26 



NATURAL HISTORY BULLETIN 



Bahamas: Little Cat Island. 4 small specimens, 16-25 mm. in 



diameter, with banded spines 50 mm. long. 

 Bahamas : Eleuthera Island, Spanish Wells, 2 adults. 

 Bahamas: no definite locality, 1 adult. 



No locality label. 5 small specimens, 10-18 mm. in diameter, 

 with banded spines, 22-30 mm. long. 



Arseosoma fenestratum 



Calveria fenestrata Wyville Thomson, 1872. Proc. Eoy. 8oc. London, SO, 

 p. 494. 



Asthenosoma hystrix A. Agassiz, 1883. Blake Ech., pis. XIII and XIV. 

 Araeosoma fevestratum Mortensen, 1903. Ingolf Ech., pt. 1, p. 52. 



Plate IV, Fig. 2 



In the ''Narrative" (p. 173), there is an interesting account 

 of the capture of an adult specimen of this remarkable sea- 

 urchin on the Pourtales Plateau in 105 fms., which is referred 

 to as ''the largest sea-urchin secured during the entire cruise." 

 "This specimen was seven inches across the test and was 

 swollen out, when it came on deck, to the regulation out-line of 

 a sea-urchin." It was soon discovered "that it was not an ani- 

 mal to be handled with impunity, as its spines, although small, 

 were exceedingly sharp and inflicted a wound so painful as to 

 suggest some poisonous properties. The specimen was of a dull 

 vinaceous color." 



A photograph of this specimen, now 6 inches in diameter and 

 2 inches high, has been sent me but I have not seen the speci- 

 men. I have no doubts however of the identification. 



There is, in the collection before me, a very young ech- 

 inothurid, labelled " Phormosoma placenta^' but with no local- 

 ity indicated, which I think is the young of this species. It is 

 only 22 mm. across and is somewhat damaged but there is little 

 doubt it is an Araeosoma. The spines of the upper surface are 

 notably long and relatively more numerous than in larger speci- 

 mens and the color is rusty-red. This color, however, may have 

 been artificially produced, after preservation. 



