285 



Rods in tentacles small or wanting, those of body uniformly spread 



over the skin uniserialis 



22. Size under 10 cm; occurs in Mangrove-svamps intermedia 



Size usually more than 10 cm, not in Mangrove-svamps . . . albatrossii 



Chiridota albatrossii Edwards. 



Chiridota albatrossii Edwards. 1907. The Holothurians of the North 

 Pacific coast of North-America, pag. 50 fig. 1 — 3. 

 „ „ Oh shim a. 1915. Report on the Holothurians 



collected by the United States Fisheries Steamer 

 •'Albatross", pag. 284. 

 Roxton Passage. 9. VI. 1915. 15—25 fms. Mud, stones. 4 specimens. 

 Nanoose Bay, Nanaimo. 15. VI. 1915. ca. 25 fms. Mud, stones. 1 specimen. 

 Nanaimo. 16. VI. 1915. ca. 70 fms. Mud. 34 specimens. 

 Str. of Georgia. 21. VI. 1915. ca. 200 fms. Mud. 21 specimens. 

 „ 7. VII. 1915. ca. 50 fms. Mud. 4 specimens. 



19. VII. 1915. ca. 200 fms. Mud. 4 specimens. 



Edwards writes that this species is difficult to preserve, and 

 in accordance therewith the larger part of Ohshima's specimens 

 were more or less fragmentary. It is therefore noteworthy that 

 all the specimens from Nanaimo 16. VI. are complete. All the other 

 specimens at hand are but fragments. All of them are rather small, 

 those from Nanaimo do not measure more than up to twelve cm 

 in length. They are in alcohol pale yellow with pure white wheel- 

 papillae and minute orange spots, irregularly scattered all over the 

 body and the tentacles. The wheel-papillae are found in a single, 

 rather regular row in each of the three dorsal interradii. On the 

 ventral side of body there are but a tew wheel-papillae which are 

 only found at the anterior end. The body-wall is in uncontracted 

 specimens rather thin and so translucent that the intestine as well 

 as the ciliated funnels may be seen through it. All the specimens 

 have 12 tentacles, specimens with 10 tentacles as mentioned by 

 Ohshima are not found. The calcareous ring consists of 12 

 pieces and all the radiais are perforated for the nerves. The shape 

 of the calcareous ring in the specimens from the Str. of Georgia 

 (Fig. 56. 7) is slightly different from that of the ring in the spec- 

 imens from Nanaimo 16. VI. (Fig. 56. 8). A cartilaginous ring is 

 wanting. There are 10 — 12 polian vesicles and a single stone- 

 canal. The shape of the madreporite is rather varying, but in all 



