1914] Treadivell: Poly chaetous Annelids of the Pacific Coast 189 

 Nereis procera Ehlers 



Nereis procera Ehlers (1864), p. 557, pi. 23, fig. 2. 

 Collected from Kodiak Islands and Yakutat, Alaska; Pleasant 

 Beach, Puget Sound ; Black Point, San Francisco Bay ; Pacific Grove ; 

 Portuguese Bend; Avalon, Santa Catalina Island; and San Diego. 

 Collected also in the following hauls : XV, off San Pedro in 4 to 7 

 fathoms on coarse sand; XVI-2, off San Pedro in 9 fathoms on 

 small rocks ; XVII, off San I'edro in 4 to 10 fathoms on fine sand ; 

 XIX-2, off San Pedro in 30 to 77 fathoms on soft sandy mud with 

 many pebbles ; XLII, in San Diego Bay in 3 to 7 fathoms on soft 

 black mud; XLIII-1, in San Diego Bay in 3 to 7 fathoms on soft 

 black mud; XLVII-2, off San Diego in 8 to 11 fathoms on hard sand 

 and pebbles ; 1551, off San Clemente Island in 48 fathoms on coarse 

 sand. 



Nereis agassizi Ehlers 



Nereis agassizi Ehlers (1864), p. 542, pi. 23, fig. 1. 



This species is numerous and occurs with Nereis procera. The two 

 species are similar, but N. agassizi has a peculiar hooked seta in the 

 posterior somite, while iV^. procera has, in this region, a peculiar seta 

 whose terminal joint fits into a socket at the end of the basal. N. 

 agassizi has in the fifth and immediately following somites, a peculiar 

 swelling on the parapodium. The characters of the head, antennae, 

 etc., vary with the mode and degree of preservation. 



Collected from Port Orchard and Channel Rocks in Puget Sound; 

 Trinidad ; Humboldt Bay ; Cape Mendocino ; Duxbury Reef ; Fort 

 Point, Lime Point, and Black Point in San Francisco Bay; Pacific 

 Grove ; Santa Barbara ; San Pedro ; Avalon, Santa Catalina Island ; 

 San Diego Bay; San Clemente Island; and Honolulu Harbor. Col- 

 lected also in the following hauls : II-2, in San Pedro Harbor in 2 to 

 3 fathoms on quantities of sea- weed; VI-2, in the outer San Pedro 

 Harbor in 3 fathoms on gray sand; XV, off San Pedro in 4 to 7 

 rocks; XVI-2, off San Pedro in 17 fathoms on pebbles and small 

 rocks ; XVII, off San Pedro in 4 to 10 fathoms on fine sand ; 

 XXVIII-1, off Santa Catalina Island in 12 to 30 fathoms on coarse 

 sand and broken shells ; XLIII-2, and 3, in San Diego Bay in 5 to 8 

 fathoms on soft black mud; XLVI-1 and 2, in San Diego Bay on a 

 sandy bottom in 5 fathoms; XLVII-1 and 2, off San Diego in 8 to 

 10 fathoms on hard sand ; LIX, off the Coronado Islands in 15 fathoms 



