524 EEPOET OF COMMISSIONEE OF FISH AND FISHERIES. [22] 



but these groups have not yet been fully examined. Among the Isopods, 

 one of the largest and most common is Syscenus infelix Harger (fig. 164), 

 which is orange in color. Another singular species is Astacilla granulata 

 Harger (fig. 165). 



The Copepoda and Ostracoda are very abundant, both in the lots ob- 

 tained in the trawl- wings and in the surface collections. Very many fine 

 species were noticed, but they have not yet -been reported upon by Mr. 

 Eathbun, who has charge of these groups. He has studied a number 

 of interesting and novel forms of Lerneans found parasitic on several 

 of the deep-sea fishes. A representative of this group {Antheacheres 

 Dubenii Sars, figs. 166, 167), which lives in the stomach of the large sea- 

 anemone {Bohcera Tuediw) has been referred to on a previous page [p. 

 12]. 



The Cirripeds were represented in deep water by several species of 

 Scalpellum and allied genera, most of them of small size ; one of these 

 {S. Stromii) occurs frequently on the deep-sea gorgonian corals. Two 

 or three species of this group live upon the large crab, Geryon quin- 

 quedens, some of them on the exterior and some in the gill-cavity. A 

 large species of 8calpellum, allied to 8. regius W. Thomson, was taken 

 several times in deep water on Brown's Bank, off Nova Scotia ; and 

 large clusters of Balanus Hameri were dredged on the shallower parts 

 of that bank. 



PYCNOGONIDA. 



The Pycnogonida were well represented by two or three very large 

 species of Colossendeis and other genera, in 900 to 1,500 fathoms. Some 

 of the largest of these ((7. colossea Wilson, fig. 169) measured nearly 2 feet 

 across the outstretched legs. Nine of them were taken at one haul in 

 1,106 fathoms. It is orange- colored in life. 



ANNELIDA. 



The Annelida are well represented at all depths, but yet they appear 

 to be relatively much less numerous below 500 fathoms than in shallower 

 water. In 100 to 300 fathoms they are usually abundant. The most 

 conspicuous species, as well as one of the most abundant, is Syalincecia 

 artifex Y. (figs. 177-179a.), which inhabits and drags about a large, quill- 

 like, free 1»ube, often 8 to 10 inches long, open at both ends, and so translu- 

 cent as to show the large iridescent annelid within it. This is frequently 

 taken in very large numbers, several thousands coming up in a single 

 haul, in 150 to 640 fathoms. Two species of Actinians (Sagartia ahyssi- 

 cola and the young of Actinauge nodosa) are very often attached to these 

 tubes, and also various hydroids and sponges. 



There are also two or three large species of Leodice [L. polyhrancMa 

 v., fig. 180, L. vivida, &c.), which inhabit irregular, rough, parchment- 

 like tubes, very common in 100 to 300 fathoms. Nothria conchyphila 



