Benham. — Further Notes on the Sipunculids of N.Z. 303 



to institute any detailed comparison is the antarctic form, 

 P. capsiforme, Baird,* and the varieties described by Michaelsen.f 

 From this species it differs in several important respects, and is 

 quite distinct from it. 



Sipunculus, Linnseus. 

 S. maoricus, n. sp. 



Two individuals were forwarded to me by Mr. Suter. They 

 were found washed up on the beach at Tauroa Point, Ahipara, 

 near Cape Maria Van Diemen. They had apparently dried up 

 to some extent before being preserved, as the skin is tough and 

 hard, and the internal organs are not sufficiently well preserved 

 to be described. 



Colour. — Pale-yellowish ; perhaps somewhat translucent when 

 alive. 



Dimensions (Plate XV., fig. 3). — Total length, 116 mm., of 

 which the introvert occupies 12 mm. ; the diameter of the body 

 at about the middle is 10 mm., and the base of the introvert 

 measures 4 mm. J The anus lies 6 mm. below the base of the 

 introvert. Thus the length is about 11| times the breadth, and 

 the introvert is about one-ninth of the total length. 



General Description. 



The body is, as always in this genus, marked with distinct 

 circular and longitudinal furrows, dividing the surface into a 

 number of rectangular areas (Plate XVI., fig. 13) ; the circular 

 furrows and ridges being more conspicuous in that part of the 

 body which is contracted, the longitudinal ones where it is less 

 contracted. The hinder end of the body is slightly pointed, and 

 here the longitudinal ridges are most conspicuous, converging 

 to the mammilla-like tip. 



The introvert, which is partly retracted in both specimens, 

 is for the greater part of its extent covered with recurved hook- 

 like tubercles, which are white (Plate XVI., fig. 11). These are 

 not arranged in any very definite manner, though partly they 

 form oblique rows. The tubercles are rather larger dorsally than 

 ventrally, and also diminish slightly in size as the tentacles are 

 approached, at the same time becoming softer. Between the 

 tentacular crown and the tubercles is a naked area about 2 mm. 

 or 3 mm. in extent (Plate XVI., fig. 7). Each of the hook-shaped 

 tubercles§ has an irregularly rounded but wrinkled apex. It is 



* Fischer, " Gephyreen," Hamburg. Magalhaen. Samnielr., 1896. 



■f" Michaelsen, " Die Gephyr. v. Sud-Georgien." Jahrb. Hamburg. 

 Wiss. Anstalt vi., 1889. 



J In inches this is about 4J in length by § in diameter. 



§ The word " papilla " has been used for glands immersed in the body- 

 wall ; otherwise it would seem a more suitable word to use in the present 

 connection. 



