478 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
TREMATODES. 
5. Distomum hispidum Abildgaard. Intestine. [PI. xxix, figs. 321-323.] 
Taken by the schooner Grampus, south of Marthas Vineyard, in 65 to 10 fathoms, July 30, 1900; 
15. Collected by Mr. C. IV. Stone. These distomes are from 3 mm. to 6 mm. in length. The necks are 
densely clothed with large, coarse spines, and the body covered with short spines; acetabulum much 
larger than oral sucker. Dimensions in millimeters of a specimen in glycerine somewhat compressed: 
Length, 4.26; diameter of oral sucker, 0.17; diameter of acetabulum, 0.45; breadth of body, middle, 
1.16; diameter of anterior testis, 0.5; length of posterior testis 0.77, breadth 0.5; ovum, 0.086 and 
0. 055. mm. in the two principal diameters. So far as these specimens have been studied, they agree 
closely with this species, except that the neck is flattened and tapers gradually but uniformly to the 
bluntly rounded anterior end, instead of being dilated at its middle part. 
Urophycis chuss ( Phycis chuss), Hake. 
FOOD. 
Shrimps and amphipods noted in alimentary canal of one taken in 30 fathoms off Gay Head, 
August 5, 1899. Small crustaceans and lenses of small fish in alimentary canals of four young hake 
taken in Katama Bay, August 30, 1899. 
ACANTHOCEPHALA. 
1. Echinorhynchus acus Rudolphi. Intestine. See 3, p. 525, etc. Aug. 5, 1899, 19 specimens. 
These specimens are smaller and more slender than examples from other hosts, e. g., the flounders, 
but they appear to agree in all essential particulars with this species. 
NEMATODES. 
2. Immature nematodes (Ascar is). Peritoneum. 
A small lot belonging to the U.' S. National Museum collection, collected by the U. S. Fish 
Commission in 1887, agree with those mentioned under Phycis tenuis No. 2. Also found August 5, 
1899, numerous; and August 2, 1900. [PL yi, figs. 53, 54.] Identical with No. 2 under Lopholatilus 
chamseleonticeps and No. 2 under Paralichthys oblongus. 
« 
CESTODES. 
3. Rhynchobothrium. Encysted on peritoneum. 4, p. 796. Also found Aug. 5, 1899. 
TREMATODES. 
4. Distomum ocreatum Moliu. Intestine. See 7 , p. 288, pi. xxxv, figs. 16-24. Aug. 5, 1899; numerous. 
These agree fairly well with this species. The oral sucker exceeds the acetabulum slightly in the 
preserved specimens, which are contracted and measure 1 mm. or less, excluding the appendix. Ova 
0. 024 and 0.014 in the two principal diameters. 
5. Distomum appendiculatum Rudolphi. Intestine. See 7 , p. 289, pi. xxxvi, figs. 25, 26. 
Twenty-one distomes from two young hake, seined in Katama Bay, August 28, 1900, are to be 
referred to this species. They were very active and variable in form. At rest the length is about 2.6 
mm. Diameter of oral sucker, 0.09 mm.; of acetabulum, 0.19 mm.; body serrate, neck very short, 
cirrus pouch behind acetabulum; vitellaria, two and globular; ova, 0.024 and 0.010 mm. in the two 
principal diameters. 
Enchelyopus cimbrius, Four-bearded Rockling. 
FOOD. 
But one specimen examined. This was taken in the trawl net in about 30 fathoms of water off 
Gay Head, August 5, 1899. Shrimps, amphipods, and a few small univalve mollusks in the alimentary 
canal. 
ACANTHOCEPHALA. 
1. Echinorhynchus acus Rudolphi. Intestine. One female; agrees with this species in all essentials. 
See 3, p. 525, etc. 
