— 219 — 



Plate VI. Peristedion cataphractuni. 



Fig. 55. Dorsal view of the skeleton of the head x 1V 2 - 



Fig. 56. Lateral view of the skeleton of the head x l x / 2 . 



Fig. 57. Dorsal view of the skull x 2. 



Fig. 58. Ventral view of the skull x 2. 



Fig. 59. Lateral view of the skull x 2. 



Fig. 60. Ventral view of the left laehrymal x 2. 



Fig. 61. Lateral view of the left hyomandibulo-palato-quadrate apparatus x 2. 



Fig. 62. Median view of the right hyomandibulo-palato-quadrate apparatus with the preopercular attached x 2. 



Fig. 63. Dorsal view of the parasphenoid x 2. 



Fig. 64. Lateral view of the same x 2. 



Fig. 65. Dorsal view of the left premaxillary x 2. 



Fig. 66. Dorsal view of the left maxillary x 2. 



Fig. 67. Posterior view of the skull x 2. 



Fig. 68. Diagrammatic view of the latero-sensory canals x l 1 /,. 



Plate VII. Dactylopterus volitans. 



Fig. 69. Dorsal view of the skeleton of the head, with the bones on the dorsal surface of the head filed down on 

 the right side, so as to show the course of the latero-sensory eanals x 1V 3 - 



Ventral view of the skull x P/a- 



Lateral view of the skeleton of the head x V-/ 3 . 



Ventral view of a part of the roof of the skull x l l / 3 . 



Posterior view of the skull with the bind ends of the extrascapulars, suprascapulars and supraoccipital 

 cut off x 2. 



Orbital view of the brain case x 2. 



Dorsal view of the right epiotic x 2. 



Cerebral view of the left proötic x 2. 



Dorsal view of the alisphenoid x 2. 



Ventral view of the alisphenoid x 2. 



Plate VIII. Dactylopterus volitans and T r i g 1 a h i r u n d o. 



Dorsal view of the parasphenoid of Dactylopterus volitans x 2. 



Dorso-mesial view of the right sphenotic and postfrontal x 2. 



Dorsal view of the left premaxillary x 2. 



Dorsal view of the left maxillary x 2. 



Dorsal view of the basioccipital x 2. 



Dorsal view of the right exoccipital x 2. 



Lateral view of the left hyomandibulo-palato-quadrate apparatus with the preopercular attached x l l / 3 . 



Median view of the left palatine x 2. 



Median view of the right hyomandibular x 2. 



Diagrammatic view of the latero-sensory canals of Dactylopterus x l l / 3 . 



Diagrammatic view of the latero-sensory canals of Trigla hirundo x 1. 



