172 



two sizes of anchors are rather alike, only the smaller ones have 

 a little shorter arms. The third size of anchors (Fig. 19. 9) are ca. 

 150 ^ in length and 80 // in width, and differ from the two others 

 in the shape of the arms and of the vertex. All three sorts of 

 anchors have the stock finely dented and have minute knobs on 

 the vertex. The anchor-plates (Fig. 19. 10-12) measure - 1 ) 240 fi x 

 180 [i, 2 ) 140 fi x 120 ft, 3 ) 120 fi x 100 fi. The articular hole 

 is in the two small plates quite smooth, but in the largest one it 

 has the anterior margin serrate. The bridge has in all three sorts 

 of plates some faint knobs and in the posterior end they have three 

 small holes. The miliary granules (Fig. 19. 13) are circles of minute 

 granules, scattered all over the body and in the tentacles. 



This species differs in the shape of the anchors and anchor- 

 plates, as well as in that of the calcareous ring, distinctly from all 

 the other species of the genus, and is seemingly not closely related 

 to any of the species known. 



Synaptula virgata (Sluiter). 



Chondrocloea virgata. Sluiter. 1901. "Siboga"Holothurien. PI. 128, p. If. 5. 

 Synaptula virgata. Clark. 1908. The Apodous Holothurians. pag. 85. 

 Amboina, Innerbay. 18. III. 1914. Sand. Coral. 2 specimens. 

 The Kei Islands. Off Toeal. 14. IV. 1922. Sand, ca. 20 m. 2 specimens. 

 50 57S. 106° 34 E. Java See. 7. VIII. 1922. Sand, shells, 22 m. 1 specimen. 



The very characteristic colour of this species, makes it easily 

 recognizable, and there is in my opinion no doubt that the spec- 

 imens from Amboina Innerbay are the same species as SI u iter's 

 Chondrocloea virgata. The specimens from St. 19 and St. 116 differ 

 from the Amboina-specimens in having black pigment arranged in 

 fine stripes in the skin. Also on the calcareous ring there is black 

 pigment, for which reason I suppose that it is of pathological nature. 

 Besides in having black pigment the mentioned specimens differ 

 from the Amboina-specimens in having numerous abnormal anchor- 

 plates (Fig. 20. 5 & 9). Possibly these specimens will ultimately 

 prove to represent a distinct species. For the present however, it 

 would seem the better course to refer them to 5. virgata, with which 

 species they are at any rate, closely related. 



The largest specimen from Amboina measures 23 cm in length 



