90 THE ANNELIDA POLYCHAETA. 



g. Terminal piece of composite setae, long, articulated Sthenelais Kinberg. 



gg. Terminal piece of composite setae very short, not articulated, apex entire. 



Sthenelanella Moore. 



//. Composite setae spinigerous Sthenolepis Willey. 



ee. Median tentacle without ctenidia; elytra not completely covering the dorsum, the latter 

 naked at middle anteriorly. 



/. Composite setae falcigerous; median tentacle typically attached at anterior margin of 

 prostomium; elytra thick, with numerous papillae to which solidly adhere grains of 



sand or particles of shells, etc Psammolyce Kinberg. 



//. Composite setae spinigerous; median tentacle very short, inserted farther caudad 

 directly on the prostomium; elytra thin and smooth, with no such adhesive papillae 



bearing foreign bodies Leanira Kinberg. 



dd. Lateral tentacles free, not fused to first parapodia; median tentacle small, inserted directly 

 on prostomium above; composite setae falcigerous Euthalanessa Darboux. 



Synonymy of Genera. 



Thalanessa as used by Mcintosh, Haswell and various more recent writers 

 is a quite different genus for which Darboux rightly proposes another name, 

 Euthalanessa. 



Eusthenelais Mcintosh (1876) is regarded as synonymous with Sthenelais 

 Kinberg, as I am able to find no generic differences. Conconia Schmarda is also 

 equivalent to Sthenelais. 



Eulepis Grube is preoccupied in Insecta (Dalman, 1820) and also in Rep- 

 tiUa (Fitzenger, 1843). It is here replaced by Eulepethus, nom. nov. and the 

 name of the subfamily changed to Eulepethinae. 



Sthenolepis Willey. 



Ceylon pearl oyster fisheries report, 1905, pt. 4, p. 259. 



Sthenolepis areolata (Mcintosh). 



Willey, Ceylon pearl fisheries report, 1905, pt. 4, p. 259; Moore, Proc. Acad. nat. sci. Philad., 1910, p. 



391; IzuKA, Journ. Coll. sci. Imper. univ. Tokyo, 1912, 30, p. 89, pi. 10, fig. 8. 

 Leanira areolata McIntosh, Challenger Annelida, 1885, p. 151, pi. 21, fig. 3, pi. 25, fig. 8, 9, pi. 13A, 



fig. 1; Moore, Proc. Acad. nat. sci. Philad., 1903, p. 426. 



Locality. Off E. point Santa Rosa Island, Cal.: Sta. 4571 (lat. 33° 40' 

 N., long. 119° 35' W.). Depth between 20 and 900 fathoms, a special sounding 

 not taken. Character of bottom and bottom temp, not ascertained. 7 October, 

 1904. One incomplete specimen. 



The species was dredged by the Albatross earlier in the same year at sev- 

 eral points near Monterey Bay and off the southern coast of California at depths 

 from 66 to 971 fathoms. (Cf. Moore, Proc. Acad. nat. sci. Philad., 1910, p. 391). 



