BIOLOGICAL, SURVEY OB WOODS HOLE AND VICINITY. 
733 
Amaroucium pellucidum form constellation ( Verrill). 
[Chart 196.] 
Verrill, 1871a, p. 359 ( Amouroucium constellation , 
sp. nov.); Verrill, 1872 ( Amouroucium constel- 
latum); Verrill and Smith, 1873, p. 704, 388, 
etc. ( Amaroecium constellation ); Bumpus, 1898b 
{Amaroecium constellation ); Van Name, 1910, 
p. 406. 
Abundant and generally distributed in the east- 
ern half of Vineyard Sound ; elsewhere in the 
Sound, and in Buzzards Bay, it is almost 
wholly confined to the inshore stations; 
dredged in 1 to 15 fathoms, on bottoms of sand, 
gravel, and stones. — Survey. Likewise com- 
mon on piles in Woods Hole Harbor, Vineyard 
Haven f and Edgartown.f 
Fish Hawk stations: 7521 bis (many clumps), 
7522! (several masses) 0 , 7522 bis (several 
clumps), 7523 (several masses), 7523 bis (few 
masses), 7524 bis (1 mass), 7526 (1 small piece), 
7527 (abundant), 7528 (many), 7530 (several 
masses), 7531 (3 small), 7532 (few), 7532 bis 
(1), 75 36 bis (1 small piece), 7537, 7538 (several 
pieces), 7539 (several masses), 7540 (few 
masses), 7544 (1 clump), 7547 (few), 7549 bis 
(1 small colony), 7553 bis (few colonies), 7557 
(few small pieces)t ffi , 7588 (2 pieces), 7595 (few 
pieces), 76x9 (2 masses), 7645 (1 small colony), 
7737 (1 large clump), 7738 (several colonies), 
7739 (little), 7740 (little), 7746 (little), 7748 
(little)f, 7749 (much), 7750 (much), 7751 
(much), 7752 (common), 7754 (much), 7758 
(little), 7759 (little), 7760 (little), 7761 (little), 
7763 (much)f , 7764 (little), 7765 (little), 7766 
(very little), 7767 (little)f, 7768 (much), 7769 
(little), 7770 (1 small piece), 7772 (very little), 
7773 (little), 7775 (little), 7777 (little), 7781 
(little). 
Phalarope and Blue Wing stations: 1 (few pieces) 
2 (few), 3 (few), 9 (1 colony), 10 (2 colonies), 11 
(common), 12 (several pieces), 14 (1 colony), 
22 (few), 24 (1 colony), 25 (few), 30 (1 mass), 32 
(few pieces)?, 34 (few), 44 (scarce), 45 (many 
small), 46 (few small masses), 51 (few), 56 (few), 
57 (few), 58 (few), 62 (several), 63 (many), in 
(young colony), 112, 113 (small colony), 118 
(few colonies), 12 1 (several), 130 (few), 13 1 
(few), 135, 136 (few). Supplementary station 
(1909): 83 (? 1 mass). 
Found frequently to contain large ova and em- 
bryos in July. — F. W. Bancroft, cited by 
Bumpus. 
Amaroucium glabrum Verrill. 
Van Name, 1910, p. 410. 
Vineyard Sound, near Cuttyhunk, at Fish Hawk 
station 7689! (9 fathoms, sand, and stones). 
Certain other specimens were referred by 
Prof. Ritter to this species, but are assigned to 
A. pellucidum constellation by Dr. Van Name. 
We have adopted the identifications of the 
latter authority in the case of the composite 
ascidians. 
Amaroucium stellatum Verrill. [Chart 197.] 
Verrill, 1871, p. 291 ( Amouroucium stellatum, 
sp. nov.); Verrill, 1872; Verrill and Smith, 
1873, p. 704, 402, etc. ( Amaroecium stellatum)', 
Bumpus, 1898b ( Amaroecium stellatum)', Van 
Name, 1910, p. 416. 
Abundant and generally distributed throughout 
most of Vineyard Sound, though apparently 
wanting in the deeper parts at its western end; 
Crab Ledge, at several stations; not recorded 
from Buzzards Bay; dredged in 4^ to 17 fath- 
oms, on bottoms of sand, gravel, and stones. — 
Survey. This species does not appear to occur 
in such shallow waters as the preceding, though 
the two are frequently taken together at mod- 
erate depths. They both form extensive col- 
onies, which commonly are readily distin- 
guishable from one another by their general 
appearance. A. stellatum has been collected 
by V. N. Edwards in shallow water at Sheep 
Pen Cove, though such specimens had perhaps 
drifted in from deeper waters. It is frequent 
in drifted material on Nobska Beach. Living 
specimens have been taken in January by 
both Mr. Edwards and Mr. Gray. 
Fish Hawk stations: 7523 (several masses), 7525 
bis (many masses), 7526 (few small pieces), 
7527 (abundant), 7528 (many), 7530 (several 
masses), 7531 bisf, 7532 (few), 7532 bis (many), 
7535 ( fe w), 7537 (several pieces), 7538 (many 
masses), 7539 (few masses), 7541 (few masses), 
7541 bis (few), 7542 (many long and rope-like 
masses), 7542 bis (several living colonies), 7543 
(2 pieces), 7543 bis (several masses), 7544 (sev- 
eral pieces), 7545 (few small pieces), 7547 (few 
pieces), 7548 (many pieces), 7550 bis (?), 7551 
(1 piece)f, 7552 (few pieces), 7553 (few pieces), 
7554 (several pieces), 7554 bis (numerous col- 
onies), 7556 (1 ropy mass), 7558 (many masses), 
7560 (several pieces), 7561 (few masses), 7579 
(3 large pieces), 7580 (1 mass), 7594 (1 large 
piece), 7603 (few small)*, 7605, 7606 (few), 
Dr. Van 
In the present report we have consistently 
0 Specimens from stations 7522 and 7557 were identified as A . glabrum by Prof. Ritter, in the first case doubtfully. 
Name, after examining the same specimens, dissents from these determinations, 
followed Dr. Van Name’s identifications for all the composite ascidians submitted to him. 
