THK AXXALS 



AND 



MAGAZIXR OF NATUR.U. HISTORY. 



[SEVEXTII SERIES.] 

 No. SO. AUGLT.ST 1904. 



XIII. — On some Eclinnf/iurir/s from Japan and thf' Indian 

 Ocean. By Dr. Ti[. MORTEXSKX, Copenhagen. 



[Plates II.-V.] 



I.\ the autumn of 1002 Professor F. Jeffrey Bell sent me .«ix 

 specimens of Japanese Echinothurids, asking me to examine 

 them. I found them to belong to three different genera 

 and .species, two specimens of each. One of tiiem proved 

 to be an interesting new species of Arceosoma, the two others 

 to be identical with the two species described by Yoshiwara, 

 Astlienosoma y /mat' and A. longiftpinum^ two species as yet 

 insufficiently known, so that I had to leave it undecided in my 

 revision of the Kchinothuridas in the * Ingolf Echinoidea * 

 to which genus they should be referred. The collection thus 

 proved to be of considerable interest. Knowing, however, 

 that Dr. de Meijeie was al)out to treat some closely related 

 forms in the 'Sibogu' Echinoidea, I thought it better to 

 postpone examining the little collection till de ^leijere'd 

 work had appeared, and Profe.s3or Bell willingly agreed to 

 my proposition. As that eminent work has now a[)peare(l, 

 no further delay is needed. 



-Meantime 1 have likewise received for examination four 

 fpfcinens of Japanese Echinothuiiils from the Museum of 



• The Danish ' Injolf Expoflition, iv. 1, Eohinnidfln. i. (lf»0.iy 

 Ann. (f- M<i<j. A'. ///.•-/. ;5er. 7. Vol. xiv. o 



