1 2(3 Notes on North American Crustacea^ 



Mippolytc !«ipiiia. 



Cancer spimis Sowerby, British Miscellany, xxi. 



Uijypolyte spirvm Whiia^ British Museum Cat., Crust. (1847), p. 76. Bell, 



British Crustacea, p. 284. 



Hipj)olyte Sotcerbei Leach. Kroyer, Monog. Fremst. Hippol. , 90 ; pi. ii, fig. 

 45-54. 



This species is very beautifully colored in life, being gene- 

 rally speckled or mottled with crimson, or bluish ; the base of 

 the antennulae is usually brownish, and the scale of the antenn[\3 

 blue. 



It is common on rocky bottoms, among algse in the laminarian 

 zone, on the coasts of Maine and Massachusetts. I have several 

 specimens from Grand Manan, where it occurs at low water 

 mark. 



Sowerby, by the name he gave to this species, doubtless had 

 reference to a spine, or the backbone ; in Latin sjnna, not 

 spinus. Spinus is not an adjective, and means only the sloe- 

 tree, which could scarcely have been intended. 1 have, there- 

 fore, taken the liberty to modify the name, and all the more wil- 

 lingly because Tlippolyte is feminine. 



Hippolyte Fabricii. 



Hippolyte Fabricii Kroyer, Monog. Fremst. Hippol. , p. 69 ; pi. i, f. 12-20. 

 This species is common in Massachusetts Bay, in which I 

 have often obtained specimens by dredging. 



llipi^olyte Gaiimardli. 



Hippolyte Oaimardii H. Milne-Edwards, Hist. Nat. des Crust., II, 378. 

 Kroyer, Monog. Fremst. Hippol., p. 74; pi. i, f. 21-29. 



In our specimens the back of the abdomen at the third seg- 

 ment is smo(^thly rounded ; but in Milne-Edwards' description 

 this segment is said to be " moins dentc." Our specimens, 

 however, agree perfectly with Kroyer's description and iigures. 



This species occurred to me on a sandy bottom, covered with 

 dead Zostera^ in three fathoms, in Boston harbor, and I have 

 found it in other parts of Massachusetts Bay. 



