323 



together in a bunch. When the stone was thrown over they would 

 squirt out the water from their bodies and then try to bore them- 

 selves down into the sand. The tentacles were strongly agglutin- 

 ating. When placed in a dish some of the specimens would rise 

 the foreend above the water and cling by means of the tentacles 

 to the sides of the dish. 



Explanation of Plates. 

 Plate II. 



This plate shows the very characteristic colour of some Synaptids. Figs. 

 1 — 5 are painted after specimens in alcohol, figs. 6 — 7 after living specimens. 

 As the colour is the same in the whole length of the body, only a small 

 part is shown of each species. 



Oph. lineata is the only one of the species here figured of which the 

 colour of the dorsal side differs from that of the ventral side. 



Fig. 1. Synapta oceanica (Lesson). Nat. size. 



Figs. 2 — 3. Opheodesoma lineata n. sp. Nat. size. — 2. The body seen 

 from the right side. 3. The body seen from the dorsal side. 

 Fig. 4. Synaptula albolineata n. sp. Nat. size. 

 Fig. 5. — ater n. sp. Nat. size. 



Fig. 6—7. — maculata (Sluiter). — 6. A complete specimen. Nat. 

 size. 7. A fragment of the body X 5. 



Plate III. 



Synaptula vivipara 0rsted (= hydriformis (Lesueur)). 



All the figures were drawn by A. S. 0rsted during his stay on Jamaica 

 in the year 1845; the name below is in 0rsted's handwriting. The en- 

 largement of the figures is not stated, but it may vary from X ca. 5 (the 

 two coloured drawings) to x ca. 200 (the figure of the ciliated funnels). 



The lowermost figure to the left of the plate represents some eyes and 

 their innervation. The figure above this represents a tentacle, situated off 

 the interstice between two adjacent pieces of the calcareous ring. 



The figures in the midline of the plate and the uppermost figure to the 

 left and right sides represent a series of developmental stages. In the two 

 latter figures are seen the larval organs (the punctured circles). 



The figure in the middle of the right side of the plate shows an opened 

 specimen with two rows of ciliated funnels and two club-shaped gonads. The 

 intestine is long and folded and has a large loop. Below, in the right side 

 of the plate, is a figure of the ciliated funnels and their arrangement on 

 the mesentery. 



9—11 — 1928. 



