Leodicidce from Fiji and Samoa. 



153 



Genus PARAMARPHYSA Ehlers. 



Ernst Ehlers, Florida Anneliden, p. 99. 

 Similar to Marphysa in every respect except that it lacks gills. The individuals 

 are usually small as compared mth Marphysa and have delicate and comparatively 



soft jaw-apparatus, 



Paramarphysa teres, new species. 

 Plate 6, figures 2 to 6; text-figures 40, 41. 



Two incomplete specimens were collected in Pago Pago Harbor. One specimen, 

 incomplete posteriorly, is 75 mni. long, 0.75 mm. in diameter at its widest part, and 

 contains over 200 somites. 



The prostomium (plate 6, fig. 2) is deeply bilobed, hardly wider than the peristo- 

 mium. The median tentacle is about twice as long as the prostomium, the inner 

 paired about half as long as the unpaired, the outer paired rather more than half as 

 long as the inner paired. On either side there is a prominent eye situated just outside 

 the base of the inner paired tentacle. No pigmenta- 

 tion is present in any portion of the body. In the 

 preserved material the anterior ventral surface is much 

 flattened, the parapodia prominent, and the dorsal cirri 

 are relatively large. Behind about the region of somite 

 50 there is a change in the form of the body, in that the 

 cross-section is nearly round and the dorsal cirrus be- 

 comes very small. 



One of the two specimens was badly distorted as a 

 result of drying and the prostomium of the other had 

 been injured, so that neither was entirely normal, but 

 neither showed any distinction between the first two 

 somites, which together are longer than the prostomium. 

 At the anterior border the prostomium has a median 

 indentation, and its anterior diameter is a trifle wider 

 than itc posterior. 



Anterior parapodia (a drawing of the thirteenth is 

 shown in figure 3, plate 6) have relatively rather prom- 

 inent dorsal cirri, with a vertical anterior and a rounded 

 posterior lip, and a dense tuft of setae arising between the 

 two. There is a single acicula situated near the dorsal 

 surface of the parapodium. The acicula has a very 

 dark base, but is much hghter in color near the apex. 

 Both simple and compound setse were present in the 



parapodium drawn. A number were broken, but apparently the arrangement is 

 that there is an anterior vertical row of compound sets extending to the dorsal surface 

 of the parapodium. Posterior to the dorsal end of this row is a smaller tuft of simple 

 setsD. A posterior parapodium (plate, 6, fig. 4, from the region of the two-hundredth 

 somite) is conical, with no evident distinction between anterior and posterior lips, and 

 with quite similar dorsal and ventral cirri. The ventral cirrus is located a little nearer 

 the apex of the parapodium than is the dorsal, but otherwise they are very similar. 

 In the one drawn there were 2 simple and 2 compound setse, the simple lying ventral 

 to the compound. Simple setae from the region of the two-hundredth parapodium 

 are very slender, of uniform width to about one-third of their length outside the 

 body- wall; at this point they bend at an angle of about 45° and taper to a very fine 

 point. The compound setae are very small and slender, the terminal portion having 

 an apical and a subapical tooth and a hood (text-fig. 40). In the thirteenth parapo- 

 dium the compound setae are similar to those in later somites, while the simple ones 

 widen slightly, bend toward the apex, becoming very narrow and curved beyond the 

 bend (text-fig. 41). 



Text-Figures 40 to 44. 



40 and 41. Paramarphysa 

 teres. 40, compound seta X 

 250; 41, simple seta X 250. 



42 to 44. Lysidicefusca. 42, 

 compound seta X 250; 43, pec- 

 tinate seta X 500; 44, simple 

 seta X 250. 



