Nemertinea cOc. from the FuIUands. 293 



posferiorly. Tliere is a slight bulbous expansion of the 

 cuticle just before the tip. At the exticnie tip there is a 

 distinct pore, from which there may sometimes be seen 

 issuing a coagulated stream of the secretion from the caudal 

 glands, which are well develo[)ed. 



The minute pore of the excretory gluiid (fig. 1, K.c.P.) is 

 situated close behind the head, the iluct expanding into a 

 slight ampulla (.1///.) just before the opening. 



The spicules of the male (tig. 2, S.) are very slender 

 curved rods ; there is apparently a slender accessory piece 

 (-1./'.) near their distal ends. In the male the posterior end 

 of the body is well provided with diagonal muscle-bands, 

 probably serving to bring about the ventral coiling of the 

 tail. 



In the female the genital organs are characteristic. The 

 vulva is anteriorly placed, and the two branches of the uterus 

 are very unequal, the posterior branch being 4^ times as 

 long as the anterior. Both ovaries are doubly reflexed, i. e., 

 bent back upon the uterus and bent back again upon them- 

 selves near their blind ends. 



This species appears to be common between tide-marks, 

 occurring under stones &c. at Hoy Cove. It agrees with 

 Sttnolairnus man'oni, Southern (1914), and differs from the 

 type-species, S. lepturus, de j\Ian, in the absence of any hairs 

 on the neck besides the cephalic crown of bristles. It may 

 be remarked that no lateral organs are mentioned in the 

 descriptions of either of these species ; it is therefore doubtful 

 whether the rows of pits described above for S. serialis are of 

 generic or only of specific importance. It is possible that 

 the si)ecies should be regarded as belonging to a new genus, 

 with close relationships to Stenolaimus and Anticoma. 



DOLICHOLAIMUS, de Man. 



5. Dolicholaimus vallentini , sp. n. 



The collection includes three examples of a species which 

 is undoubtedly to be referred to Dolicholaimus. Of these 

 specimens, one is a male, one a female with ovaries developed, 

 but containing no fu.l^'-formed eggs, and the third an imma- 

 ture lorm of doubtful sex. 



The toUowing are the measuremenls (in mm.) of" the two 

 mature individuals : — 



Length 3-47 340 



Thickuessi — al crown ol' hairs U275 03 



Ann. cO Mag. N. Ilisl. vSer. 8. Vol. xvii. 2(.» 



