NO. 13 A NEW GENUS OF BRITTLESTARS — CLARK 3 



smaller than the first. There are four thick and stout teeth, which 

 have more or less rounded ends ; the uppermost tooth is sunken well 

 below the level of the jaws. There are no tooth papillae. 



The adoral shields resemble those of Sigsbeia murrhina. 



The mouth shields are smaller than are those of S. murrhina, owing 

 to the absence of an aboral lobe, the shields being bordered aborally 

 by a straight line bordering the genital slit. 



In each interbrachial space there is a single conspicuous genital 

 slit, which passes between the arm bases just beyond the mouth 

 shield. 



The color abactinally is a very pale ecru drab with an irregular 

 central patch of white, becoming darker beyond the arm bases. The 

 seventh upper arm plate, and every fifth one beyond, is white. The 

 color actinally is white. 



EXPLANATION OF PLATE 

 Plate i 



Fig. I. Quironia johnsoni, n. gen., n. sp., the type specimen (U.S.N.M. no. 



E.3265) from Caroline station 45, abactinal view. X 3- 

 Fig. 2. Quironia johnsoni, n. gen., n. sp., the type specimen (U.S.N.M. no. 



E.3265) from Caroline station 45, actinal view. X 3- 



