300 ANNELIDA POLYCH.ETA ANDREWS. 



lowing four are new to America: SylUs S2)ong icola Griibe^ Proeercea 

 ornata Mar. and Bob., P. rubropunctata Langerlians, Dasybranclms 

 caduciis. 



Four genera are represented in the Beaufort fauna not previously 

 known to occur in America: Ophelina, Dasyhranchu.s, Petaloproctiis, 

 Lohnia; while Ammochares is known only as mentioned in a list of An- 

 nelids dredged in the Gulf of iMaine by Professor Verrill (Am. Jour. Arts 

 and Sci., v. 7, 1874, p. 411) and is a member of a family, 4-mmocharid(c, 

 not otherwise represented on the coast of the United States, as far 

 as known; a fragment belonging to this genus was, however, found 

 in Virginia. Of the twenty-four families represented, the SylHdce 

 have six, the Eunicid(e have seven species, while the Maldanidce are 

 represented by four; however, the forms living in sand are probably 

 unduly emphasized in this collection, since the unusually large areas of 

 sand flat nearly exj^osed at low tide furnished such advantages for 

 collecting such species, especially in the warm waters of that coast, 

 that other localities were less visited. From Ehler's monograph upon 

 the Blake collection, and from a collection I have made at Green Turtle 

 Cay, Bahamas, it would seem that the Eunicidw is the most richly 

 represented family along the warm coasts of the southern United States 

 and neighboring islands. 



Besides the adult Annelids- given in the above list young and larval 

 forms were taken in the tow net, often in great abundance. Among the 

 most beautiful of these were immature siiecimens of Tomopteris:, re- 

 sembling T. Rolasi Greef, taken on several occasions in the inlet. 



Young Lepidonotus with long provisional seta" were common, as were 

 the larvjie of Chnetopterus. Nereis, as egg, larva and young, was abun- 

 dant; the eggs and early larvii3 being conspicuous as having large oil 

 drops in the transparent floating cells surrounded by invisiblejelly. 



One of the most interesting and abundant forms in the tow net is the 

 young of Loimia turgida. It floats about inside a gelatinous tube longer 

 than the body and much thicker than those figured by Claparede as oc- 

 curring about young Terehella conchylega. In such larvi^e the otocysts 

 are conspicuous, anterior to the first pair of setaj; the tentacles come 

 in gradually in pairs, one each ^^ide of a longer median one ; colored 

 si^ots appear early upon the tentacles ; the branchiae appear from be- 

 fore, posteriorly, at first as simple tubercles; two large and numerous 

 small pigment spots are present. 



A young Arenicola was found in a similar gelatinous tube ; here also 

 large otocysts are present, one on each side, dorsally, in the anterior part 

 of the buccal somite; each contains a single large otolith. 



Young Scoloplos, Euylycera dihranchiata V., and many unknown 

 larvpe, were taken. The Spionidiie were especially well represented in 

 surface collections, several forms of Polydora, a Xeriue, a Priouospio 

 with pinnate branchiae and tentacles, and the remarkable larva? of 

 Magelona almost identical with those figured and described by Cla- 



