42 K. MITSUKURI : STUDIES ON 



maroccana Perriee, but the tables in that species of Pereier have 

 the disk showing either six holes only, or two or threc^ more 

 holes of the primary circle in addition, but never any outside that 

 circle. M. murrayi (Thkel) is also very near our species, but in 

 that species large lateral pedicels exist in a single row on the 

 outer edge of each lateral ambulacrum, other pedicels of the zone 

 being small. Besides, the shape of tlie spire of the tables is 

 different : it terminates in three long prongs garnished with teeth, 

 while in our species there is no sucli long prong. 



I believe, M. murrayi var. parva (Thkel) comes closest to 

 tlie present species, but the general configuration of the body in 

 that form is almost lozenge- shaped, while in t\io latter it is more 

 uniformly broad and longer. Moreover, the pedicels of the median 

 ventral surface are minute and almost invisible to the naked eye, 

 while in my species they are, although small, yet very distinct, 

 numerous and easily seen. Finally, the tip of the pillars in the 

 tables is provided with many teeth in parva, while in my species 

 it has generally only throe or often even a smaller number of teeth. 

 The color of the former species is said to be yellowish white, while 

 that of the latter is purple or violet. The present species is also 

 somewhat near il/, holothurioldes Sluiter, but that species has 

 the middle part of the ventrum entirely naked. 



There seems therefore nothing to do but to constitute this 

 into a new species. I therefore name the species for Dr. Bashford 

 Dean of Columbia University, New York, who joined us for a time 

 in the study of the fauna of Sagami Bay. 



