246 



variation, three different sizes of anchors and anchor-plates. In the 

 anterior end there is but one size. The largest anchors in the posterior 

 end (Fig. 44. 5-6) measure ca. 700 // in length and 350 fn in width. 

 They are rather slender and have the arms serrate. The second 

 size of anchors measure ca. 350 fi in length and 200 // in width. 

 They are very like the large ones, but have not so many teeth on 

 the arms, The third sort of anchors do not measure more than 

 ca. 200 }i in length and 100 /* in width. They are as the two 

 larger ones, rather slender, but they have no more than 1 — 2 

 teeth on the arms. The anchors from the anterior end of body 

 (Fig. 44. 7) measure ca. 250 /u in length and 175 fi in width. They 

 are rather stout and have some few teeth on the arms. The plates 

 corresponding with the large anchors from the posterior end of body 

 (Fig. 44. 1) measure ca. 450 fi in length and 250 // in width. They 

 have ca. 15 large holes in the anterior end, and all the holes except 

 the articular hole are toothed. In the articular end there are 12 — 

 14 irregularly shaped smooth holes. Across the articular end there 

 is no well defined bridge, but the articulation with the anchors is 

 well developed and very like that of the plates in Protankyra. The 

 second sort of anchor-plates in the posterior end of body (Fig. 44. 2) 

 measure ca. 280 // in length and 180 // in width. They have ca. 

 9 — 12 toothed holes in the anterior end, and as the large plates 

 a well developed articulation. The third sort of anchor-plates from 

 this end of body (Fig. 44. 3) is very like the plates in some of 

 the Australian species of Leptosynapta. They measure ca. 160 jti 

 in length and 110// in width. They have usually seven large holes 

 in the anterior end, but there may often be some few small add- 

 itional ones. The articulation with the anchors is very faint or quite 

 undeveloped. The plates corresponding with the anchors from the 

 anterior end of body (Fig. 44. 4) measure ca. 200 // in length and 

 150 [I in width. They have normally 7 — 8 large toothed holes in 

 the anterior end, and 7 — 8 small smooth ones in the articular end. 



The large deposits are, as said, confined to the posterior 

 end of body, but it is very interesting to see that on the ventral 

 side of body, they are not found much more anteriorly than the 

 posterior fourth of the specimen, while on the dorsal side they are 

 found a little anterior to the middle. 



The miliary granules (Fig. 44. 10) are found all over the body, 



