EEPORT ON THE ANNELIDA. 
235 
This species diverges from Staurocephalus rubrovittatus} Grube, in the structure of the 
bristles, which are much more slender in the new form. The articulated tentacles of 
Staurocephalus rudolphii, D. Chiaje,^ readily separate it from the new species. It more 
nearly approaches Keferstein’s Staiirocephalus ciliatus,^ from which, however, it differs 
in the structure of the bristles and in the absence of the eyes. The new form is 
specially distinguished by the great length of the terminal portions of the bristles. 
Family Lumbeinereida:. 
The Lumbrinereidse are represented by a tolerably numerous series (about fifteen 
different species), several of which are new. In most of the previous voyages examples 
of the family have occurred, though in varying numbers. Thus Grube describes two 
species, in the Annulata (Erstediana, from the coast of South America and the adjoining 
Ocean. Schmarda gives upwards of half a dozen from the most diverse parts of the 
world, but his classification is somewhat confused. A large number (about fifteen or 
sixteen) are described by Kinberg in the voyage of the frigate “Eugenie”; while only 
three occur in Grube’s Annelids of the “ Gazelle ” Expedition. Four genera and five 
species are represented in the latter author’s Philippine Annelids. The species found in 
the Challenger range from tide-marks to very great depths {e.g., 2225 fathoms), indeed, 
Ehlers has already shown that' the common Lumhriconereis fragilis, 0. F. Muller, pro- 
cured in the “Porcupine” Expedition, descends to 1380 fathoms. 
One of the most comprehensive resumes of the group is that of the late Prof Grube,'^ 
whose extensive acquaintance with foreign Annelids peculiarly fitted him for such a 
task. 
In regard to the dental apparatus in this group, the colour, even in small examples, is 
generally of darker hue than in the Eunicidse. The maxillae are characteristically elevated 
in front of the posterior (spathulate) processes, so that the blades curve downward in front 
and the spathulate appendages behind. The horny plates (great dental and lateral) are 
symmetrical. In the usual position in which many are found after preservation, the 
points of the maxillae, and the cutting edges of the great dental plates, are directed upward. 
Moreover, a symmetrical arrangement of the three ventral horny plates (the two lateral 
in front and the great dental plate behind) is visible interiorly. In protrusion of the 
proboscis, again, the lateral plates become external instead of anterior. The mandibles 
are generally ankylosed in front. From the position and curvature of the various parts 
of this apparatus it is difficult to give a fair representation of the parts. 
1 Archivf, Naturgescli., 1855, p. 97, and 1860, char, emend., p. 79. 
^ Memorie s. storia, &c., iii. p. 166 (Nereis di rudolphi) and p. 176, Tav. xliii. fig. 13, &c. 
^ Zeitschr.f. mss. Zool., Bd. xii. p. 99, Taf. viii. figs. 13-19. 
^ Jahres-Bericht. der Schles. Gesellsch.f. vat. Culkir., 1878, pp. 78-109. 
