﻿ix, d. i Day: Ophiocephalus striatus 35 



(99), and transverse process (49). It is viewed from the an- 

 terior side in Plate XI. In Plate I the left side is shown. 



The 7th vertebra (94) from the last, in Plate XI, is viewed 

 from the posterior side showing the neural spine (43), neural 

 arch (126), and centrum (100). It is also seen, articulated, 

 from the left side in Plate I. 



The 6th vertebra (95) from the last shows the neural spine 

 (43, 125), prezygapophysis (127), and postzygapophysis (128). 

 This is viewed from the left side. Plate XI represents it from 

 the left side disarticulated, and Plate I, articulated. 



The 5th vertebra (96) from the last is viewed from the ante- 

 rior side in Plate XI, showing the centrum (101), the neural 

 spine (43), and the neural arch. Also, Plate I shows it, articu- 

 lated, from the left side. 



The last caudal vertebra but 4 (129) illustrated in Plate XII, 

 fig. 2, shows a neural spine (51), haemal spine (52), prezyga- 

 pophysis, postzygapophysis, anterior ventral process, and lat- 

 eral foramina, being seen from the left side. 



The last caudal vertebra but 3 (130) in Plate I and Plate XII, 

 fig. 2, shows the same parts as 129, but with much longer neural 

 (51) and haemal (52) spines. 



The last caudal vertebra but 2 (131) in Plate I and Plate XII, 

 fig. 1, shows the same structures as number 129, but the neural 

 and haemal spines arise from the middle and anterior portion of 

 the centrum of the vertebra. Also, there is a dorsal process on 

 the haemal spine a short distance from the centrum. This pro- 

 cess on the dorsal side of the haemal spine (52) helps to artic- 

 ulate with the detached haemal spine (52) of the last caudal 

 vertebra but 1 (132). The anterior side is illustrated in text 

 fig. 1. 



The last caudal vertebra but 1 (132) bears the neural spine 

 (51), prezygapophysis, and haemal spine (52), the last being 

 detached. This last contains the haemal arch within itself. In 

 Plate I this is seen in the articulated skeleton, and in Plate XII, 

 fig. 1, it is disarticulated, with the haemal spine (52) detached. 



The hypural vertebra (34) is the last vertebra, and articulates 

 with all of the hypurals except 102 and 103, dorsally, posteriorly, 

 or ventrally. Anteriorly it articulates with the next vertebra. 

 The posterior dorsal process receives the condyles of the 

 hypurals (53) in its deep ventral fossa. It bears prezyga- 

 pophyses (?) which extend dorsally, and the posterior ventral 

 process is at the extreme posterior ventral margin. Plate I and 



