58 
THE VOYAGE OF H.M.S. CHALLENGED. 
astericola, Delle Chiaje vitiates M. de Qnatrefages’ diagnosis between the Acoetidse on 
the one hand and Polynoe and Lepidonotus on the other. 
It is curious that no example of Harmothoe imhricata has appeared in the collection, 
yet Marenzeller mentions it from Southern Japan, and Grnbe describes it from Sitcha and 
the Sea of Ochotsk in Middendorfs Eeise. I also agree with Ehlers and others in 
thinking that there are not sufficient grounds for the view of Mobius ^ that this common 
form includes as mere varieties Evarne impar, Johnst., LcBiiilla glabra, Mgrn., Antinoe 
sarsi, Kinberg, and others. Such an opinion could only arise from an imperfect examina- 
tion, and with limited means of observation. It is sufficient at present to allude to the 
identity of the minute structure of both dorsal and ventral bristles in the males and 
females of such as Polynoe magnipalpa. Mobius has been followed to some extent l)y 
Tauber ^ and Levinsen ® in the classification of the Poly noidae, especially the former, who 
adds LcBiiilla mollis, Lcenilla alba, and Lagisca propinqua as varieties of Harmothoe 
imbricata. Pie has, however, already been corrected by Dr. Hansen.^ The classification 
of G. Levinsen will be referred to elsewhere. 
Iphionella, n. gen. 
I'phionella cimesc, De Qnatrefages (PI. IX. figs. 4-6 ; PI. XVII. fig. 3 ; PI. VIIIa. 
figs. 7, 8). 
T^lvione cimex, De Quatrefages, Anneles, i. p. 270. 
Habitat. — Dredged at Station 214 (a little south of Mindanao, one of the Philippine 
Islands), February 10, 1875; lat. 4° 33' N., long. 127° 6' E.; depth, 500 fathoms; 
bottom temj)erature 41°'8, surface temperature 80°'5 ; blue mud. 
At first sight, and judging only from the description of Kinberg and De Quatrefages, 
no definite distinction could be made out, but a critical investigation after the method 
used in previous examinations brought out the salient points. It is a somewhat hard 
form, possessing the appearance of certain Chitons, and its scales have a light yellow colour 
and a smoother aspect than those of Iphione muricata. Moreover, the outline is more 
ovate. The length of the single example is 13 mm., and the total breadth is 9 mm. It 
is therefore somewhat less than the specimen described by De Quatrefages. 
The body is rounded dorsally, and somewhat flattened ventrally. Along the 
dorsal arch, after removal of the scales, is a double row of small tubercles or short 
papillae. 
The head diverges even more than in Iphione muricata from that of the Polynoiclse, 
for instead of the hollow which occupies the site of the base of the tentacle in Savigny’s 
1 Exped. auf Pommerania, &c., p. 111. ^ Annulata Danica, p. 80. 
^ Nordiske Annulata, &c., 1883, pp. 27-39. ^ Deii Norske Nordhavs-Exped., p. 2. 
