202 



intestine has a loop and on the mesenteries there are ciliated fun- 

 nels of the usual size and shape. 



The anchors (Fig. 27. 1) measure ca. 330 ^ in length and 200 fi 

 in width. The stock is finely dented and on the vertex there are 

 some minute knobs. These latter are usually arranged in a single 

 group placed on the vertex itself, but in many of the anchors they 

 are found on one of the sides of the vertex. The anchors as well 

 as the anchor-plates are in both ends of the fragment of the same 

 size and shape, but abnormal ones may occur (Fig. 27. 4). The 

 anchor-plates (Fig. 27. 2) measure ca. 230 // in length and 170 ^ 

 in width. The articular hole is usually smooth, but the anterior 

 margin of it may have some few large teeth. The bridge is uneven 

 and often united with the sides of the articular hole. In the posterior 

 end of the plates there are thiee very small holes. The miliary 

 granules (Fig. 27. 3) are only found in the white stripes in the 

 ambulacra. The minute granules are often arranged in more or 

 less complete circles. 



This species is distinctly different from all other species of the 

 genus. It is characterized by the dark colour with the five white 

 stripes and by the shape of the calcareous deposits. 



Synaptula violacea n. sp. 



Koh Sarlak, Gulf of Siam. 16. III. 1909. Coral-blocks. One fragment. 



The fragment at hand is in the exterior quite like a fragment 

 of Chiridota violacea Johs. Müller, but the presence and the 

 shape of anchors and anchor-plates, proves that it is a Synap- 

 tula. The peculiar colour and the shape of the anchors and plates 

 separate it from all the known species of the genus, and as these 

 characters may be sufficient for characterizing the species, it will 

 be the better course to describe it as an independent species. 



The fragment measures 3 cm in length and 2 cm in diameter. The 

 colour is uniformly brownish-purple. The intestine has a loop and on 

 the mesenteries there are ciliated funnels of the usual size and shape. 



The anchors (Fig. 27. 5) measure ca. 320 /a in length and 190 ^ 

 in width. The stock is finely dented and on the vertex there are 

 minute knobs. The anchor-plates (Fig. 27. 6) measure ca. 210 ^ 

 in length and 180 ^ in width. The anterior margin of the articular 

 hole is serrate, and on the thick bridge there are large teeth. In 



