NO. 3 hartman: polychaetous annelids 213 



Collections. — 305-34, 633-37. 2 specimens. 



Lengths 22 and 15 mm. There are 18 body segments, all but the first 

 (cirriferous) have acicular lobes; the second to the second last, or 16 seg- 

 ments, are setigerous. 



Notopodial setae are first present from the fifth setigerous segment. 

 They are slender, lanceolate, delicately serrated along one edge. The neu- 

 ropodial setae are composite, falcigerous (pi. 33, figs. 34, 35) ; often 1 or 

 2 ventralmost retain the pointed, protecting sheath (pi. 33, fig. 34). They 

 range from shorter, superiormost, to longer, inferiormost (pi. 33, fig. 

 35). 



The prostomium is slightly broader than long, the 4 reddish-brown 

 eyes are subequal. The paired anterior antennae are long, cirriform, 

 longer than the prostomium. Between them the large facial tubercle is 

 inserted. This is proportionately larger or smaller, depending on whether 

 the proboscis is retracted (pi. 33, fig. 32) or everted (pi. 33, fig. 33). 

 A similar effect is observable in the proportionate sizes of the palpi. The 

 median prostomial antenna is inserted on the posterior half of the pro- 

 stomium, in a shallow, median sulcus. The jaw piece is pale yellow. 



Ehlers (1901, p. 83) identified specimens from Juan Fernandez (off 

 southwestern South America) as L. chinensis Kinberg on comparison 

 with Kinberg's type which came from near Hong Kong. In this connec- 

 tion it is noteworthy that Okuda (1937, p. 270) reported L. claparedii 

 from Japan. The specimens from western Mexico agree reasonably well 

 with Okuda's good account save that the posterior eyes are as large as the 

 anterior ones, and the prostomium is proportionately less broad in ours. 

 Also, the median prostomial antenna is inserted posterior to the eyes (pi. 

 ZZ, fig. 33) ; in Okuda's illustration it is shown between anterior and 

 posterior eyes, about as shown for L. claparedii by Fauvel ( 1923, fig. 88). 



Distribution. — Tropical Pacific; Indo-Pacific; off western South 

 America; western Mexico; Gulf of California; PMediterranean. Sub- 

 intertidal, to 18 fms. 



Family Stauronereidae 



Genus STAURONEREIS Verrill 



Includes Staurocephalus Grube, Anisoceras Oersted, Dorvillea Parfitt, 

 and Prionognathus Keferstein. 



