about half as long as body width, clrrophores shorter than styles and 

 somewhat inflated. Parapodia prolonged. Composite falcigers having 

 short blades with minute distal tooth and somewhat larger subdistal 

 tooth (Figure 30-8b). Superior bayonet-setae very slender, hair-like 

 (Figure 30-8c), present only posteriorly. Acicula solitary, large, 

 thick, readily visible in two specimens (Figure 30-8a). Trepan of 

 pharynx with about 22-32 large equal teeth, all similar in size (Figure 

 30-8d). Proventricle located in setigers 15-20, with about 42-65 indis- 

 tinct muscle cell rows. 



REMARKS: Myrianida sp. A resembles M. pulchella Day, 1953, from South 

 Africa, in having a similar number of trepan denticles. It differs from 

 the latter in having shorter nuchal epaulettes and about half as many 

 muscle cell rows in the proventricle. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Two stations in northeastern Gulf 

 (Figure 30-7); 37-43 m; coarse sand. 



Genus Brania Quatrefages, 1866 



TYPE SPECIES: Exogone pusilla Dujardin, 1851. 



REFERENCES: 



Imajima, 1966:393. 



Day, 1967:267. 



Fauchald, 1977a:82. 



DIAGNOSIS: Prostomium with three antennae; palps well-developed, fused 



at least basally. Two pairs of tentacular cirri. Small nuchal organs 



present between prostomium and peristomium. Pharynx armed with single 



dorsal tooth. Embryos carried on dorsum of female. 



Key to the Gulf of Mexico BLM-OCS Species of Brania 



la. Superior composite falcigers with long, bidentate blades (Figure 

 30-10c); dorsal cirri present on setiger 2 2 



lb. Superior composite falcigers with short, unidentate blades (Figure 

 30-16d); dorsal cirri absent on setiger 2 3 



2a. Dorsal tooth located near anterior margin of pharynx; anal cirri 

 long, cirriform Brania clavata, p. 30-16 



2b. Dorsal tooth located about half-way back in pharynx (Figure 30- 



12a); anal cirri short, ovoid (Figure 30-12b) 



Brania sp. A, p. 30-19 



3a. Blades of superior composite falcigers coarsely serrate (Figure 

 30-14c); eyes usually absent. . . .Brania wellf leetensis, p. 30-21 



3b. Blades of superior composite falcigers finely serrate (Figure 30- 

 16d); eyes present Brania swedmarki, p. 30-23 



Brania clavata (Claparede, 1863) 

 Figures 30-9, lOa-e 



Grubea clavata— Fauvel, 1923:296, fig. 114a-e. 

 Brania clavata— Pet tibone, 1963:133, fig. 35b. 



30-16 



