524 REPORT OF COMMISSIONER 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. Anothersingular 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 inthe surface collections. Very many fine 
species were noticed, but they have not yet been reported upon by Mr. 
Rathbun, 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 (Bolocera Tuedie) 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. Strémii) 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 Scalpellum, allied to S. 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 (C. 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 Hyalinecia 
artifexe V. (figs. 177-179a), which inhabits and drags about a large, quill- 
like, free tube, 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 abyssi- 
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. polybranchia 
V., fig. 180, L. vivida, &c.), which inhabit irregular, rough, parchment- 
like tubes, very common in 100 to 300 fathoms. Nothria conchyphila 
