THE MOUNT DESEET REGION i) 



Suborder CYCLOEHAGAE 



Echinoderidae 



Echinoderella Zelinka 



EchinodereUa remanei spec. nov. (figs. 7 and 8) 



The body is distinctly contracted at the extremities. The 

 middorsal spines are rather long and are present on zonites 

 VI-X. 



Length: 0.33 mm.; width: 0.08 mm. Length-width ratio, 

 4.1 :L 



Lateral spines are present on the margins of the dorsal 

 plates of zonites VIII-XI. There are no more large spines, 

 except the two pairs of cereal spines. 



Small setae are scattered over the whole dorsal snrface of 

 zonites IV-XIII. A close-set, even row of setae occurs on 

 the lateral and ventral portions of zonite IV about the middle 

 of the zonite. A similar row occurs on the ventrolateral and 

 ventral portions of zonite V, and a row of shorter, finer setae 

 on zonite VI. Scattered setae appear on the ventral plates 

 of zonites V-XII. The anterior and posterior margins of 

 zonite XIII are each marked by a row of extremely fine setae. 



The posterior margin of zonite XIII is deeply incised and 

 the projecting tips each end in a conspicuous mucro. The 

 lateral cereal spines are about half as long as the medio- 

 lateral. 



The pachycycles are narrow and plain, without cusps or 

 accessory pachycycles. 



Occurrence: Dredged once in company with Pycnophyes 

 frequens. 



Type: G3 (Collection Biological Survey Mount Desert 

 Eegion). 



Remarks : Except for the absence of eyes, this species 

 would be better assigned to Echinoderes. The number and 

 size of the middorsal spines will distinguish it, both from the 

 two species of Echinoderella, and from the larger species of 

 Echinoderes. 



I take pleasure in naming this species for Dr. Adolf 

 Remane, of the Christian- Albrechts-Universitat (Kiel). 



