DB. BAIBD ON SKVEBAL GENEEA OP EUNICEA. 355 



Tentacular cirri of moderate length, arising from under the dorsal 

 edge of buccal segment. Tentacle, antennse, and palpi strongly 

 annulated on the lower portion or root, which is of considerable 

 length. 



Sp. 1. DiOPATKA AMBOINENSIS. 



Diopatia amboinensis, Audouin Sf M.-Edwards, Litt. de la France, ii. 

 15G, tab. 3a. figs. G-8; Grube, Quatrefages, Sfc. 



In this species, of wliich wc possess only one specimen, the 

 simple seta) of the feet are of two kinds— one shorter than the 

 other, slightly elbowed near the point, which is very acute, the 

 other much longer, lanceolate, and indistinctly or very minutely 

 serrate on the margins. Pectinate setse numerous, the broad 

 head on which the teeth are placed, with its pectinations, being 

 disposed obliquely. There appear to be two uncini or hooldcts 

 to each foot, of a stout form, and forcipate at extremity, but no 



acicula). 



Hah. Amboiua, M.-Edwards. (No habitat to our specimen.) 



Genus III. Tbadopia, Baird. 

 Branchife pectinated. Tentacular cirri placed on dorsal part 

 of buccal segment. Tentacle, antennae, and palpi strongly annu- 

 lated on inferior or basal portion, which is more than half the 

 length of the whole organ. 



Sp. 1. Tradopia maoulata, Baird. 



Body about 8 inches long, narrow, tapering gradually to the 

 tail. Eather flat on dorsal surface, and somewhat convex ante- 

 riorly on the ventral surface. Head rather small. Antennules 

 very short. Tentacle, antennse, and palpi very diiferent from 

 each other in length : tentacle and antennse short, of about equal 

 length; palpi long, nearly double the length of the antenna?. 

 These organs are all finely and closely annulated on the basal por- 

 tion, which is marked anteriorly with a row of dark spots through- 

 out its whole length, are rather thick, and at least double the 

 length of the anterior or terminal portion, which is short, smooth, 

 and filiform. The tentacular cirri are short and slender, placed 

 on dorsal portion of the buccal segment. The anterior feet are pro- 

 minent and project upwards. The branchia) are pectinate, com- 

 mencing on the first foot, at first consisting only of two branchlets 

 or filaments, but after the third or fourth becoming more pecti- 

 nate. The tail terminates in two rather short cirri. 



