84 



ventral transverse rods, while in the present state of preservation it pas- 

 ses at a distance above these rods. The band along the dorsal side is 

 straight and simple; there is no indication of vibratile lobes or epaulets. 

 No indication of pigmentation is seen. The oral area is very wide as in 

 species a, the mouth opening remaining uncovered. The rectum and anal 

 opening are not to be distinguished. Nothing can be discerned of the 

 enterocoel or hydrocoel. 

 The skeleton (Fig. 32). The postoral rods are of the same character as 



ptr Ptr 



Fig. 32. Skeleton of EchinopMeus transversus, species c. A. from the dorsal, B. from tlie 



ventral side. ^m/^. Letters as in fig. 30; furtiier: dtr. dorsal transverse rod; pd. postero- 



dorsal rod; ptr. posterior transverse rod. 



The left anterolateral rod is broken and pushed some way backwards (Fig. A). 



in species a, fenestrated, with rather large holes; they are set with some 

 few small thorns in the lower part, entirely smooth in the outer part. 

 The body rod is short, smooth ; the point bent a little outwards, apparently 

 somewhat widened; it appears to be finely fenestrated, or perhaps only 

 irregularly serrate — this cannot be definitely ascertained in the side view 

 presented by the single specimen at hand. But, at any rate, it is clear 

 that there is some adaptation for the attachment of the abductor muscle. 

 The ventral transverse rod is short, robust, with a simple, straight point. 

 The ventral recurrent rod is short, bifurcating, one branch going along 

 with the body rod and perhaps uniting with it at the point — this cannot 

 be definitely ascertained, but it looks so — the other branch, the sup- 



