96 ESCHRICHT AND REINHARDT 



as its left lateral surface, turned forwards and upwards ; and which, in fig. 1, Plate V, is indicated 

 by the same sign ; above v" and v the left arched lateral surface will be seen, which joins the 

 palatine and superior maxillary bone. In the right half of the cranium, (Plate V, fig. 1,) this 

 surface had mostly disappeared by the sawing through of the vomer, by which means a fairer 

 view had been gained into the great cavity of the bone (w — v) adapted for the cartilaginous 

 primordial vomer ; in the woodcut it will be seen, on the contrary, how this great cavity 

 in its posterior part, first (from jo to u) is continued in a narrower and flattened pit, in which the 

 anterior, sphenoid is placed, and then (from u to ii) gradually loses itself in an extremely slight 

 groove in the hindmost, flattened, horizontal end of the vomer, which covers the inferior surface 

 of the posterior sphenoid. The posterior edge of the vomer (o), which is quite thin, joins 

 the anterior part of the basilar portion of the occipital. The lateral margins are placed 

 in their most anterior part in contact with the intermaxillaries, and in the middle with the 

 maxiUaries. Above the septum of the nasal canals, where they are very broad and rough, they 

 are united with the palatines (near p), and in their entire posterior extent [u — u) with the 

 pterygoids. Those parts which are covered by the vomer from below, namely, the primordial 

 vomer and both sphenoids, consisted still in this unborn individual of one single cartilage, without 

 traces of its being divided into several pieces, and into which the basilar part of the occipital, 

 adjoining behind, and the ethmoid, placed above, were also included. 



To illustrate more fully the internal stracture of the cranium of the Greenland whale, as far 

 as it appears after having been sawed through vertically in the mesial line, we shall here insert 

 the interpretation of aU the letters employed in fig. 1, Plate V. 



A. The cerebral cavity. 



B. The orbit. 



C. The nasal opening. 



JD. The glenoid articulation. 

 a. The articular process of the temporal. 



c. The anterior parts of the turbinated bones {concliæ nasi) of the nasal canals. 

 e. The ethmoid. 

 /. The frontals. 



f. Processus orhitalis ossis frontalis. 

 h. The hook of the pterygoid [Jiamulus pterygoideus). 

 i. The intermaxillary. 

 i . The surface of the part of the intermaxillaries bounding the nasal cavity {superficies 



nasalis ossis intermaæillaris). 

 h. The right condyle of the occipital. 

 m. The superior maxiUary. 

 m'. The lateral prolongation of the superior maxillary [processus orhitalis ossis 



maxillaris superioris) . 

 m". A thin and hollow plate of the superior maxillary, joining that wall of the canal 



for the optic nerve which is formed by the frontal. 

 m. The palatine process of the superior maxillary. 



rø". The surface of the superior maxillary bounding the nasal canal {superficies nasalis 

 ossis maxillaris). 



