46 



ART. 2. — H. MATSUMOTO 



Astevoscheina glaiicuin Matsumoto. 



Asteroschema glaucum : Matsumoto, Proc. Acad. Nat. Sei. Philadelphia, 

 1915, p. 53. 



Three specimens; Dôketsuba, Sagami Sea; 110 fathoms. 

 Diameter of disk 11mm. Length of arms 100 mm. Width 

 of arms at base 4 mm. 



Disk five-lobed, the lobes being continued without any distinct de- 

 marcation into the arms ; flat, about as liigh as the arms, closely cover- 

 ed with very fine, smooth granules. Kadial ribs rather indistinct. In- 

 terbrachial ventral surfaces rather vertical, very narrow, forming a 

 deep notch, in which lie the two rather large, parallel genital slits. 

 Oral angles convex laterally and downwards, almost filling up the oral 



slits. Six or seven teeth in a 

 single vertical row, triangular 

 and stout. On either side of 

 the oral angle, there are seve- 

 ral flat, smooth, pavement-like 

 grains corresponding to the 

 oral papilla?. Sometimes a 

 few round smooth grains 

 occur below the teeth. 



Arms as high as wide, 

 very stout at the base, so 

 that the interbrachial spaces 

 ai^e very narrow below ; 

 distally rather slender and 

 higher than wide ; covered 

 with fine, smooth, close-set granules, of which there are about six 

 in 1 mm. on the radial ribs and the arm bases. Arm joints in- 

 distinct in the basal parts. First tentacle pore w^ithout arm 



Fig. 11. Asteroschema glaucum. x4. «. From above. 

 h. From below. 



