ESPECIALLY MYCTOPHOIDS 165 
The supracleithrum is stout and narrow and ventrally it articulates with the 
lateral face of the cleithrum, and is confined within a vertical groove. The cleithrum 
is a prominent sigmoid bone expanded lateral to the attachment of the endoskeletal 
girdle. The ventral part of the cleithrum curves forwards, and its anterior edge is 
bent medially. 
The endoskeletal girdle is indistinct, although the thickened saddle-shaped facet 
on the postero-dorsal region of the scapula, with which the first fin ray articulated, 
is clearly defined. The coracoid has a long slender anterior process which curves 
forwards to the anteriormost tip of the cleithrum with which it connects. The 
ventral edge of the coracoid projects posteriorly as a short pointed spine below the 
fin insertion. 
pt 
d.pt 
v.pt 
2mm 
Fic. 75. Pattersonichthys delicatus gen. et sp. nov. Pectoral girdle of the right side in 
lateral view. From B.M.N.H. number P.9976. 
The four radials articulate with the rear edge of the scapula, and the junction 
between the scapula and coracoid. Two prominent postcleithra are present ; 
the larger dorsal one articulates with the medial face of the posterior expansion of 
the cleithrum, the ventral postcleithrum is smaller and joined to the upper post- 
cleithrum dorsally and the pelvic bone ventrally. 
The pectoral fin consists of 13 rays of which the first is the longest, the remainder 
decreasing in size. All of the rays are segmented distally, and most of them appear 
to be branched. 
Pelvic girdle and fin. The pelvic bones are flattened, widest posteriorly and 
tapering to a point anteriorly. They contact each other in the mid-line in a long 
