BIOLOGICAL, SURVEY OF WOODS HOLE AND VICINITY. 
721 
Skenea planorbis Fabricius. 
Gould, 1870, p. 296 (not listed for this region); 
Verrill and Smith, 1873, p. 655, 383; Verrill, 
1878, p, 211; 1882c, p. 550; Dali, 1889, p. 150. 
Cuttyhunk Island. — Verrill. Listed for rocky 
shores; also for piles, etc. 
Family AssiminEid.®. 
Assiminea modesta (Lea). 
Verrill, 1884a, p. 253. 
Newport. 
Assiminea gray ana Leach. 
Verrill, 1882c, p. 525. 
Among decaying seaweeds, at high-water mark, 
between tides, at Newport (1880). 
Family TruncateijjD/E. 
Truncatella truncaiula (Drapamaud). 
Verrill, 1882c, p. 525. 
Considerable numbers taken on decaying sea- 
weeds, at high-water mark, among docks at 
Newport, 1880. 
Family Calyptr/Eid/E. 
Crucibulum striatum (Say). [Chart 182.] 
Gould, 1870, p. 275 (not listed for this region); 
Verrill and Smith, 1873, p. 651, 399, etc.; 
Dali, 1889, p. 152. 
“Vineyard Sound and Buzzards Bay, 3 to 12 
fathoms, not uncommon.” — Verrill. Western 
end of Vineyard Sound, beyond Quicks Hole, 
fairly frequent; Bay side of Sow and Pigs Reef, 
1 station. — Survey. 
Fish Hawk stations: 7382 (1 shell), 7585 (2 shells, 
1 living), 7391 (6 shells), 7592 (1 shell), 7598 
(many living; some on Venericardia shells), 
7664 (few living on Astarte ), 7679 (1 shell), 7680 
(1 living), 7682 (1 living and shell), 7688 (1 
living), 7698 (several living), 7699 (1 living), 
7700 (2 shells), 7702 (1 living), 7706 (2 living 
and shells), 7708 (1 small shell), 7709 (1 shell), 
7719 (1 small shell). 
Phalarope station 59 (1 shell). 
Crepidula fornicata Lamarck. Boat shell. [Chart 
183.] 
Gould, 1870, p.271; Verrill and Smith, 1873, p. 
649, 417, etc.; Dali, 1889, p. 152; Conklin, 
1897, p. 14; Mead, 1898, p. 703; Bumpus, 
1898b, p. 857; Sumner, 1910, fig. 22. 
Abundant and of general distribution through- 
out the entire region; living specimens 
dredged rather more frequently in the Sound 
than in the Bay, being taken in 2 to 19 fathoms, 
on very varied bottoms. Extensive beds, 
composed very largely of shells of this species, 
Crepidula fornicata — Continued. 
occur in Vineyard Sound. This mollusk is 
perhaps most frequently encountered on the 
shells of hermit crabs. It is likewise usually 
present on the carapace of Limulus; sometimes 
on rocks or piles, or merely clinging to others 
of the sdme species. In the last case a consid- 
erable number may adhere in series, forming a 
sort of chain. 
Fish Hawk stations: 7521 (few ’shells), 7521 bis 
(many shells), 7523 (few shells), 7524 (many 
large), 7524 bis (many large living), 7525 (1 
shell), 7525bis (few shells), 7526 (several), 7527 
(few small), 7528 (few), 7530 (many with eggs), 
7530 bis (many shells), 7531 (many shells), 
7532 (few small shells), 753 3 (several shells), 
7535 ( few shells), 7536 (1 shell), 7536 bis (few 
shells), 7537 (1 shell), 7338 (few shells), 7540 
(few shells), 7541 (few shells), 7542 bis (few 
shells), 7543 (few shells), 7544 (1 shell), 7343 
bis (few fragments), 7546 (few shells), 7546 bis 
(many shells), 7547 bis (many shells), 7548 (few 
shells), 7549 bis (few living, on Polynices 
heros), 7551 (living and shells), 7551 bis (few 
living and shells), 7552 (many living and 
shells), 7552 bis (few shells), 7553 bis (few 
shells), 7554 (many small living), 7554 bis (few 
shells), 7555 (few on mussels), 7556 (many on 
shells), 7556 bis (many shells), 7557 (few on 
shells of Polynices heros and P. duplicata) , 7558 
(1 shell) 7559 (many living), 7560 (several 
shells), 7561 (few shells), 7562 (few shells), 
7562 bis (few shells), 7363 (many), 7563 bis 
(few shells), 7564 (few), 7564 bis (living and 
shells), 7565 (few shells), 7565 bis (1 shell), 
7366 (many shells), 7567 (many shells), 7568 
(many shells), 7569 (few shells), 7369 bis (few 
shells and fragments), 7571 (few shells), 7572 
(few shells), 7574 (few shells), 7575 (few shells), 
7576 (many living and shells), 7377 (many 
shells, few living), 7378 (few living, many 
shells), 7579 (few), 7580 (several shells), 7581 
(few living), 7582 (several), 7583 (few shells), 
7584 (few), 7583 (several shells), 7587 (many 
shells), 7588 (many shells), 7591 (few shells), 
7592 (few living and shells), 7593 (few shells), 
7595 (many shells), 7596 (several shells), 7597 
(many shells, few living), 7598 (many shells), 
7599 (few shells), 7602 (few shells), 7610 (sev- 
eral shells), 7613 (several fragments), 7614 (few 
shells), 7615 (several shells), 7616 (few shells), 
7617 (many living and shells), 7619 (few shells) 
7620 (many shells), 7621 (very many shells), 
7623 (few shells), 7624 (very many shells), 7625 
(very many shells), 7626 (very many shells) 
