50 HARTMAN 



hairs (fig. 1). In addition, in anterior or lateral series, there are fewer, 

 larger, broader, longitudinally grooved tentacles (fig. 2). 



Branchiae number three pairs and are much longer than the longest 

 oral tentacles. They are inserted so that the first pair is farthest apart, 

 the second nearest together, and the third with only a narrow middorsal 

 space separating them (fig. 1). Numerous peristomial eyespots are best 

 seen by laying aside some of the cylindrical oral tentacles ; they form two 

 or three irregular rows on the peristomium, located between the dorsal 

 bases of the large lateral lappets. The eyes are uniformly small and red- 

 dish brown (preserved). 



The ventral side of the thorax is nearly smooth except for segmental 

 grooves; ventral scutes are inconspicuous. Thoracic parapodia are small 

 and obscure on the first two or three segments and thereafter increase 

 in size. Notopodial lobes are short, papillar and their setae emerge in 

 close fascicles. The corresponding neuropodia form elongate ridges, from 

 which the uncini emerge in single series. Setae are long, slender and 

 weakly limbate. Thoracic uncini are present from the first setigerous 

 segment ; they are best developed in the middle thoracic segments. Uncini 

 are long handled (fig. 5), have a curved shaft, a subdistal shoulder, and 

 extend distally as a large fang that is almost at right angles to the shaft. 

 A semicircle of about seven smaller teeth surmounts the fang (fig. 6). 



Abdominal parapodia are simple, uncinal lappets; they lack the 

 auricular lobes that are present in Artacama coniferi (below). The 

 uncini occur in single series, at the distalmost edge of the ridges. Uncini 

 are avicular (figs. 3, 4) ; a larger fang is surmounted by many small 

 teeth in two rows. 



It is a pleasure to name this species for Captain Allan Hancock, 

 Founder and first Director of the Allan Hancock Foundation. 



Distribution: Artacainella hancocki is known only from San Pedro 

 Basin, California, in 11 to 50 fms. 



Artacama Malmgren 

 Artacama coniferi Moore, 1905 



Artacama coniferi Moore, 1905, pp. 853-855, pi. 44, figs. 11-13 

 Artacama conifera Berkeley and Berkeley, 1952, pp. 74-75, figs. 150, 151 



Collections: Stations 496-36^ (1) ; 992-39 (1) ; 1183-40 (1) ; 1471- 

 42 ( 1 ) ; others are from the Chukchi Sea, northwest of Alaska, in shallow 

 depths. 



^The data for the hyphenated station numbers have been published in Fraser, 1943. 



