42 BULLETIN 73, UNITED STATES NATIONAL MUSEUM. 



tip expanded. A rounded inferior median ridge and very distinct oblique posterior 

 channels on under side of centrum. 



Charleston (female, jr.).— First lumbar: Similar to that of Barnegat skeleton, 

 but transverse process directed outward and scarcely or not at all forward; length 

 of process equal to that of centrum; tip rounded (due to immaturity). 



Tenth lumbar (last): Centrum very long. Neural arch and spine a little less 

 in height than length of centrum. Transverse process oblong, curved forward, more 

 than one-half as long as centrum. Metapophyses similar to those of Newport skele- 

 ton. Inferior median ridge very sharp; lateral channels rather indistinct. 



CAUDAL VERTEBRA. 



Barnegat City (female).— First caudal (vert. 28): Similar to last lumbar, but 

 neural spine broader antero-posteriorly. Transverse process § length of centrum, 

 inversely triangular, the tip much in advance of anterior face of centrum, free end 

 somewhat rounded. Metapojihyses similar to those of last lumbar. No median 

 inferior ridge, but two short processes bearing facets for chevrons posteriorly and a 

 very slight indication of similar process anteriorly, but without facets. Posterior 

 inferior oblique channels indistinct. 



Seventh caudal (vert. 34) : Centrum (exclusive of chevron processes) nearly as 

 deep as long. Neural arch and spine only a little higher than length of centrum, 

 very much inclined backward and expanded at distal end; free border of spine 

 straight. Metapophyses close to centrum, united nearly to tips by a horizontal 

 plate. A ridge extends backward from their tips nearly across the arch. Another 

 very prominent I'idge traverses the centrum at the base of the arch. At the poste- 

 rior end, a deep groove, convex forward, extends down the side of the centrum, mak- 

 ing an emargination in the transverse process and proceeding thence down the lower 

 side of centrum to its lower middle point, where it ends in a deep semicircular emar- 

 gination between the anterior and posterior chevron facets. Transverse process a 

 triangular stub, reaching nearly to the line of the anterior face of centrum. Chevron 

 processes very large, and the median inferior surface of the centrum between them 

 deeply grooved longitudinally. 



Tenth caudal (vert. 37) : Centrum as deep as long. Neural spine a low ridge, as 

 long as the centrum, and extending beyond it posteriorly. No transverse processes. 

 A foramen in side of centrum much above the middle and a similar one below. Close 

 to the latter and below it another foramen pierces the ridge uniting the chevron 

 processes, and appears below on side of longitudinal inferior median channel. 

 Metapophyses small mammelliform processes on top of centrum. 



Eleventh caudal (vert. 38) : No processes. A very small neural spine. Pos- 

 terior epiphysis strongly convex. 



Twelfth caudal (vert. 39) : A rounded mass without processes. 



Thirteenth caudal (vert. 40) : An oblong mass, with two grooves on each side, 

 two widely separate foramina above and two closely approximated below, entering 

 a common depression, with rounded projections on its borders. 



Fourteenth caudal (vert. 41): Similar to thirteenth caudal, but with a single 

 lateral groove. 



