CKUSTACEA. 5 



THORACOSTRACA. DEC APOD A. 



PINNOTHERIDAE. 



Female in tlie gill-cavity of oysters ; male free-swimming at 

 sm'face. 



Mass. — From Salem southward. 



R. I. 



Conn. 



11. FlNNOTHERES MACULATUS Say. 



Mussel crab. 



Pinnotheres macidati(ni Say, Journ. acad. uat. sei. Fhil. 

 1818, vol. 1, p. 450. ''Inhabits the muricated Pinna of 



OUR COAST." 



Pinnotheres ostreum Smith, Kept. U. S. commr. of fish & 

 fisheries, pt. 1, for 1871-1872 (1878), pi. 1, fig. 2 (S). 



Female between the gills of 3fytilus ediilis and Pecten tenui- 

 costatus; male free-swimming at sm-face. 

 Mass. — From Cape Cod southward. 

 R.I. 

 Conn. 



12. Pinnixa chaetoptekana Stimpson. 



Pinnixa ci/lindrica Stimpson, Ann. lye. nat. hist. N. Y., 



1859, vol. 7, p. 68. Not P. cylindrica (Say). 



Pinnixa chaetopterana Stimpson, Ann. lye. nat. hist. N. Y., 



1860, vol. 7, p. 285. "In the tubes of Chaetopterus perga- 



MENTACEUS, ON MUDDY OR CLAYEY SHORES OF CHARLESTON IIaR- 

 BOR, S. C." 



In tubes of annelids, Chaetopterus pergmnentaceus tin<\. Atiiphi- 

 trite ornata. 



Mass. — Welllleet; Woods Hole ; Xaushon ; Vineyard Sound; 

 Buzzards Ba3\ 



Conn. — Noank ; Stony Creek. 



