104 ASTERIIDAE. 



similar. The difference in appearance is due to the more erect position of the 

 spines in the smaller specimen and to the greater abundance of pedicellariae 

 in the larger. The latter also has much more tapering arms. 



The species is one of the best characterized in the genus for the development 

 of primary spines on so many abactinal plates, accompanied as it is by the total 

 absence of small spines, gives a very easily recognized facies. There is httle 

 doubt that pera7-matus is more closely allied to fulgens and diomedeae than is 

 any other one of the eastern Pacific Zoroasters. 



Zoroaster magnificus. 



LuDWiG, 1905. Mem. M. C. Z., 32, p. 159. 



There is a fine large Zoroaster in the present collection, R = 270 mm., 

 r = 15 mm., which has been labeled by Ludwig as Z. magnificus. It answers 

 well to the description except in one particular ; the spinelets covering the body 

 are thick and blunt and even when di-y are not in the least " sabelformig " as 

 they are described in magnificus. If this difference is anything more than of 

 degree, it might be of considerable importance but as I have no available speci- 

 men of magnificus for comparison, I attribute it to indi\ddual diversity merely. 



station 4647. Eastern Tropical Pacific, 4° 33' S., 87° 42' 30" W., 2,005 fms. Bott. temp. 35.5°. Lt. gy. 

 and br. glob. oz. 



ASTERIIDAE. 



Heliaster cumingii. 



Asterias (HeUaster) cumingii Gray, 1840. Ann. Mag. Nat. Hist., 6, p. 180. 

 Heliaster cumingii Dujahdin and Hope, 1862. Hist. Nat. Zooph. Ech., p. 343. 



These two specimens, measuring about 200 mm. across, were taken in 

 January, 1905, at Chatham Island, Galapagos, a locahty from which the species 

 has long been known. One has thirty-six and the other thirty-eight rays. 



Heliaster multiradiatus. 



Asterias {Heliaster) multiradiata Gray, 1840. Ann. Mag. Nat. Hist., 6, p. 180. 

 Heliaster multiradiatus Dujaedin and Hvvt, 1862. Hist. Nat. Zooph. Ech., p. 343. 



There are two specimens of this species, taken with the preceding. One 

 has R = 65-70 mm. and the other has R = 75-80 mm. Each has twenty-six 

 rays, nearly the maximum number for the species. 



