220 



visible on the body surface. The ciliated funnels are, as in the other 

 species, found on the body-wall in the usual interambulacra, but there 

 is found only one sort (Fig. 32. 12) though of different sizes. They 

 are funnel-shaped and opened in the side. There is only one 

 sort of anchors. They measure ca. 130 [i in length and 80 fju in 

 width, and are rather slender (Fig. 32. 9), with the arms distinctly 

 toothed. The anchor-plates (Fig. 32. 11) are of very varying 

 shape, and usually they are more or less reduced in the articular 

 end, being then rather like the plates in Labidoplax. They measure 

 ca. 110 jti in length and 80 fi in width. In the body there are two 

 different sorts of rods, one in the ambulacra and one in the inter- 

 ambulacra. Those in the ambulacra (Fig. 32. 15) are bent or chela- 

 shaped rods of the usual size. They are lying very densely and are 

 arranged in two distinct rows. The rods in the interambulacra 

 (Fig. 32. 13) are lying more scattered and never in rows, nor are 

 they confined to the papillae. They are larger than the rods in the 

 ambulacra and their outline is distinctly undulating. Their ends are 

 often enlarged, faintly branched and perforated. The rods in the 

 digits (Fig. 32. 16) are long and slender and distinctly different 

 from the shorter and thicker ones in the tentacle-stem (Fig. 32. 17). 

 All the rods in the tentacles and the digits are of the same size 

 as the large rods in the interambulacra, and have as these the out- 

 line undulating. 



Leptosynapta transgressor differs, besides in the number of the 

 tentacles, distinctly from all the hitherto known species, in the 

 shape of the calcareous deposits. 



Leptosynapta roxtona n. sp. 



Roston Passage. 9. VI. 1915. 15—25 fms. Mud and stones. 3 fragments. 



These three fragments differ in the shape of the anchors and 

 anchor-plates so much from all the hitherto known species, that I 

 have no doubt in describing them as a new species. They measure 

 0,5 — 1,5 — 3 cm in length, and their colour is pale yellowish-grey. 

 In the longest fragment there is a little piece of gonad present. It 

 contains only sperma, but whether eggs are really wanting or not, 

 cannot be ascertained as the rest of the gonad is lacking. On the 

 body-wall there are some few ciliated funnels. There is only one 

 sort very like the funnels in transgressor (Fig. 33. 5). 



