Records. — Common in Beaufort Sound on 

 intertidal mudbanks (11, 12. 13, 15, 18, 20, *). 



Distribution. — North Atlantic from Sweden 

 and Greenland south to Morocco and the Gulf 

 of Mexico; Mediterranean; South Africa; North 

 Pacific from Japan to southern California; 0- 

 100 m. 



Nolomaslus lobatus Hartman. 1947 



NotamastHs lobatus Hartman, 1947a: 415, pi. 51: 

 Fig. 1-5; 1969: 399, Fig. 1-5. 



Remarks. — A large 150-nim specimen was 

 obtained from burrows in 'intertidal mudbanks 

 near Cape Fear by members of the Zoology 

 Department, Chapel Hill University. Apart from 

 the straplike branchiae, the flattened ventrum is 

 characteristic. Two commensals were found in 

 the burrows, a polynoid polychaete Lepidas- 

 theiiia sp. and a sluglike bivalve moUusk of the 

 family Montacutidae which creeps over the body 

 of the Notoniastus. 



R(eords. — North Carolina in intertidal mud 

 (*). 



Distri/>utio)i. — Southern California to Mexico; 

 intertidal to 500 m. 



Notomasfus latericeus Sars. 1851 



Notomastus latericeus. - Fauvel, 1927: 143, Fig. 

 49 a-h. - Hartman, 1947a: 411. - Day, 1967: 

 599, Fig. 28.2. a-d. 



R( cords. — Cape Hatteras area and Beaufort, 

 intertidal to 200 m (5, 13, 18, 21, *). 



Distributio)i. — Cosmopolitan, intertidal to 

 4,360 m. 



Notoniastus hemipodus Hartman, 1947 



Notomast us (Clistomastu.t) he mipodus Hartman. 

 1947a: 424, pi. 48: Fig. 1-3; 1951: 103, pi. 

 24: Fig. 1-3; 1969: 393, Fig. 1-5. 



Remarks. — N. hemipodus Hartman and A'. 

 aberans Day are closely related. The individual 

 hooks of N. hemipodus have a single arc of five 

 or six denticles above the main fang. In N. 

 aberans there are two arcs of denticles, the first 

 arc with four or five larger denticles and the 



second arc with five to seven smaller denticles. 



/?((7>)f/.s.— Off Beaufort in 120 m (21, *). 



Distribution. — Florida and .southern Cali- 

 fornia; intertidal to 120 m. 



IK'otomastus americanus New Species 



FiKure l.'?l-n 



Notomnstus n. sp. Day, Field, and Montgomery, 

 1971: 123. 



Holoti/pe.—USNM 43118; 14 paratypes, 

 USNM 43119. 



D( scriptioii. — Holotype almost complete, 

 measuring 18 mm for 55 segments. Color yel- 

 lowish brown with dark faecal pellets visible 

 through abdominal wall. Prostomium broadly 

 conical with subdermal eyespots at base. An 

 achaetous peristome followed by 11 setigerous 

 thoracic segments. Capillary setae present in 

 all notopodia but absent in first neuropodium, 

 present in setiger 2 to 10 but replaced bv hooks 



lie 



in nth. Formula: P + 



12. Ab- 



-h 9C -^ IH 

 domen not clearly differentiated but posterior 



segments with hook-rows on well-marked ridges. 

 Nephridial papillae obscure and branchial pro- 

 jections absent. Hook-rows short throughout; 

 notopodial rows (Figure 131) separate medially, 

 neuropodial rows separated by a midventral 

 gap longer than a hook-row. Individual hooks 

 (Figure 13m, n) with two arcs of denticles above 

 main fang, first arc with four denticles, second 

 with two; formula: MF : 4 ; 2. 



Riuiarks. — N. america)ius resembles A^. teres 

 Hartman in lacking neurosetae in the first seti- 

 ger and in having hooks in the neuropodia of 

 the posterior thorax. It differs in having the 

 hooks confined to the last thoracic segment and 

 in having the abdominal hook-rows all short 

 and widely separated ventral ly. 



Records. — Fifteen specimens in 80-200 m off 

 Beaufort (21, *). 



Leiocapitella glabra Hartman, 1947 



L( iocapitcUa glabra Hartman, 1947a: 438, pi. 54: 



Fig. 1-3." 

 Leiocapitella atkuitica Hartman. 1965a: 193. 



Description. — Prostomium broadly conical, 

 depressed; eyespots indistinct. All segments 



100 



