NO. 3 HARTMAN: POLYCHAETOUS ANNELIDS 331 



complete oval whorl) of 18 to 24 of these long spines, but all are similar 

 to one another in form, color, and thickness. Under high magnification 

 the tip is seen to be minutely pilose. There are 18 pairs of paleae in the 

 outer set; the inner has only about 10 pairs. The membrane immediately 

 surrounding the paleae is strongly fringed, with about 18 filaments on 

 each side, those along the ventral end are both longer and more crowded 

 than those more superior. 



The first setiger, at the sides of the oral aperture, has a few long, 

 slender, hairlike setae and a pair of long, triangular cirri about two thirds 

 as long as the palpi. The next (second anterior thoracic) segment has 

 dorsal and ventral cirri and a dorsal branchia, but seemingly no setae. 

 The next 4 segments (parathoracic) have each a long fascicle of slender 

 setae ventrally and a transverse series of paleae dorsally, in addition to 

 cirri and branchiae. 



Phalacrostemrna is a small genus, known through only 3 species, 

 including the type, P. cidariophilum Marenzeller (Fauvel, 1927, p. 212) 

 from the Mediterranean Sea, P. elegans Fauvel (1914, p. 270) from 

 near Madeira in 1,968 meters, and P. setosa (Treadwell). 



Distribution. — Known only from Hawaii, in 253-382 fms. 



Genus LYGDAMIS Kinberg 

 Type L. indicus Kinberg 



(Includes Eupallasia Augener and Monorchos Treadwell.) 

 The operculum is well developed, provided with paleae arranged in 

 2 apparent rows. There are one or more pairs of heavy, nuchal hooks on 

 the dorsal side. Oral tentacles and palpi are well developed. The thorax 

 consists of 2 anterior thoracic, and 4 paleal-bearing, parathoracic, seg- 

 ments. 



The following species are believed to belong to this genus. 



1. Lyffda?nis asteriformis (Augener). 



2. " ^frtr^/i (Mcintosh) from western Australia. 



Originally described as Sabellaria (Pallasia) giardi Mcintosh ( 1885), 

 it has been referred to Lygdamis by Johansson (1927, p. 86), al- 

 though Augener (1927, p. 236) had erected a new genus, Eupallasia, 

 for it. I accept the conclusions of Johansson. 



3. Lygdamis indicus Kinberg (Johansson, 1927, pp. 84-86) from the 

 Indo-Pacific. 



4. Lygdamis muratus (Allen) (Johansson, 1927, pp. 83-84) from the 

 north Atlantic. 



5. Lygdamis nesiotes {Qh?ivr^Qr\m). 



