344 OX A COLLECTION OF ECHITJRIDS, WITH AN ATTEMPT TO 



Species 8. Echiurus unicinctus. Von Drasche. 



Von Drasche. Verh. Ges. Wien. Vol. xxx. 1881, p. 621. 

 Selenka. Challenger Reports. Vol. xm. Pt. XXXVI. 1885, p. 6. 

 Fischer. Abh. Ver. Hamburg. Vol. xm. 1895, p. 21. 



Length of body averages 8'5 cm., length of proboscis, 5 — 6 mm. when contracted. 



Colour, bright yellowish brown. 



Papillae uniform in size, only arranged in transverse rows in special places, e.g. near 

 the hooks. Single circlet of bristles, usually 11, but any number from 9—13 has been 

 found. 



Circular muscles consist of some 200 bundles frequently anastomosing. 



Nephridia, two pairs, with spirally coiled internal openings. 



Locality. Inland Sea, Japan, " Amurlande " I Amur Bay. This species is found in 

 the mud near the shore. It is used by the Japanese fishermen as bait. 



Genus III. HAMINGIA. Koren and Danielssen. 



The authors of this genus named it after Hamingja, "the Fortuna of Northern 

 Mythology." 



Species 9. Hamingia arctica. Koren and Dauielssen. 



Koren and Danielssen. Norwegian North Atlantic Expedition: Zoology, Gephyrea, 



1881, p. 20. 

 Horst. Neclerl. Archiv ZooL, Supplementalband, I. 1881. 

 Lankester. Ann. Nat. Hist. Ser. v. Vol xi. 1883, p. 37. 



Synonym. Hamingia glacialis, Horst. 



Length of body of female, 12 cm., diameter, 2 cm., length of proboscis, 15 ins. or " as 

 long as the body" in Lankester 's specimen. The proboscis is not forked. 



The genital setae are absent in the female. 



Colour, light or dark grassy green. 



Longitudinal muscles, continuous. 



Nephridia, single or one pair, each opens on a well-marked papilla. 



Anal trees, branched, twice or thrice before ending in funnels : brown. 



The males resemble those of Bonellia viridis, but have hooks like those of B. pumicea 

 and B. minor, but the vas deferens opens in front of the hooks in Hamingia. They 

 occur in the dilated pharynx of the female. 



Locality. Two hundred miles north of the North Cape, and in the Hardanger 

 Fjord, Lat. 60 at a depth of 40 fathoms. 



