986 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
and the lateral nerves (fig. 5, a). Such cysts commonly exceed the lateral nerve in diameter, and in 
one specimen were scattered irregularly through the posterior portion of the esophageal region backward 
into the intestinal region. Not all of the cysts contained the parasites, however, and in some cases the 
parasitic worms were found imbedded in the body walls, principally in the outer longitudinal muscular 
layer (fig. 5, x). When found in other places than in the cysts referred to the parasites were quite 
free among the tissues, presenting an appearance as if they had wandered from the cysts toward the 
exterior of the body. The cysts themselves are composed of an irregular network of fibrous tissue 
supporting numerous large, oval nuclei. A firmer layer of the same tissue makes up the external wall 
of the cyst, which is completely filled with tissue except for the space actually occupied by the parasite. 
Occasionally two or three such parasites were found in a single cyst (fig. 5, a). In the second specimen 
sectioned only a few such cysts were present. The length of the parasitic nematode varies, from 0.2 
to 0.3 mm.; the width is about 0.017 mm. 
Habitat. — Dredged in 21 to 28 fathoms in Auau Channel, between Maui and Lanai islands (station 
3874). Bottom composed of sand, pebbles, and shells; temperature 75.3° F. Also dredged in 28 to 
43 fathoms near same locality (station 3876). Bottom composed of sand and gravel, with a tempera- 
ture of 74° F. 
The species is therefore known only from the Hawaiian Islands. 
Drepanophorus sp.? 
The genus Drepanophorus is represented in this collection by a single proboscis only, so that the 
specific identity of the form represented remains unknown. The preserved proboscis measures 
33 mm. in length and 4 mm. in diameter. It must therefore have belonged to a worm of fairly large 
size. The armature was not well preserved. The general features of basis and stylets could be made 
out, but no details of structure. It is provided with 26 large and conspicuous nerves. 
The color of this proboscis is described as uniform rose pink in life, but is colorless after 
preservation. 
Apparently no species of the genus has been heretofore found which had exactly 26 proboscidial 
nerves, although the widely distributed D. spectabilis has 24, and several other forms 30 or more. 
This proboscis was collected at station 4117, off the northwest coast of Oahu Island, at a depth of 
between 253 and 282 fathoms. The bottom at this locality was composed of coral sand and foramini- 
fera, and had a temperature of 45.6° F. 
It is unfortunate that the worm itself was not obtained, for it would be extremely interesting to 
determine whether a representative of a genus in which the ocelli are usually so highly developed 
would retain them unimpaired at a depth of more than 250 fathoms, where it must live in absolute 
darkness. It may be noted in this connection that Punnett has recently found a species of Lineus a 
living in the fjords of Norway at a nearly equal depth which has numerous small ocelli. He looks 
upon this as a recent immigrant from shallower arctic seas into the deeper waters of the fjords, because 
most other deep-water nemerteans have been found to be destitute of ocelli. 
EXPLANATION OF PLATE. 
Tseniosoma univittatum sp. nov. 
Fig. 1. Preserved specimen moderately extended; 
X 5. 
2. Preserved specimen strongly contracted; 
X 5. 
Fig. 3. Dorsal side of head and anterior portion 
of body, showing position and anterior 
extent of dorsal longitudinal marking; 
X 8. 
Tseniosoma cingulatum sp. nov. 
Fig. 4. Specimen preserved in a well-extended 
condition; head and anterior portion of 
body seen from lateral surface; X 3. 
5. Preserved specimen somewhat contracted; 
position of head as in preceding figure; 
X 3. 
Fig. 6. Head and anterior portion of body of con- 
tracted specimen more highly enlarged; 
showing numerous ocelli on lateral 
margin of head; to, mouth; X 6. 
L. cinereus Punnett, Bergen’s Museum Aarbog, 1903, p. 17. 
