NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 47 



(6); 1134-40 (2); 1135-40 (5); 1142-40 (5); 1143-40 (1); 1159-40 

 (11); 1160-40 (2); 1163-40 (2); 1202-40 (2); 1236-41 (5); 1237-41 

 (1); 1241-41 '(1); 1245-41 (2) ; 1246-41 (1); 1253-41 (15); 1254-41 

 (7); 1256-41 (3); 1261-41 (1); 1267-41 (7); 1268-41 (1); 1275-41 

 (3) ; 1299-41 (1) ; A 13-39 (about 15) ; A 14-39 (about 40) ; A 15-39 

 (4); A 18-39 (2); A 32-39 (1); A 42-39 (about 30). 



Distribution. — H. juvenalis occurs abundantlj^ from southern Cali- 

 fornia, south to Panama, and into the West Indian region through Co- 

 lombia, Venezuela, and the West Indies. Its bathymetric range is from 8 

 to 225 fms, based on these records. 



Genus RHAMPHOBRACHIUM Ehlers 

 Type R. agassizi Ehlers 



Rhamphobrachium is distinguished from other genera of this family 

 for having the first few (3, rarely 2) pairs of parapodia greatly enlarged, 

 directed ventrally and forward, and provided with long, slender, distally 

 curved setae which are prolonged basally and carried far back in the body. 

 The prostomial parts are typical of the family, but the occipital tentacles 

 are proportionately short, blunt. The second apodous ring has a pair of 

 dorsal tentacles. 



Eight species have been described in, or referred to, this genus. They 

 are: 



1. R. agassizi Ehlers (1887, p. 70) from Florida, in 333-539 fms. 



2. R. bipes Monro (1937, p. 293) from the Gulf of Aden, in 91 m. 



3. R. brevibrachiatum (Ehlers) (1875, p. 49) from off western France, 

 in 725 fms. 



4. R. chuni Ehlers (1912, p. 76) from eastern Africa, in 677-1,362 m. 



5. R. diversosetosum Monro (1937, p. 295) from the Maldives, in 183- 

 274 m. 



6. R. ehlersi Monro (1930, p. 126) from the South Shetlands, in 525 

 m. 



7. R. longisetosum Berkeley (1938, p. 428) from Corona del Mar, Cal- 

 ifornia, in 17-33 fms. 



8. R. pacifica Hoagland (1920, p. 618) from the Philippines, in 375- 

 484 fms. 



Most of these species are known through only their original account. 

 It is of interest that Rhamphobrachium is probably largely a deep-water 

 genus and that its species are widely distributed over the earth. Only 2, 

 R. agassizi and R. longisetosum, are known from the Western Hemi- 

 sphere; the first is an abyssal form and is not represented in the collec- 

 tions; the second is present through numerous individuals (below). 



