2 J 8 



II. MAtSUMOÏO : AS-TKQPlilURA KAWAMURAI. 



the absence of a central boss on the primary plates ; in the very 

 regular-shaped and much narrower dorsal arm-plates ; in the much 

 smaller and rather inconspicuous madreporic shield ; in the longer 

 adorai shields ; in the somewhat narrower oral plates, the two in inter- 

 radial pairs being in contact with each other to a less extent ; in the 

 saddle-shaped ventral arm-plates ; and finally in the free arms being much 

 narrower. Again, this species differs from ClIUN 's Astrophiura,* 

 which has not yet been specifically named, chiefly in the smaller and 

 regular-shaped infrabasals ; in the narrower basais and interradiais; 

 in the elevated infrabasals, basais and interradiais; in the absence of a 

 central boss on the primary plates ; in the much narrower dorsal arm- 

 plates ; and in the much narrower free arms. The Astropliiura sp. just 

 referred to seems to stand somewh.it nearer to the genotype than to 

 the present species. 



*CHUN, Aus den 'Icifcn des Weltmeeres, ujco, p. 488, fig. Ditto, 2tc Aufl., 1903, 

 1>. 171, fig. 



Explanation of Plate 111. 



Tig. 1. Astrophitira kawamurai viewed from above, x 6. 

 Fig. 2. Ditto viewed from below. X 6. 



