6 
THE VOYAGE OF H.M.S. CHALLENGEPv. 
those represented ; and all the characters are better marked in the large examples from 
Greenland. The latter very well bear out Oersted’s original remark — to the effect that the 
branchiae are two or three lobed. In the present specimen, however, the organ next the 
dorsal median line is sometimes quadripartite. GErsted also observes that there is no 
dorsal cirrus, but near the base of the latter branchial process is an organ which seems to 
be the homologue of the cirrus in the other forms, and which he had overlooked. This 
species is entered in the American fauna by Stimpson,’ who states that it is not uncommon 
on muddy bottoms. It is not mentioned by Prof. Verrill in his dredgings on the coast 
of New England ; and no example was obtained by Mr. Whiteaves in the Gulf of 
St. Lawrence, though the other forms procured at this Station closely resembled those 
from the latter region. In this form the nerve-cords seem to be placed farther inwards 
than in Euphrosyne foliosa, or than in Euplirosyne capensis. The layers of the body- 
wall — cuticular, hypodermic, and muscular — are largely developed. The proboscis has a 
well-marked chitinous layer (usually thrown into numerous wrinkles in the preparations) 
just within its external investment in situ. In his excellent brochure on the Annelids of 
Denmark,^ Tauber includes this species, but he labours under a misunderstanding in 
comprising Hipponoe jeffreysii as a synonym. 
Family Amphinomida:. 
Few representatives of this family were procured by the Challenger. In Grube’s 
Annulata CErstediana three are noticed. Sixteen are mentioned by Kinberg, but it is 
doubtful how many of these came from the voyage of the frigate “Eugenie.” Four occur 
in Grube’s list from the ship “ Gazelle ” ; while five are included in Semper’s PhilqDpine 
series of the same author. Schmarda describes nine. The moderate number obtained by 
the Challenger probably depended on the prevalence of the common kinds amongst 
the shore rather than the deep-sea fauna, though the occurrence of others as surface- 
forms doubtless increased the list. They are chiefly southern, though the patient and 
successful labours of the elder Sars and those of his distinguished son have added two 
species to the northern fauna, viz., Euryihoe horealis Parampliinome pulcliella,^ both 
ranging to the British shores. Moreover, both forms occur occasionally in deep water 
(about 600 fathoms) while extending to comparatively shallow water, or, in the case of 
Euryihoe horealis, to the tidal region. Those procured by the Challenger with one 
exception do not pass to a greater depth than 100 fathoms, several inhabiting the 
littoral region. The exception, however, is marked, for Chloenea atlantica, n. sp., descends 
to no less a depth than 1525 fathoms. 
1 Marine Invertebrata of Grand Manan, p. 36. ^ Annulata Danica, Kjobenhavn, 1879, p. 78. 
3 On some Eemarbable Forms of Animal Life, &c. i., 1872, p. 45. This species was probably first described by the 
author from specimens procured off Shetland by Dr. Gwyn J effreys, vide Trans. Boy. Soc. Edin., vol. xxv. p. 406. 
