NO. 1 hartman: goniadidae, glyceridae, nephtyidae 107 



The prostomium lacks eyespots; it is approximately rectangular 

 seen from above. Nuchal organs are inconspicuous at the postectal 

 margin of the prostomium. The first parapodia are smaller than the 

 others and directed forward at the sides of the prostomium. Notopodial 

 cirri are typically small and bulbous with a distal filament. Ventral 

 cirri are small and inconspicuous throughout, inserted near the neuro- 

 podial base and thus far surpassed by the long ramus. Acicular lobes are 

 long, cylindrical and bluntly conical at the free ends. Preacicular setae 

 are barred and present in anterior segments where they are as large as, 

 or more conspicuous than the accompanying postacicular setae. Farther 

 back they gradually diminish in size and are absent from segments in 

 the posterior half of the body. Postacicular setae are smooth or very 

 delicately toothed at the edge. Furcate setae have not been identified. 



Distribution. — N. cornuta is known only from Friday Harbor, 

 Washington and southwestern Canada, to 20 fms (Berkeley). 



Nephtys monroi, new name 

 Plate 17, fig. 1 



Monro, 1933a, pp. 53-55, fig. 23h. 



Material examined. — A specimen labelled Nephthys tabogensis 

 Monro, from Taboga, Panama, in the British Museum, London, Eng- 

 land. 



This species is partly described but not named by Monro (1933a, 

 p. 53) as Nephthys tabogensis (see also A glaophamus , below). A single 

 large, mature male individual measures 63 mm long and 3 mm wide 

 without parapodia. It consists of 67 segments and has a posterior re- 

 generating end. Interramal cirri are recurved, not involute as are those 

 in A glaophamus tabogensis (Monro) ; thus the 2 individuals used in 

 the original description (Monro, 1933a) are not the same but belong 

 to different genera. 



The prostomium is much longer than wide. Anterior notopodial 

 lamellae are broad and slightly incised; this notch disappears in middle 

 and posterior segments. Interramal cirri are first present from the eighth 

 segment and continued back at least through segment 67 ; they decrease 

 somewhat in size after about segment 50. Notopodial cirri are short 

 and foliaceous; they do not elongate in any part of the body. Anterior 

 notopodia have a short, broad, slightly incised anterior presetal lamella, 

 a conical acicular lobe and a longer, broad, rounded postsetal lamella. 

 The notopodial cirrus is short and foliaceous; it has an acute tip. In 

 median and posterior segments the shallow incision of anterior lamellae 

 disappears and this part comes to be broadly rounded. Neuropodia are 



