254 PROCEEDINGS OF THE ACADEMY OF [April, 



LUMBRINERID^l. 



Lumbrineris zonata Johnson. 



Lumbriconereis zonata Johnson, Proc. Bos. Soc. Nat. Hist., XXIX (1901), 

 pp. 408, 409; PI. 9, figs. 93-100. 



San Diego, several. Monterey Bay, numerous specimens taken 

 at the following named points: "big tide pool," June 20, 1905; "point 

 above Third Beach," July 12, 1904, and July 6, 1905; "Moss Beach," 

 July 7, 1905; and "picnic tables, 17-mile drive," June 29, 1904. 



This species is generally more slender than the next, the largest 

 example reaching a diameter of only 3 mm. The cuticle frequently 

 exhibits a beautiful greenish luster. Many of the specimens are 

 brown or purplish-brown with darker spots on the prostomium, 

 peristomium and on the sides of the setigerous segments; others are 

 conspicuously annulated with dark brown bands and others nearly 

 uniform in color. Those carefully studied have the seta? arranged in 

 some of the anterior parapodia ( V-XV) as follows : 3 or 4 large bilim- 

 bate dorsal seta?, 3 or 4 short hooded crochets in the middle and 3 

 small sigmoid bilimbate seta? below. The large maxillae commonly 

 bear four or five teeth. The caudal end tapers rapidly to a minute 

 tubular pygidium bearing a pair of closely approximated, very short, 

 thick, blunt cirri. 



Lumbrinsris erecta Moore 



Lumbriconereis erecta Moore, Proc. Acad. Nat. Sci. Phila., 1904, pp. 490- 

 492; PI. XXXVII, figs. 19-22, PI. XXXVIII, figs. 23-25. 



Unlike the last this species appears to be most abundant at San 

 Diego, where about forty specimens were taken in the littoral zone. 

 At Monterey Bay several were taken at "big tide pool," June 20, 1905, 

 and "Third Beach Point," July 6, 1905. 



The largest measure nearly 7 mm. in diameter. The prostomium 

 may be broad and obtuse or pointed. The posterior parapodia bear 

 very long erect lobes which are the distinguishing feature of this 

 species. The large maxilla? bear four teeth. Stalked infusoria are 

 frequently attached in the furrows between the parapodia. 

 Drilonereis nuda sp. nov. (Plate VIII, tigs. 21-23). 



Excessively elongated and filamentous and of nearly uniform 

 diameter. The three complete specimens in the collection are respec- 

 tively 327, 445 (type) and 630 mm. long, with 480, 652 and 935 segments, 

 the maximum width being 1.3 mm. and the depth 1 mm. 



Prostomium strongly depressed, about one-third as deep as broad 

 and nearly as broad as long in the type, but more extended in one 

 cotype, broadly rounded in front, slight median grooves extending 



