﻿ASTER0LEPID2E. 221 



48163. Trunk and portions of head and tail, ventral aspect, in 

 counterpart. The displaced " os duhium " is shown, and 

 one of the orbital plates is exhibited in the dorsal opening 

 of the head. Purchased, 1877, 



49189. Small individual with imperfect head and tail, ventral 

 aspect, in counterpart. The left extra-lateral plate is seen 

 displaced ; the expansion of the pectoral appendages is 

 distinct; and two or three of the dorsal ridge-scales upon 

 the tail are exhibited. Purchased, 1878. 



50107. Imperfect head and trunk, ventral aspect, in counterpart, 



shown, of the natural size, in PI. VI. fig. 4. In the 

 orbital opening, the " os dubium " (p.) and the two 

 orbital plates are exhibited. The left pectoral append- 

 age displays the characteristic distal expansion. 



Purchased, 1879. 



50108. Crushed individual, wanting extremities of appendages, 



ventral aspect. The tubercular ornamentation of the 

 ventral plates is well shown in impression. 



Purchased, 1879. 



50112. Imperfect crushed trunk with right pectoral appendage, 

 remains of the head, the greater portion of the tail and 

 dorsal fin. Purchased, 1879. 



P. 657. Two imperfect specimens, ventral aspect, one displaying 

 the left pectoral appendage. Egerton Coll. 



P. 6071. Ventral plates of trunk, fragments of left pectoral appen- 

 dage and tail. Presented by F. Harford, Esq., 1889. 



P. 4038. Trunk 0-035 in length, with portions of appendages and 

 tail, ventral aspect, in counterpart, probably young of this 

 species. Purchased, 1883. 



(iii.) Tynet Burn. 



37781. Much crushed trunk, ventro-lateral aspect, showing left 

 pectoral appendage and fragments of head and tail. The 

 tubercular ornameutation is well displayed. 



Purchased, 1863. 



35979. Large specimen, ventral aspect, doubtfully of this species. 

 The displaced mental plates are seen from their concave 

 visceral aspect ; the internal transverse ridge upon the 

 anterior ventro- laterals is distinct; and the tubercular 



