NO. 1 HARTMAN: POLYCHAETOUS ANNELIDS 57 



larger, more widely spaced papillae ; there are 28 to 30 sets of these rows 

 around the style near its base. 



Branchiae are first present from the fourth or fifth setiger, the an- 

 terior ones are heavy, strongly spiraled. Ventral cirri of the first 4 setigers 

 are cirriform, thereafter they are padlike. The postsetal lobe in the first 

 few segments is vaguely bidentate to nearly entire; it is long, triangular 

 in its superior part, and has a smaller, short inferior part, about equaling 

 the presetal lobe in length. 



Hooded hooks in anterior segments are clearly bidentate, the teeth 

 set obliquely to the shaft (pi. 1, fig. 23). Subacicular hooks are present 

 from about the eighteenth setiger; they are hooded, bidentate (pi. 1, 

 fig. 21) as tj^pical of the genus. Pectinate setae are coarsely toothed (pi. 

 1, fig. 22) and notably larger than those in D. ornata (above). Limbate 

 setae are finely toothed at the cutting edge, contrasting therein with 

 similar ones in D. ornata, where they are nearly smooth. 



The tube is coarse, increases in size distally, as in most species of the 

 genus; the aperture is a lateral vent. It is lined with a parchmentlike 

 layer and externally covered with foreign particles including small sticks, 

 shell bits, etc., often attached so as to make close, transverse layers. Its 

 general appearance is far less ragged than that of D. ornata (above), 

 where similar building materials are used. 



D. calif arnica Moore (1904, p. 484) is herewith referred to the 

 older D. splendidisstma Kinberg because of the striking similarities in 

 details of microscopic parts. 



Distribution. — First described from Guayaquil, Ecuador, D. splendi- 

 dissima has since been reported from the Perlas Islands (Monro, 1928). 

 The present collections extend the range through Lower California and 

 California north to Monterey. Bathj^metric range is intertidal to 16 fms. 



Diopatra obliqua, new species 

 Plate 2, Figs. 24-36; Plate 16, Figs. 331-333 



Collections.— 2\6-3^ (1); 259-34 (tubes and specimens); 264-34 

 (1); 364-35 (2); 365-35 (many); 369-35 (3); 373-35 (2); 385-35 

 (1); 402-35 (many); 770-38 (over 50); 820-38 (1); 832-38 (2); 

 833-38 (about 10) ; 835-38 (1) ; 845-38 (2) ; 850-38 (3 tubes) ; 868-38 

 (3) ; 930-39 (4) ; 1074-40 (1) ; 1078-40 (2) ; 1088-40 (1). 



Most individuals in these collections are marked with a characteristic 

 dorsal color pattern that persists in alcohol. The first (one to 8 or 10) 

 segments are nearly solid reddish brown, or there may be a pale diamond- 

 shaped spot in the middle, or also similar paired spots at the sides. Later 



