BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 
591 
Micrura ajjinis (Girard). 
Verrill, 1879, p. 186 (not listed for this region); 
1892, p. 428. 
South of Cape Cod and off Nantucket and Mar- 
thas Vineyard; 12 to 50 fathoms. — Verrill. 
Marthas Vineyard and northward. — Coe. 
Cerebrcitulus lactcus (Leidy). 
Verrill and Smith, 1873, p. 630, 324, 349, 350 
( Meckelia lactea and M. ingens)', Verrill, 1892, 
P- 433; C° e - i8 99- 
Buzzards Bay and Vineyard Sound; “common, 
burrowing both in sand and mud at and above 
low-water mark and in shallow water down to 
several fathoms in depth.” — Verrill. Nau- 
shon, Hadley Harbor, Great and Little Harbors 
(Woods Hole), Penzance (Buzzards Bay side), 
Falmouth, Quisset. — Coe. 
Fish Hawk station *: 7556 (several dead pieces), 
7640 ( ? posterior portion only), 7647 ( ? midpor- 
tion only), 7652 (? posterior end only), 7659. 
Eggs ripe at New Haven during March, April, 
and May; in Maine this species breeds in July; 
eggs can be artificially fertilized and embryos 
easily reared to pilidium. In recent years 
the eggs of this form have been extensively 
used in experimental embryology. 
Cerebratulus marginatus Renier. 
Verrill, 1892, p. 438 {Cerebratulus fuscus). 
“ South of Cape Cod it occurs in 15 to 45 fathoms 
on bottoms of sand and mud in the cold areas 
swept by the arctic current, as off Gay Head in 
19 fathoms.” — Verrill. Gay Head, under 
stones, between tides. — Coe. Buzzards Bay, 
at Fish Hawk station 7638; 9 fathoms, mud*. 
Cerebratulus luridus Verrill. 
Verrill and Smith, 1873, p. 630, 502, 508 {Meckelia 
lurida, sp. nov.); Verrill, 1892, p. 440; Coe, 
1899. 
Off Gay Head, 19 fathoms, soft mud; off Buz- 
zards Bay, 25 fathoms. — Verrill. Lower half 
of Buzzards Bay, in 6 to 13 fathoms, on muddy 
bottoms. — Survey. 
Fish Hawk stations: 7638*, 7642*0, 7643*0, 
7647*, 7654*, 7655*, 7658*, 7661 (?), 7662 (?), 
7669 (?). 
Apparently ripe eggs in Cape Cod Bay in 
August. — Verrill, cited by Coe. 
0 Uncertain whether presen ; 
16269° — Bull. 31, pt 2 — 13 4 
Family CarcinonemERTid^E. 
Carcinofieniertes carcinophila (Ivolliker). 
Coe, 1902, p. 441. 
Nobska Point, Katama Bay, Menemsha Bight. 
“ Parasitic on the gills of various species of crabs 
when young, migrating to the egg masses of 
the crab at the approach of sexual maturity.” 
Locally, reported only from the “lady crab” 
{Ovalipes ocellatus). In the case of a large 
number of crabs of this species examined by 
Dr. Coe during July and August of various 
years the parasites were found on the gills of 
about 10 per cent of the female crabs, but 
none were found on the males. 
Family Amphiporimj. 
Zygonemertes virescens (Verrill). 
Verrill, 1879, p. 183 {Amphiporus virescens, sp. 
nov.); 1892, p. 400 {Amphiporus virescens ); 
Coe, 1899 {Amphiporus virescens). 
Woods Hole, Newport; “common in shallow 
water among hydroids and ascidians, and on 
the piles of wharves, between tides.” — Verrill. 
Piles of United States Bureau of Fisheries pier, 
Woods Hole steamboat landing, Little Har- 
bor. — Coe. 
Eggs mature at Woods Hole in July and August. — 
Coe. 
Amphiporus ochraceus Verrill. 
Verrill and Smith, 1873, p. 630, 325 {Cosmoce- 
phala ochracea, sp. nov.); Verrill, 1892, p. 396; 
Coe, 1899. 
Woods Hole, Vineyard Sound; common between 
tides, in tide pools, and under stones, creeping 
among algae, hydroids, etc., or in dead tubes of 
serpula; on piles of wharves; likewise dredged 
in 2 to 20 fathoms, on stony or shelly bottoms. — 
Verrill. Woods Hole Harbor, at railroad 
wharf and Juniper Point, Nobska Point, Pen- 
zance (Bay shore), Eel Pond; common among 
eelgrass. — Coe. Buzzards Bay, shore of Nash- 
awena, at Phalarope station 78, in 5 to 6 fathoms, 
sand and mud*. 
Dr. Coe reports that in the vicinity of New 
Haven the eggs are laid during May and June ; 
in one case as early as January. 
one or both of these stations. 
