LEPTONEIiEIS GLAUCA CLPDE. AND GENUS LEPTONEREIS KINBERG. 251 



the others. These three genera are, however, more closely related to one 

 another than to any of the remaining genera of Nereidse (i.e. Lycastis, 

 Ceratocephale, Tylorrhynchus, Dendronereis, and Micronereis). 



SURVEY OF THE GENUS LEPTONEREIS. 



For generic characters (emended) see above, [;. 245. 



1. LEPTONEREIS GLAUCA Claparede, 1870. 

 L. vaiUanti, de St. Joseph, 6. 



Range : English Channel. 



2. LEPTONEREIS PUSiLLUS Langerhans, 1878. 

 Leonnates pusiUus Langerhans, 5. 



Very closely allied to the preceding species, if not identical (see above, 



p. 249). 

 Range : Madeira. 



3. LEPTONEREIS CEBUENSis Grube, 1878. 



Grube's description of this species is mifortunately not accompanied 



by any figures. 

 Range : Philippine Islands. 



4. Leptonereis L-^vis Kinberg, 1865. 



This species must remain rather uncertain, as Kinberg's description 

 is very brief. The figures of anterior region and proboscis, a para- 

 podium, and the setse, are fairly good. The palps and tentacular cirri 

 are longer than in L. glauca. 



Range : Guayaquil (Ecuador). 



[Kinberg did not figure any of the other seven species which he 

 described under the genera Nicon and Nicoynedes, and his descriptions are 

 so brief as to be of little value for purposes of identification. The only one 

 of these which has been met with again is Nicon loxechini, from the 

 Straits of Magellan. In this case Ehlers has employed the name Nereis 

 loxechini Kinberg for a species of which a single small specimen was 

 collected by the German Deep-Sea Expedition at St. Paul Island (38° 40' 

 S., 77° 38' E.), in the southern Indian Ocean. Ehlers unfortunately does 

 not figure this specimen, nor does he describe it fully, so that there is 

 considerable doubt as to whether it should be assigned to the genus 

 Leptonereis. The Nereis eugenice Kinberg of Ehlers, although founded 

 on Kinberg's Nicon eugenice, is a true Nereis.] 



