ENTOZOA OF MARINE FISHES. 
535 
dally the median and anterior ones, which are broad, stout, and strongly 
recurved, with broad basal supports as long, or even longer, than the 
hook. Basal hooks more slender than median and anterior hooks, not 
so sharply recurved, and with shorter or, in some, with bifurcating basal 
supports (fig. 76). Length of longest hooks about 0.1 16 mm . Sheath twice 
the length of proboscis 5 lemnisci slender, not so long as the sheath. 
Measurements. Millimetres. 
Entire length 14.00 
. Breadth at widest part 1. OH 
Length of proboscis (estimated) 1.20 
Length of sheath 2. 40 
The anterior part of the body as far back as the base of the pro- 
boscis sheath was thickly beset with fiat, appressed, scale-like spines. 
The thin membranous investment which bore these spines covered the 
entire body. It was partly removed during the examination of the 
specimen. From the manner in which it separated from the cuticle of 
the specimen I am inclined to interpret it as a character which is inci- 
dental to the encysted condition of the worm, and not to be regarded 
as an adult characteristic. The specimen is immature, but appears to 
be a female. 
Habitat: Serranus atrarius , peritoneum, Wood’s Holl, Massachusetts, 
September 3, 1885. 
Echinorhynchus sagittifer Linton. 
[Plate vn, fig. 80.] 
U. S. F. C. Rept. 1886, pages 493-496, plate vi, figs. 1 and 2 = 
The following captures of this parasite have been made since the 
report cited above was submitted. 
Date. 
No. of 
Echino- 
rh.ynchi. 
Name of host. 
July 30, 1886 
1 
Cynoscion regale. 
Aug. 10, 1887 
2 
Paralichthys dentatus. 
Sept. 2, 1887 
7 
Do. 
July 6,1889 
25 
Do. 
July 10, 1889 
15 
Do. 
July 9.1S89 
1 
Pomatomus saltatrix. 
July 10,1889 
1 
Do. 
July 15, 1889 
4 
Do. 
July 10,1889 
1 
Cynoscion regale. 
July 26, 1889 
1 
Pomatomus saltatrix. 
July 30, 1889 
1 
Serranus atrarius. 
Aug. 19, 1889 
2 
Cj noscion regale. 
These specimens were all found in the body cavities of their hosts, 
commonly in the mesentery and always inclosed in a thin, transparent 
membranous envelope. In some of the smaller specimens the rows of 
the spines on the body are poorly developed, but in all the larger spec- 
imens there are' about twenty transverse rows of sagittate spines. 
