58 Prof. Ehlers on the Vermes 



surface, on the dorsal surface convex, emarginate towards 

 the following segment ; the next segments three times, and 

 those of the middle of the body once and a half as broad as 

 long; extremity of the body linguiform, depressed, with 

 greatly abbreviated segments, and a broad anal furrow, which 

 extends for a distance of 2 "5 millims. over nine segments. 

 Ventral furrow sharp on the ventral surface of the posterior 

 part, deviating to the left on the ninth segment ; on the back 

 of the first eight segments a distinct faint longitudinal furrow. 

 Ventral scutes broad, rectangular, contiguous. Setae yellowish 

 red, especially on the hinder part of the body, slender, with a 

 narrow wing-like border, and shorter and rendered almost spa- 

 tuliform by a broad wing-border; the bundles formed by 

 them increase considerably in length on the hinder segments, 

 and are directed forwards, lying close to the body. Uncini of 

 the anterior segments with a long shaft and the point bent at 

 a right angle, its edge being finely serrated ; those of the pos- 

 terior segments short, with a broadly dilated base and a strong 

 terminal hook, the edge of which is serrately denticulated. 

 Each half branchia formed of 9 rays, which are united for 

 more than half their length by a membrane ; with fine, slender 

 branchial filaments, which extend to the apex of the bordered 

 branchial ray, but here become very short. On each side four 

 slender tentacular cirri. The tube of the worm clothed with a 

 black coat of mud. 



As I cannot identify this animal with any of the described 

 species, I propose for it the above name, and remark further 

 that the remarkable shortness of the branchiee and the very 

 striking coloration of the setse suffice for its recognition at the 

 first glance. In habit the animal most closely resembles the 

 Euchone rubrocincta (Sars), figured by Malmgren, from which 

 it is distinguished by the two forms of straight setse and by 

 the number of branchial filaments and tentacular cirri. It is 

 equally easy to distinguish from Euchone analis (Kr.) and E. 

 tuberculosa (Kr.), which are found near Spitzbergen — from the 

 former by its general habit, as well as the form and number 

 of the branchial filaments and tentacular cirri, and from the 

 latter essentially by the different nature of the ventral scutes. 



Gephyrea. 



Phascolosoma (Erstedii (Kef.). Zweigletscherbucht. 



There is one specimen which agrees, within a few details, 

 with the description of P. (Erstedii given by Keferstein 

 (Zeitschr. fur wiss. Zool. xv. 1865, p. 436). From the end of 

 the body to the anus the animal is 17 millims. in length, and 

 in this portion it has a thickness of 4 millims., whilst the 



