ACTTXOPODOT'S HOT.OTHT^RIOIDEA. Z.) 



make out details, Imi i-hcv prol)al)ly present notliing exceptional. 



Calcareous (le])osits in the dorsal perisome (textlig. 4 c) very 

 mueli like those of the other species of Synallactes. At the 

 liase of dorsal i>ai)ilhie they are especially largo. In the Itasal 

 part there also exist curved supporting rods with ])!)tli ends per- 

 forated {(I). There are some very weakly develoix'd terminal 

 plates. The ventral perisome has very characteristic calcareous 

 deposits. There is a lower, very thickly cn'owded layer of rods 

 {c,f), and scattered over these are discoidal triradiate tables (/'). 

 In the ventral pedicels the I'ods and tables are of the same gen- 

 eral character as those of the ventral perisome. At the base 

 there are no specially large tables. There is numerically a some- 

 what larger proportion of the triradiate type in comparison with 

 the circular ones. End-plates well developed. 



Rcmarhs : — The species is named for my friend Dr. Isiiikawa, 

 Professor of Zoology in the College of Agriculture, Tokyo Imperial 

 University. 



6. Siptallactcs noxaivni, sp n. 



(ToxtSs. 5). 



Spocimnii oxaminod :— One alcoliolic specimen from Hokkaido. Noza\\'a 

 don. et (v.ll. (.Sfi. Coll. S'pn<'. No. IJuO). 



Dcscripllon : — The single sj)ecimen at my disi)osal diders in 

 several respects fi'om N. Irirndidfa, and at the same time does not 

 agree with any known species, so that 1 have lit(!(^ hcsiiatiDU in 

 making it a new species. 



At present it is contracted, measuring cm. in length. The 

 color is pale witli a violet tinge. In fresh state jirnbalily nuich 

 more violet. 



[ can count 1'^ tentacles in the specimen. Ambulacral ap- 



