IGO TRIGLID-E. 



f, g. Large specimens : stuffed. Frith of Forth. 

 h-l-. Adiilt : skins. England. From Mr. Yarrell's Collection. 

 I. Adult. Eiver Gotha, Sweden. From Mr. Lloyd's Collection. 

 m. Adult female : skeleton. River Gotha, Sweden. From Mr. 



Lloyd's Collection. 

 n,o. Very large specimens. Baltic Sea. From the Haslar Collection. 

 p. Very large specimen : skeleton. 

 q. AdiUt. 

 r,s. Half-grown. 

 t. Half-grown. 

 u. Adult: stuffed. 

 V. Intestines of specimen m. 



Skeleton. — The greater part of the upper sui'face of the skull is 

 formed by the principal frontal bones, which have a crescent-shaped 

 incisui'e on the side for receiving the eye. The space between the 

 eyes is concave, and its width is two-thirds of the distance between 

 the upper posterior angles of the orbits ; these angles are indicated 

 by a striated protuberance of the bone. The crown of the head is _ 

 very broad and flat ; an obtuse ridge runs fi-om the protuberance men- 

 tioned to the insertion of the suprascapula, and separates the crown 

 from the lateral parts of the head ; a similar transverse ridge crosses 

 the supraoccipital. A part of the ethmoid, which is intercalated 

 between the frontal bones, is quite free ; anterioi'ly it is bifurcate. 

 The turbinal bones are armed with a spine ; the palatine bones 

 oblong, toothless. The vomer is anchor-shaped ; its anterior arms 

 are provided with a band of vUliform teeth, bent at an obtuse angle ; 

 its posterior part is broad anteriorly, and tapers posteriorly into an 

 obtuse point. The basisphenoid is flat beneath, very long, reaching 

 nearly as far forwards as the vomer ; there is no pit between the 

 basioccipital and the basisphenoid. The basal portion of the brain- 

 capsule is slightly convex, broad, and depressed. 



The upper maxillary bone is rather elongate, styliform anteriorly, 

 and spatuliform behind ; it has no supplementary bone. The inter- 

 . maxillary is one-third shorter ; its posterior margin is slightly 

 flattened and produced ; each posterior process is divided into two, 

 namely into a broad, oblong, exterior part, and a longer interior 

 one which is pointed. The dentary bone of the mandibula is deeply 

 forked ; only the inferior part is joined to the articular, the superior 

 being quite free. The articular bone is composed of tlu'ee i^rocesses : 

 the middle and longest joius the dentaiy, the two others being free ; 

 the one is styhform and points upwards, the other is broad and di- 

 rected downwards. Tlie dentary, like other bones of the skull, has a 

 muciferous channel, as in a great many — more or less in all — Acan- 

 thopterygii, and therefore not a peculiarity of the Cottoids. 



The infraorbital bridge is formed by three oblong fiat bones with 

 several mucous pits. The opercles are composed merely of ridges, 

 terminating in, or armed with, spines ; the connecting bony parts 

 between the ridges are feeble and thin. 



Each OS innominatum is composed of three laraeUse, the inferior of 



