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238 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXV 



some specimens have the teeth on the cephaUc limbus prominent 

 and acute, others have them much more obscure and in one case 

 the limbus is scarcely more than crenulated. A specimen 165 mm., 

 long taken on Beaver Shoal in San Diego Bay, is filled with large 

 ova. 



Stations 4510, off Point Finos Lighthouse, 91-184 fathoms, gray 

 mud; 4548, same locality, 46-54 fathoms, coarse sand and shells; 

 Beaver Shoal, San Diego Bay, mud. 



Praxilella gracilis (Sars). 



Six specimens represent this species. A complete one is 145 

 mm. long, 3.6 mm. in diameter at VIII. There are twenty-one 

 segments, the last four being achsetous. Somites II, III and IV 

 bear setae and one to three ventral spines; V to XVIII bear setae 

 and crochets. The head bears a slender, cirriform palpode. Two 

 anal funnels bear twenty-one and twenty-three slender, equal 

 cirri and another much stouter mid-ventral cirrus. Some fragments 

 of tubes are soft and fragile and covered with a thin coating of fine 

 sand. 



Stations 4452, off Point Pinos Lighthouse, 49-51 fathoms, 

 green mud and sand; 4463, same locality, 48-111 fathoms, rocky; 

 4517, same locality, 750-766 fathoms, green mud, sand. 



Praxillella? sp.? 



A pygidium and four achaetous segments of a large specimen 

 about 5 mm. in diameter. The margin of the anal funnel bears 

 forty-nine teeth or cirri, the median ventral being double, but not 

 larger than the others. In all other respects this species resembles 

 the preceding one. 



Notoproctus pacificus Moore. 1 



This species, which was described in the original ms. as new under 

 the name of iV. lineatus, is now considered to be N. pacificus, 

 though it may eventually prove to be distinct when a larger number 

 of examples of both forms is available for comparison. 



The features in which this differs from the type of N. pacificus 

 are the smaller number (about six instead of twelve) of filaments 

 in the crochet guards, the greater number of uncini in each series, 

 the total absence of pigment and difference in the number of pro- 

 pygidal achaetous segments, one of these specimens having one, 

 the other three, while the type of N. pacificus has two. As the last 



