BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 
671 
Libinia dubia Milne Edwards. 
Verrill and Smith, 1873, p. 548, 368; M. J. Rath- 
bun, 1892, p. 237; 1905, p. 12. 
Woods Hole (abundant in 1882); Buzzards Bay, 
in 7 fathoms; Mattapoisett Harbor. — Rathbun. 
Locally, at least, this crab is nearly or quite 
restricted to very shallow waters, and is sel- 
dom, if ev£r, taken by larger vessels with the 
dredge. Libinias of all sizes were collected 
from 17 different stations in Buzzards Bay and 
Vineyard Sound during the summer of 1907, 
and from 16 stations in 1909, but not one speci- 
men proved to be L. dubia (unless certain very 
small ones were referable to that species) 
though this was especially sought for. During 
the regular Survey dredging, the species was 
recorded from Fish Hawk stations 7678, 7725, 
and 7738, but these specimens, it is believed, 
were all immature, and the determinations are 
very questionable. Libinia dubia is, however, 
common in shallow water at North Fal- 
mouth, having been taken there by Mr. 
Gray and by our own collectors. One speci- 
men was taken by Dr. Cole near Dumpling 
Rock Light, another by Mr. R. I. Hall in the 
Eel Pond at Woods Hole. 
Family Cancrimj. 
Cancer irroratus Say. Rock Crab. [Chart x 15.] 
Verrill and Smith, 1873, p. 546, 312, etc.; S. I. 
Smith, 1879, p. 38; R. Rathbun, 1884, p. 766; 
M. J. Rathbun, 1905, p. 9. 
Abundant and generally distributed throughout 
Vineyard Sound, and to a lesser extent in Buz- 
zards Bay; several stations at Crab Ledge; 
dredged in 2 to 19 fathoms, on every sort of 
bottom.— Survey. Common along shore, un- 
der rocks, or buried in the sand. 
Fish Hawk stations: 7522 (1 very small), 7523 bis 
(3), 7524 bis (few), 7525 bis (several small), 
7S 2 9. 7 S3 1 bis (2), 7S3 2 bis (few small), 7533 bis 
(many small), 7534 bis (several small), 7535 
(several small), 7535 bis (few small), 7536 (1), 
7537 ( x small male), 7539 bis (1), 7541 (many 
small), 7541 bis (1), 7542 (1 small), 7543 (1 
small), 7543 bis (few), 7544 (few small), 7545 
(few small), 7546 (few small), 7546 bis (2), 7547 
bis (several small), 7549 (few small), 7550 (2), 
7550 bis (1), 7551 (several very small), 7551 bis 
(few), 7552 (few small), 7553 (few), 7553 bis (1), 
7554 bis (several), 7555 (many large), 7556 
(many large), 7556 bis (several), 7557 (several, 
very small), 7558 (many), 7560 (1 very small), 
7562 (1 large), 7563 (few small), 7564 (many 
large), 7564 bis (numerous small), 7566 (x 
16269° — Bull. 31, pt 2 — 13 9 
Cancer irroratus — Continued. 
small), 7570 (2 large, several small), 7571 
(many large and small), 7573 (few large), 7574 
(1), 7576 (few small), 7577 (few small), 7578 
(several large and small), 7579 (1), 7580 (1), 
7581 (several large and small), 7582 (several 
medium), 7583 (1 small), 7584 (few large and 
small), 7585 (1 small), 7586 (1 small), 7589 (2 
small), 7591 (few small), 7592 (many large and 
small), 7593 (few), 7594 (few large), 7595 (few 
small), 7598 (1 very small), 7599 (many large 
and small), 7600 (1 small), 7602 (few small), 
7603 (1 small), 7604 (1 small), 7607 (1 large), 
7611, 7616 (1 small), 7618, 7622 (several small), 
7626 (few), 7627 (2 small), 7637 (several small), 
7639 (few), 7641 (few), 7647 (2), 7648 (several), 
7651 (3). 7 6 52 (2 small), 7653 (several), 7656 
(several), 7659 (several, 1 with eggs), 7660 
(few), 7661 (several), 7663 (several), 7664 (3), 
7667 (2), 7671 (few large, many small), 7672 
(few, mostly small), 7673 (several, especially 
small), 7674 (several, with eggs), 7675 (several), 
7674 (4), 7677 (about 6), 7678 (many), 7679 
(many), 7680 (many large and small), 7681 
(many large) 7682 (many large and very small), 
7685 (2 young), 7686 (several large and small, 
7687 (several medium), 7688 (4:1 small), 7695 (1 
very small), 7696, 7697 (several), 7698 (several) 
7699 (many, adult and young), 7700 (several, 
large and small), 7701 (many large and small), 
7702 (many large and small), 7703 (many large 
and small), 7704 (few), 7706 (many large and 
small), 7707 (many large and small), 7708 
(many large and small), 7709 (many large and 
small), 7710 (few small), 7717 (few large and 
small), 7718 (few large and small; many me- 
dium), 7719 (many), 7720 (very many large 
and small), 7721 (1), 7722 (1 young), 7723 (1 
young), 7724 (few living), 7725 (3 young), 
7728 (several), 7729 (2), 7730 (several), 7731 
(few large and many small), 7732 (2 very small) 
7733 C 1 small), 7734 (3 large), 7735 (1 small), 
7736 (1 large), 7737 (1 large), 7738 (several 
small), 7739 (2 medium, 1 small), 7743 (1 
claw), 7744 (few small), 7746 (1 leg), 7749 (1), 
7751 (2), 7752 (2 large, several small), 7753 (2 
medium), 7755 (several small), 7757 (1 me- 
dium), 7758 (1), 7760 (few), 7761 (common, 
large and small), 7762 (many large and small), 
7765 (1 medium), 7767 (1), 7770 (1 medium), 
7772 (young), 7773 (1 medium), 7775 (1 small). 
Phalarope and Blue Wing stations: 4 (1 large), 
17, 22 (1 small), 25 (2 small), 27 (2 small), 28 (1 
dead), 33 (1 dead, several young), 34 (1 old, 
several young), 35 (1 small), 37 (1 young), 38 
