MR. E. R. LANKESTER ON NEW BRITISH POLYNOINA. 375 
HARMOTHOË MALMGRENT, n. sp. 
Corpus oblongum, ovatum, postice attenuatum ; somitibus truncalibus 37. Lobus cepha- 
licus latior quam longior, margine antico recte inciso, nec lateraliter producto; ocu- 
lis 4, duo anteriores laterales, duo posteriores in vertice. Antennæ longitudine 
lobi cephalici, articulis basalibus. Tentaculum antennis ter longius, articulo basali 
elongato. Cirri peristomiales magnitudine et formá tentaculi, articulo basali valde 
elongato. Cirri buecales conspicui. Palpi permagni, crassi, apice attenuati. Elytra, 
primo pari suborbiculari excepto, ovali-reniformia, glabra, tenuissima, pellucida. 
Setze notopodiales setis H. imbricate simillimæ. Setze neuropodiales long, tenues, 
spinulis longis usque ad apicem armate. 
Color.— Elytra sine colore. Setze fulvæ. 
Longit. 50 millim. 
Latit. 10—11 millim. 
. Hab. in tubulis Chetopteri insignis ad oras insule Hermi. 
Tab. LI.. fig. 11. Pars cephalica, aucta ; fig. 25. Elytron, auctum ; fig. 28. Seta neuropodialis, aucta. 
This species, which I have named after M. Malmgren, who has done so much good 
work among the Annelids, as well as in other branches of zoology, was found in the tube 
of a Chetopterus, which is by no means rare at Herm. It appears to be only met 
with in this habitat, and I would just draw attention to the fact that nearly all the 
Polynoina are thus parasitic *. Dr. Baird mentions a species of Lepidonotus as occurring 
in the tubes of a Chetopterus from Anglesea (which he has called Ch. insignis), and 
I have seen the specimens in the British Museum; it is, however, quite distinct from 
H. Malmgreni, and much more closely allied to H. imbricata (L. cirratus). The horizontal 
direction of the anterior margins of the cephalic lobes, and the absence of anything like 
a prolongation of their frontal margins, together with the presence of a large basal pro- 
tuberance for the antennæ, are the points chiefly noticeable in this species. The scales 
also are of very great tenuity. The colour and form also of the cirri and their homo- 
logues are characteristic. 
AxTINOÉ (Kinberg). 
Antennæ arising from the base of the tentacle, which occupies a frontal incision of 
the cephalic lobe. Palps subulate, densely covered with very minute papille. Elytra 
fifteen pairs (in smaller forms only thirteen to fourteen), covering the whole back. Noto- 
podial setze divaricate, towards their extremity densely transversely spinulose, (excepting 
the innermost) a little curved, shorter and much broader than the setæ of the neuro- 
podium; these are capillary, numerous, spinulous, much elongated, with a very fine 
apex. Two pygidial cirri beneath the anus. 
ÁxTINOÉ NOBILIS, n. sp. p y i 
Corpus oblongum, utrinque fere equaliter obtusum ; somitibus truncalibus 30-36. Lobus 
cephalicus æque longus ac latus, antice et postice valde incisus, antice in duas 
prominentias conicas productus; oculi 4, duo postice in vertice, duo antice majores 
* Prof. Huxley mentions a species in his lectures which he has called P. astericola, from its +. Uraster. 
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