88 



W. LlLLJEBORG, 



length of d:o, exclusive of epiphysis, 3|"; height of corpus in front 6"; height 

 of vertebra to top of processus spinosus 10}"; length of processus spinosus 

 3"; d:o of processus trans versi 3§-"; distance between external borders of 

 processus mammillares o\". 



The next of the discovered vertebrae or that which we take to be the 

 4 th caudal vertebra (PI. IX. figg. 82, 83) is, as we have already said, 

 similar to the 2 nd , the only deviations being that it is rather smaller, has 

 less lateral processes and a smaller foramen spinale. The concavity on 

 the under side of the corpus, and on the sides beneath the lateral processes 

 is more marked. The articular areae for processus spinosi inferiores are 

 more distinct, and from the outer side of both there extends inwards towards 

 the under side of the vertebra a ridge more distinct on this than on the 

 second. Dimensions of this vertebra: Breadth of corpus 7|"; height of d:o 

 in front G"; length of d:o without epiphyses 3~"; length of processus spi- 

 nosus 2-f-"; d:o of processus transversi 3|"; breadth of d:o 2.}"; distance 

 between external borders of processus mammillares 3}". 



The vertebra which we take to be the 6 th caudal vertebra (PI. IX. 

 figg. 84 — 85) presents generally the same form as the last, with the same 

 form and the same direction forward and downward of the lateral processes, 

 but differs sensibly from it by its smaller lateral processes, processus spi- 

 nosus, and foramen spinale, and by its thicker and more separated pro- 

 cessus mammillares. The transversal groove formed by the concavity below 

 and at the sides of the corpus is deeper and narrower than in the precee- 

 diug. Above the lateral processes there is also on the sides of the corpus 

 a deep concavity between the anterior and posterior borders. Dimensions 

 of this vertebra: Breadth of corpus in front 7]"; height of d:o d:o 6-|"; 

 length of d:o, exclusive of epiphyses, 3-|"; length of processus spinosus 2"; 

 d:o of processus transversi 3J-"; breadth of d:o 2"; distance between external 

 borders of processus mammillares 4|". 



Between the last described vertebra and that which follows there is 

 so considerable a difference in the size of the processes, that they cannot 

 possibly have been contiguous, and we are obliged to assume, that there 

 has been a vertebra between them 1 ), whence it follows that we take the 

 vertebra represented in PI. IX. figg. 86 — 87 to be the 8 th caudal ver- 

 tebra. It is immediately evident that its processus spinosus is much lower, 



') It should here he remarked, that the gap hetween these vertebrae (figg*. 

 84 — 86 and 85 — 87) has unfortunately, by an oversight, not been observed in the fi- 

 gures, where they have been placed in coutact. 



