THE SESAMOID ARTICULAR 35 



THE BATHYMASTERIOffi. 



Bathymaster signatus. 

 The sesamoid articular is here essentially as in Trichodon. 



THE URANOSCOPIDJE AND TRACHINID^. 

 Uranoscopus scaber, Trachinus radiatus. 



The large sesamoid articular is broadly attached against the ecto- 

 steal plate with its lower surface resting on the endosteal process and 

 Meckel's cartilage. 



THE BLENNIOID FISHES. 

 Lumpenus anguillaris, Cebedichthys violaceus, Ziphidion mucosum. 



The sesamoid articular is large and attached closely to the ectosteal 

 plate, resting at its lower edge on Meckel's cartilage, and sometimes on 

 the endosteal process ; in Lumpenus it rests equally on the cartilage and 

 process ; in Cebedichthys it is only slightly in contact with the process ; 

 in Ziphidion it is remote from the process. 



Heterostichus rostratus. 



In this the sesamoid articular is small and against the ectosteal plate 

 remote from the endosteal process, while Meckel's cartilage covers its 

 inner surface. 



Anarrichthys ocellatus. 



This has the sesamoid articular situated as in Lumpenus, but it is 

 much larger, roughly elliptical in outline, and very thick, with its thick- 

 ness extending to its edges. 



THE ZOARCIDJE. 

 Lycodopsis pacificus, Lycodes brevipes. 



The sesamoid articular is long and rather thick. It is wedged in 

 between the ectosteal plate and Meckel's cartilage, extending up, however, 

 considerably above the latter. Its posterior end extends a little behind 

 the anterior end of the endosteal process. 



