61 



larger conical teeth, with some very small ones at the symphysis, and a single 

 row of small conical teeth on the rest of the alveolar border. 



240. The dried head of a small Sparoid fish of the genus L> thrum*, Cuv. ; showing 



the preiuaxillary, mandibular and pharyngeal teeth. The anterior teeth on 

 both upper and lower jaws are laniariform, the posterior ones molariforiu. 

 both in a single row : l>ehind them are numerous minute M Hi form teeth. 

 The upper and lower pharyngeals present teeth 'en cardes'; those alwvc 

 curving backwards, those below, forwards. llnntrriaii. 



241. The interneural and denuoneural spine of a large Sparoid tish ; showing the 



peculiar interlocked or linked mode of articulation common to these part* of 

 the dermal skeleton in many other fishes. Hunt, mm 



242. The skeleton of a Mackerel (Scomber scomltrim) . The ribs are long and slen- 



der; the epipleural spines arc continued beyond the ribs from the basis 

 of the parapophyses, after these have bent down to form the ha?mal canal. 

 The number of abdominal vertebra; is 15 ; that of the caudal vertebra-, 16 : 

 total, 81. Mu*. South. 



243. The right half of the skull of a Mackerel (Scomber combru*), with the intvgu- 



ments and branchial arches ; showing the valvular fringe of long ciliated pro- 

 MBSc> In. in tin- concave -nlr "I" tlir tii^t an h. ami tin- tlc.iil.lr n,u ..I BBBntl Ij 

 dentated tubercles from the concave sides of the succeeding arches. The 

 rasp-like series of teeth on the upper pharyngeal bones are also well shown. 



244. The left half of the branchial arches of a Mackerel (Scomber scomonu). 



Hnnlfrian. 



245. The dried head of a Scomberoid fish (Trickiurvt). The maxillary and pre- 



mandibular teeth are compressed and lancet-shaped : the three vomerine 

 teeth have longer and stronger crowns, and are barbed posteriorly. The 

 integuments are preserved on this skull. 



Presented by Fr. Bennett, E*q., F.L.S. 



