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K. MITSUKUEI : STUDIES ON 



Psoliis (Cuvicna) sqiiamatus var, ? Théel 1886rA, pp. 89, 129, PI. XV., 

 figs. 1, 2, PL VI., fig. 2.— PPekrier 1904, p. 16. 



Psolus sqmimatus var. segregatns Pekp.ieu 1905, p. 59. 



Specimens examined : — 



Description : — " Body depressed. Lateral series of pedicels 

 composed of two to four rows. Odd ambulacrum always naked, 

 thougli it possesses some pedicels in its anterior and posterior 

 portions. Scales large, imbricating upon one another, with rather 

 uneven margin, and covered with fine granules only. The sole 

 devoid of tlie cup-shaped bodies is supported by more or less 

 scattered, irregular, reticulate, slightly spinous or knobbed plates " 

 (Theel 1886, p. 129). 



Remarks : — It is with some hesitation that I refer these speci- 

 mens to P. squamatus. As P. fahricii has been previously reported 

 from Japan (Bell 1882), I naturally expected to find that these 

 specimens belonged to that species, but although they look very 

 much like a specimen of that species from Massachusetts Bay in 

 North America, there is one fatal objection to identifying them 

 with P. fahricii. That is, the calcareous deposits of the sole are 

 entirely devoid of reticulate cups, and on the whole are much 

 like those figured by Théel as found in the sole of P. squamatus 

 (textfig. 42). Further, the agreement in other characters with the 



