92 Edwin Chapin Starks. 



to the exterior posteriorly tliroiigli an elongate foramen, at the anterior 

 end of which is a slight cavity in the parasphenoid indicating the 

 chamber that is developed at this place in the Thnnnin?e. 



The exoccipitals meet broadly above the basioccipital and have 

 very large condyles, which slope normally over the basioccipital ; 

 they are each nearly as big as the basioccipital condyle. The condi- 

 tion of the opisthotic is as described for Scomberomorns. The vomer 

 has an obliqne articular facet on each side for attachment to the 

 maxillary. The prefrontal is a much swollen bone broadly meeting 

 its opposite fellow at the median line behind the ethmoid; it is 

 pierced l)y the olfactory nerve. The palatine is attached to the pre- 

 frontal and the ethmoid as described under Scomber. The ethmoid 

 is a thick Avide bone forked or concave in front to receive the blunt 

 premaxillary processes; its most anterior part is not at all posterior 

 to the front of the vomer. The alisphenoids reach forward nearly 

 to the prefrontals, and meet each other at their anterior ends above 

 the opening to the brain case, but do not at all obstruct the opening. 



The suborbital ring is incomplete. The nasals are thick, wide 

 bones attached for their full length to the frontal and ethmoid and 

 do not at all project beyond the latter. The symplectic from the 

 outer surface of the skull appears to be long and cylindrical, but 

 behind the metapterygoid and quadrate it spreads out to a broad trian- 

 gular shape, and is attached to the inner surface of the metaptery- 

 goid by a deeply dentate suture. It extends downward in a channel 

 in the quadrate. The auxiliary maxillary is well developed, and 

 the premaxillary teeth are large and set in alveoli. The third and 

 fourth superior pharyngeals have such a deep constriction between 

 them on each side that they can no longer he said to fonn a single 

 plate as in Scomber. The other head liones do not differ materially 

 from those of the Thunninse. 



The shoulder girdle is essentially as in Scomber, l)ut the pelvic 

 girdle differs in having the subvertical plate below the horizontal plate 

 turned outward, and a similar plate developed above the horizontal 

 plate. 



There are 45 vertebrse ; it is impossible to distinguish abdominal 

 from caudal vertebrse in the specimen at hand, as the ribs and anal 



