320 



Dr. J. Gwyn Jeffreys on the 



[June 15_, 



very gradually from the anterior to the posterior end, contrasting in 

 this respect with the more decided diminution in B. arietina. The oval 

 aperture (fig. 2) forms a smooth slightly constricted rim, which is narrower 

 than the tube almost by the depth of the ridges. The latter are eight in 

 number, and run from the anterior to the posterior end of the tube, 

 though, it must be added, none of the specimens w^ere quite perfect. It 

 was obtained from station No. 12 (1450 fathoms). It differs from any 

 other Ditrypa known to me in its slender form and the well-marked 

 longitudinal ridges. 



A curious form, the affinities of w^hich have not 3''et been made out, 

 occurs at station No. 6 (410 fathoms). The head forms a blunt cone, 

 with two short tentacles near a large eye-speck on each side. The seg- 

 ments are deeply cut. The dorsal division of the foot has a single large 

 hook (somewhat resembling that figured by the late M. Claparede in 

 Dr. Ehlers's recent paper* on the ' Porcupine ' deep-sea species). The 

 ventral bristles taper to a flattened tip with a minute claw. A series of 

 small papillae occur on the foot and on the conical cirrus beneath the dorsal 

 hook. 



Station. 



1875. 

 No. 1. July 22 



No. 3. July 23 

 No. 4. July 24 



No. 5. July 26 



No. 6. Aug. 10 



Depth 

 in fms. 



Position. 



175 



100 



20 



60 



410 



70 30 N., 

 54 41 W. 



OffHare Is- 

 land, Disco 



69 31 N., 

 56 1 W. 



67 50 N., 

 55 27 W. 



66 59 N., 

 55 27 W. 



64 5 N., 

 56 47 W. 



Character of 

 bottom. 



Sandy mud. 



Sandy mud. 



Shell-sand. 



Sand & shells. 



Sandy mud. 



Species. 



Euphrosyne borealis, Eupolynoe occi- 

 dentalis, Nephthys incisa, Nereis zo- 

 nata, Nothria conchylega, Lumbrico- 

 nereis fragilis, Trophonia plumosa, 

 Scolecolepis cirrata, Maldane biceps, 

 Nicomache lumbricalis. 



Nychia Amondseni, Nephthys incisa, 

 Nereis zonata, Nothria conchylega, 

 Lumbriconereis fragilis, Prionospio 

 Steenstrupi. 



Harmothoe imbricata, and fragmentary 

 Nephthys, sp. n., Phyllodoce Grroen- 

 landica,Eteone pusilla,Nereis pelagica, 

 Glycera capitata,three sp. of Aricia, 

 Scoloplos armiger, Ophelia limacina, 

 Spio, sp. , Capitella capitata, Ampharete 

 arctica, Euchone analis, Chone infun- 

 dibuliformis, Amphiporus. 



Harmothoe imbricata and rar., Eteone 

 pusilla, Eulalia, sp., Nereis pela- 

 gica, Nothria conchylega, Owenia 

 filif ormis, Leeena abranchiata, Spiror- 

 bis spirillum, Amphiporus as before. 



Erarne impar, Nereis pelagica, Lum- 

 briconereis fragilis, Eunice limosa, 

 Aricia Ouvieri, Scolecolepis cirrata, 

 Leeena abranchiata, Grymsea Bairdi, 

 Terebellides Stromi, a remarkable 

 form with dorsal hook, Chsetoderma. 



* Zeitsch. f. wisa. Zool. xxv. Ed. i. Taf. i. f. 13. 



