146 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



the unique prostomial and proboscidial parts. I know of only one other 

 species of Lumbrineris , L. mucronata Ehlers (1912, p. 95), that has a 

 similar, elongate prostomium, but in the latter the hooded hooks are 

 strongly bidentate at their distal end instead of having numerous fine 

 teeth. 



Distribution. — The known range of L. acuta is thus extended from 

 New England to western Mexico in 69-79 fms, and southern California, 

 in 74-103 fms. 



Lumbrineris zonata (Johnson) 



Lumbriconereis zonata Johnson, 1901, pp. 408-409, pi. 9, figs. 93-100. 

 Moore, 1909, p. 254; Treadwell, 1914, p. 196; Chamberlin, 1918, p. 

 176; 1919, p. 258; Treadwell, 1922, pp. 175-176; Berkeley, 

 1927, p. 409. 

 L. brevicirra Hartman, 1939, pp. 161-164 (not Schmarda, 1861). 

 Hartman, 1942, pp. 123-124, fig. 13. 



Collections.— 902-3S (4); 903-38 (3); 904-38 (3); 906-38 (2); 

 907-38 (2); 910-39 (about 12); 913-39 (2); 1189-40 (1); 1208-40 

 (about 22); 1210-40 (1); 1211-40 (5); 1216-40 (2); 1315-41 (4); 

 1441-41 (many) ; 1447-42 (3) ; 1448-42 (3). 



This has simple hooded hooks from the first parapodia in addition to 

 simple limbate setae, as I have been able to verify by re-examination of 

 the type specimen at Harvard University. Acicula are yellow. Posterior 

 parapodial lobes are short, but the postsetal exceeds the presetal portion. 

 The maxillaiy formula is about as follows: forceps are falcate; maxilla 

 II has 5 teeth left, 4 right ; maxilla III has 2 teeth on either side ; maxilla 

 IV has a single tooth on each side. (A specimen from coll. 1189-40 dif- 

 fers from the typical form in that maxilla II has 6, instead of 5, teeth on 

 the left side.) The prostomium is bluntly conical, slightly depressed. 

 Limbate setae are usually absent posteriorly, but an occasional segment 

 may have a single, slender seta in the superior part of the fascicle, even 

 far back. 



This is the commonest species of Lumbrineris in the intertidal zones 

 of the northeast Pacific. In southern California it appears to include 2 

 distinct ecologic forms. One inhabits rocky crevices and sandy or gravel- 

 ly spaces on the under sides of rocks; it is a crevice dweller; in life it is 

 orange brown, highly iridescent; it is often robust and relatively shorter 

 and thicker than its closely related form. The second is found in clean, 

 sandy beaches, in burrows that are more or less vertical ; it is notably 

 longer and slenderer than the first; in life it is deep or rose pink, only 

 slightly iridescent, and the dorsal parts of segments are often marked 

 with a speckled white band that extends across the parapodia. It has not 



