BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 
561 
f Dipurella clavata Hargitt.® 
Hargitt, 1902, p. 19 (sp. nov.); Hargitt, 1904, p. 
31; Mayer, 1910, p. 76 ( Slabberia strangulata , 
immature). 
A single specimen taken in Great Harbor, 
August 16, 1902. 
Eciopleura ochracea Agassiz. 
L. Agassiz, 1862, p. 343; A. Agassiz, 1865, p. 
191 ; Verrill and Smith, 1873, p. 735, 455; 
Fewkes, 1882, p. 295; Nutting, 1901, p. 373; 
Hargitt, 1902a, p. 554; Hargitt, 1904, p. 32; 
Mayef, 1910, p. 69 ( Eciopleura dumortieri). 
Buzzards Bay, at Naushon Island. — A. Agassiz. 
Newport; Woods Hole. — Nutting. Woods 
Hole and vicinity, “taken mostly in the 
evening tow.” — Hargitt. A common species 
locally, occurring from June to September. 
Eciopleura prolifica Hargitt. 
Hargitt, 1908, p. 106 (sp. nov.). 
Described by Hargitt from a specimen found 
upon a small spider crab, dredged off Gay 
Head, July 15, 1907. Taken several times 
during summer of 1908, and in considerable 
numbers, both in Vineyard Sound and on the 
piles of the Bureau of Fisheries pier at Woods 
Hole. 
Hydrickthys mirus Fewkes. 
Fewkes, 1888, p. 224 (sp. nov.); Nutting, 1901, 
p. 374; Hargitt, 1904, p. 32; Mayer, 1910, p. 
67 - 
A large cluster found growing upon the side of a 
pilot-fish ( Seriola zonata) taken at Newport in 
August, 1887; not observed at any other 
time. Fewkes thought it likely that this 
hydroid was a parasite. Thousands of me- 
dusas were liberated while the animals were 
under observation. 
Family Pbnnariid^. 
Pennaria tiarella McCrady. [Chart 14.] 
A. Agassiz, 1865, p. 187; Verrill and Smith, 
1873, p. 735 . 3 2 7 ; Bumpus, 1898b, p. 858; 
Hargitt, 1900, p. 387-406; Nutting, 1901, p. 
337 . 374 ; Hargitt, 1901, p. 311; 1902a, p. 554; 
1904, p. 32; Mayer, 1910, p. 25. 
Dredged by the survey throughout the length 
of Vineyard Sound, at depths of 1 to 15 fathoms 
on non-muddy bottoms; recorded but twice 
in the Buzzards Bay dredgings, though 
probably of more general occurrence as a 
Pennaria tiarella— 1 Continued. 
littoral species. Pennaria has a wide range 
of habitat. It is perhaps most readily col- 
lected from piles, but is found upon all sorts 
of objects whether fixed or free. In mid- 
summer it occurs in abundance on floating 
eel grass. Dr. Hargitt believes that the 
attachment to eel grass represents a later 
seasonal phase in the life of Pennaria , and 
that it is to be regarded as an adaptation for 
distribution. The medusae are especially 
abundant in the latter part of the summer. 
Fish Hawk stations: 7521 bis (? many), 7523 bis 
(? few colonies), 7524 (many)f, 7525 (abun- 
dant, large bunches), 7525 bis (? many), 
7526 (many), 7531 bis*, 7537, 7540 (dead), 
7542 (numerous), 7553 bis*, 7557, 7572 (many), 
7582, 7589 (small tuft), 7S94 (small piece, 
dead), 7676 (sexually mature)*, 7681*, 7688*, 
7703*, 7709*, 7717*, 7718*, 7721*, 7725*, 7726*, 
773 °*. 7733 *. 774 **. 7742 *. 7743 *. 7745 *. 
7746*, 7749*. 775 1 *. 775 8 *. 7759*. 7760*, 7761*, 
7763*, 7764*, 7779*. Supplementary stations 
( I 9 ° 9 ) : 7 6 53 . 7 6 59 - 
Phalarope and Blue Wing stations: 1*, 30*, 44*, 
51*, 63*, 71*, 73*, hi*, 121*. 
Eupkysa virgulata Agassiz. 
Nutting, 1901, p. 370; Hargitt, 1904, p. 33; 
Mayer, 1910, p. 35 ( Steensirupia virgulata 
“=(}) S. aurata Forbes”). 
Woods Hole. — Hargitt. 
Family Hybocodoniduj. 
Hybocodon prolifer Agassiz. 
Verrill and Smith, 1873, p. 736, 328; Nutting, 
1901, p. 341, 370; Hargitt, 1902a, p. 552; Har- 
gitt, 1904, p. 33; Mayer, 1910, p. 38. 
Vineyard Sound. — Verrill. Woods Hole (medu- 
sae only). — Nutting. The medusae of this 
species have been taken locally by Mr. 
Edwards during nearly every month of the 
year, but they appear from his records to be 
most abundant in April. Dr. Mayer found 
them in abundance in Woods Hole Harbor on 
March 4 (1907), while Dr. Hargitt records their 
capture off Crab Ledge in July and August. 
So far as we know the polyp phase has not 
been definitely recorded for local waters, but 
the constant occurrence of the medusa war- 
rants the belief that the hydroid likewise 
occurs. 
a Dr. Hargitt now regards this as probably the medusa of Corynitis linvillei Hargitt. 
