BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 



6 7 I 



Libinia dubia Milne Edwards. 



Verrill and Smith, 1873, P- 54 8 > 3 68 J 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 ever, 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 CANCRID^. 



Cancer irroratus Say. Rock Crab. [Chart 115.] 

 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 (i very small), 7523 bis 

 (3), 7524 bis (few), 7525 bis (several small), 

 75 2 9> 753 1 bis (2), 7532 bis (few small), 7533 bis 

 (many small), 7534 bis (several small), 7535 

 (several small), 7535 bis (few small), 7536 (i), 

 7537 (i small male), 7539 bis (i), 7541 (many 

 small), 7541 bis (i), 7542 (i small), 7543 (i 

 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 (i), 7551 (several very small), 7551 bis 

 (few), 7552 (few small), 7553 (few), 7553 bis(i), 

 7554 bis (several), 7555 (many Large), 7556 

 (many large), 7556 bis (several), 7557 (several, 

 very small), 7558 (many), 7560 (i very small), 

 7562 (i large), 7563 (few small), 7564 (many 

 large), 7564 bis (numerous small), 7566 (i 

 16269 Bull. 31, pt 213 9 



Cancer irroratus Continued. 



small), 7570 (2 large, several small), 7571 

 (many large and small), 7573 (few large), 7574 

 (*)> 7576 (few small), 7577 (few small), 7578 

 (several large and small), 7579 (i), 7580 (i), 

 7581 (several large and small), 7582 (several 

 medium), 7583 (i small), 7584 (few large and 

 small), 7585 (i small), 7586 (i small), 7589 (2 

 small), 7591 (few small), 7592 (many large and 

 small), 7593 (few), 7594 (few large), 7595 (few 

 small), 7598 (i very small), 7599 (many large 

 and small), 7600 (i small), 7602 (few small), 

 7603 (i small), 7604 (i small), 7607 (i large), 

 7611, 7616 (i small), 7618, 7622 (several small), 

 7626 (few), 7627 (2 small), 7637 (several small), 

 7639 (few), 7641 (few), 7647 (2), 7648 (several), 

 7 6 5 J (3). 7652 (2 small), 7653 (several), 7656 

 (several), 7659 (several, i 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 (i 

 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 (i), 7722 (i young), 7723 (i 

 young), 7724 (few living), 7725 (3 young), 

 7728 (several), 7729 (2), 7730 (several), 7731 

 (few large and many small), 7732 (2 very small) 

 7733 (i small), 7734 (3 large), 7735 (i small), 

 7736 (i large), 7737 (i large), 7738 (several 

 small), 7739 (2 medium, i small), 7743 (i 

 claw), 7744 (few small), 7746 (i leg), 7749 (i), 

 775 1 ( 2 )- 775 2 ( 2 large, several small), 7753 (2 

 medium), 7755 (several small), 7757 (i me- 

 dium), 7758 (i), 7760 (few), 7761 (common, 

 large and small), 7762 (many large and small), 

 7765 (i medium), 7767 (i), 7770 (i medium), 

 7772 (young), 7773 (i medium), 7775 (i small). 

 Phalarope and Blue Wing stations: 4 (i large), 

 17, 22 (i small), 25 (2 small), 27 (2 small), 28 (i 

 dead), 33 (r dead, several young), 34 (i old, 

 several young), 35 (i small), 37 (i young), 38 



