REPORT ON THE GEPHYREA. 11 



Sipuncuhis obscunis, Quatrefages, Histoire naturelle dcs Annel^s marins et d'eau doiico, t. ii. 

 p. 216, pi. xvi. figs. 16, 17, 1865. 



Phuscoloaoma validuiii, Th6el, Etudes sur les Gcpb^Ticns inermes dcs mors de la Scaiidiiiavio, du 

 Spitzberg efc du Groenland, Bihang til k. Svenska Vet. Akad. Handl., Bd. iii., No. 6, Stock- 

 holm, pp. 7, 8, pi. i. fig. 5, pi. iii. fig. 18, pi. iv. Hg. 20, 1875. 



Phascolosonia luteurn, Th(5el, Ibid., p. 5, pi. ii. fig. 7, pi. iii. fig. 17. 



Phascoloscmia harveiji, Koren and Danielssen, Fauna littoralis Norvegise, Heft, iii., Bergen, p. 136, 

 Tab. XV. figs. 41, 42, 1877. 



Phascolosoma vulgare, Selenka and do Man, Die Sipunculiden, &c. {loc. cit.), pp. 20-23, Taf. i. 

 fig. 1, Taf. iii. figs. 25-34, 1883. 



* 



The body is nearly 100 mm. long, the slender proboscis measures about the same. 

 The thin skin is smooth except at the posterior extremity and at the base of the proboscis 

 where there are numerous cylindrical papillae, measuring up to 0'1.3 mm. in height, and 

 becoming gradually smaller towards the mouth. There are about thirty-six tentacles, 

 which are heart-shaped in cross section. The hooks are scattered, of irregular shape, 

 mostly somewhat bent, and about 0'15 mm. long. Three fixing intestinal muscles, 

 inserted on the gullet, on one of the first coils, and on the rectum. The proboscis has 

 four retractor muscles. Those which are ventral spring from the anterior portion of the 

 median third of the 1)ody, while those which are dorsal arise between the former and 

 the anus. 



Habitat.— RM.'^. "Porcupine," Station 30, August 2, 1870; lat. 36° 15' N., 

 long. 6" 52' W. ; depth, 386 fathoms : and Station 90, 1869 ; lat. 59° 41' N., long. 7° 34' E. ; 

 depth, 458 fathoms. This latter form might be considered as a variety of the ordinaiy 

 Phascolosoma vulgare. Hitherto this species has been found in the Mediterranean, on 

 the west coast of Europe (St. Vaast la Hongue, St. Malo, Koscofi", Bergen, North Sea), 

 on the English coast, and in the Eed Sea. 



7. Phascolosoma vulgare, var. astiita, nov. 



This variety, above referred to, difiers from the typical form in having the whole bod}' 

 studded with papillas, and not merely the anterior and posterior portions. 



8. Phascolosoma pudic urn, n. sp. (PI. III. figs. 14-16). 



This species bears a most marked resemblance to the Phascolosoma vulgare of 

 de Blainville, both in habit and in anatomical structure, but is distinguished both 

 from it and from the Phascolosoma vulgare asttitum by the following charactera : — the 

 hooks are not scattered, but are arranged in distinct rows, the papilla3 cover the 

 whole body including the proboscis, the tentacles are less numerous (1 counted at most 

 twenty). 



