442 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



eighteenth segments have only pointed setae in notopodia and neuropodia. 

 The next segment is transitional; its notopodium is provided with only 

 pointed setae but its neuropodium has only long-handled hooks or also a 

 few pointed setae (pi. 58, fig. 1) (see chart). Abdominal segments are 

 provided with only long-handled hooded hooks of a single kind. Bran- 

 chiae are present in far posterior segments and consist of a few palmately 

 divided filaments that arise from the posterior rim of the notopodium; 

 they are seemingly non-retractile. Lateral organs are present on all 

 thoracic setigerous segments and perhaps on all abdominal segments ; they 

 occupy a position nearly midway between the dorsal and ventral branches 

 of parapodia. Nephridial papillae are present in some thoracic segments 

 and occupy a position in the segmental furrow; they have not been 

 detected in abdominal segments. 



Anotomastus is characterized by its high thoracic segmental count; 

 pointed setae are continued posteriorly through 17 or 18 segments; it has 

 notopodial, branched branchiae in far posterior segments. A single species 

 is known (see below). 



Anotomastus gordiodes (Moore), new combination 



Plate 58, Figs. 1-6 

 Eunotomastus gordiodes Moore, 1909, pp. 278-279, pi. 9, fig. 56. 



Collections. — 1450-42 (6) ; 1451-42 (2) ; others from Mission and 

 Newport Bays and Anaheim Slough, southern California and question- 

 ably some from Bodega Bay, central California; intertidal. 



The prostomium is elongate and broadly rounded in front ; it lacks a 

 true palpode such as is present in some capitellids. The posterior margin 

 shows a pair of distinct nuchal slits. Each side has an oval, oculate area 

 that is more or less faded in some individuals ; it consists of 6 to 15 reddish 

 brown specks of irregular sizes in front of the nuchal slits. The pro- 

 boscis, everted in some individuals, is a subglobular sack that is smooth on 

 its distal half but has coarse papillae on its proximal half ; when seen in 

 profile each papilla is seen to terminate distally in a posteriorly directed, 

 hyaline hook. 



The epithelium of the thorax is nearly smooth except for transverse 

 wrinkles of contraction ; there are no areolations. The abdominal region 

 is similarly smooth except for the glandular, parapodial tori and the 

 branchiae in a far posterior region. 



Lateral organs are small but can be seen already from the first setiger- 

 ous segment. They are located nearly midway between notopodia and 



