ACTINOrOJiOUS UdLOTllUlUUlDK.N.. 



onliiiary sup[H)rliii^ mils in ilu; ix'dicoLs of S. Iriradiala, aiiil arc 

 urraiii^'od iiarallcl to Ilu; ciid-ijlato. 



Ixemarhs : — Tlit; arraiiLCcmcut and size of aiuhulacrul appondagos 

 aro difTcreiit from those of -S'. h'iradiaia. l'i'ol)al)Iy tlic markings 

 too arc difToront. I!ui above all, the spicnles of this s[)ecies aro 

 so strikingly dillei'ont fmm those of tlie other known species of 

 Sijnallactcs that 1 tliiiik it must he treated us a new s])ecies. 

 The specific name is in reference to the discoklal shape of the 

 base of the taljles. 



5. Sffnnlldcti-s isJu'kfiwai, sp. u 



(Texlfig. 4). 



►Specimens examined :- 



Description : — Iknly snhcyliiuh'ical ; (k)rsal and ventral surfaces 

 distinct, the ventral snniewhat Hat. When fresli, of a distinct 

 brown tint. (Jn specially contracted parts, wherever there was a 

 mass pro(hicod by contraction, that p)art had a deej) In'own color. 

 At present, the color is gone, exce])t from the ti[is of pajiillae 

 which remain hrowii, and the whole body has a diity white 

 color and a caililagedike aspect. 



Dorsal jiapillae in six rows, there being two rows on i'ach 

 of tlie two dor.sal ambulacra. The piapillae in these two rows 

 stand generally opposite one another at nearly cc^ual distances, S(_) 

 that they form very regular series or lines of papillae from the 

 front backward. There are about "28 — 4U papillae in each row. 



