BY N. A. COBB. 413 



fifteen or twenty such hairs in each row, of which the larger and 

 the larger number occur in front of the anus. The testicles are 

 short, and occur in the second fourth of the body. 

 Hah. — Marine sand, Bay of Naples, 1888. 



2. S. HIRSUTUS, n.sp. Female unknown. 



14 



97- 



• 4 — 7 :§ ^ ^ ^^'^ """• The subcuticula is very finely and 



obscurely striated. Long slender hairs occur throughout the length 

 of the body, but are specially abundant on the anterior part of the 

 neck. The ten cephalic setse are arranged as m fascicidatus, but are 

 here easily confounded with the hairs of the neck growing near by. 

 The neck is cylindrical, and terminates in a truncate-conical head. 

 The three lips surround a narrow mouth which leads into a short 

 narrow pharynx containing a single small dorsal tooth. The 

 circular lateral organs occur opposite the base of the pharynx, 

 and are one-third as wide as the head. There are no organs of 

 vision. The oesophagus is at first two-thirds as wide as the neck, 

 but soon becomes reduced to one-half as wide as the neck and so 

 continues. The two submedian salivary glands empty into the 

 pharynx ; I did not discover the outlet of the dorsal gland. The 

 intestine is separated from the oesophagus by a distinct constric- 

 tion, and is thick-walled and one-half as wide as the body. The 

 cardia is very large and long. The cells of the intestine are of 

 such a size that six build the circumference. I could find no 

 ventral gland. The lateral fields were one-third as wide as the 

 body. The tail constructed as in fasciculatus, but the elongated 

 caudal glands are here confined to the tail, in the male at least. 

 Supplementary organ and hairs situated precisely as in fascicu- 

 latits, but the hairs less conspicuous. The spicula are not so 

 slender as in fasciculatus, and are one-third as long as the tail, 

 and they are supported by accessory pieces having a more 

 prominent posterior process. 



Hah. — Marine sand, Bay of Naples, 1888. 



IX. Laxus, new genus. 



Laxus is a genus of short necked, slender and flexible worms, 

 inhabiting marine sand ; they are usually much coiled aud slow 



