiz, op. cit. pi. i. fig. 4. The trunk is seen from the 
ventral aspect, but its correct outline is apparently de¬ 
stroyed. Eyerton Coll. 
P. 3208 a. Second type specimen of P. cancriformis , figured ibid. 
fig- 5. Enniskillen Coll. 
34987-89. Two large specimens exhibiting the tail, and one small 
specimen. Purchased, I860. 
35047. Imperfect large specimen ; Stromness. Purchased , 1860. 
38731-32. Small specimen and portion of larger individual. 
Purchased , 1865. 
41998. Comparatively well preserved specimen, ventral aspect, 
showing displaced mental plates ; Stromness. 
Purchased, 1870. 
P. 660-2. Small distorted specimen and two more imperfect larger 
examples ; Belyacreugh. Also a fragment, with pectoral 
appendages, from Eamna Gio. Eyerton ColL 
P. 3208. Two specimens, ventral aspect. Enniskillen ColL 
Pterichthys oblongus, Agassiz. 
[Plate V. fig. 10; Plate YI. figs. 3, 4.] 
1844. Pterichthys oblongus, L. Agassiz, Poiss. Foss. vol. ii. pt. i. p. 302 
(name only). 
1844. Pterichthys oblongus, L. Agassiz, Poiss. Foss. V. G. E. p. 18, 
pi. iii. figs. 1, 2. 
1848. Pterichthys oblongus , Sir P. Egerton, Quart. Joum. Geol. Soc. 
vol. iv. p. 313. 
1855. Pterichthys oblongus , F. M'Coy, Brit. Palasoz. Foss. p. 600. 
1888. Pterichthys oblongus , E. H. Traquair, Geol. Mag. [3] vol. v. 
p. 509. 
Type. Imperfect trunk and tail, ventral aspect; Elgin Museum. 
Inferior surface of carapace long and narrow, sides nearly straight; 
tail shorter than the trunk. Pectoral appendages less than two 
thirds as long as the trunk, the distal segment considerably ex¬ 
panded. 
Form, Loc. Lower Old Eed Sandstone : Banffshire, Nairnshire, 
and Cromarty. 
(i.) Gamrie. 
28856 a. Imperfect specimen, ventral aspect, in counterpart. 
Purchased , 1854. 
