121 



processes on the radial pieces are ringformed for the passage of 

 the nerves. The polian vesicles as well as the small madrepore- 

 canals are numerous. The gonads are branched. The intestine has 

 a loop and on the mesenteries there are small cup-shaped, ciliated 

 funnels. 



The anchors (Fig. 5. 15) measure ca. 280 /u in length by ca. 

 190 ft in width. The stock is branched and on the vertex there 

 are minute knobs. The anchor-plates (Fig. 5. 1) measure from 220 

 to 250 ^ in length by 180 — 185 jtv in width. The articular end 



Fig. 4. Pieces of calcareous ring of Oph. mauritiae 1, Oph. serpentina 2, 

 Oph. variabilis 3, Oph. clarki A, Oph. glabra 5, Oph. spectabilis 6, Oph. grisea 7. 1—3 



& 5-7 x 6; 4 X 16. 



is in this species of a rather constant shape: Across the large hole 

 is a bridge, which is united with the plate in four places, and the 

 holes in the posterior margin are of nearly equal size. The large 

 holes in the plates are distinctly dented with large rounded teeth, 

 which for the most are found in two rows on the exterior surface 

 of the plate. 



Miliary granules, in the shape of rosettes, are found all over 

 the body as well as in the tentacles and in the oral disk. In the 

 oral disk there are furthermore small, smooth rods. These are often 

 a little curved and swollen at the ends (Fig. 5. 14). In the specimen 

 at hand such rods are totally wanting in the tentacles. 



In general appearance this specimen is very like the following 

 species glabra, and the body-wall is, as it is stated to be in the 

 latter species, thick and smooth. But the size and shape of the 

 anchors and anchor-plates as well as the peculiar shape of the 



