332 INVERTEBRATA OF MASSACHUSETTS. 



v 



Genus PALtEMON, Fabr. 



P. vulga'ris. ^^ Rostrum acute, with eight or nine teeth above, 

 and three or four beneath ; fingers of the larger pair of feet shorter 

 than the hand.'''' Say. 



PalaB^mon vulgaris, Say ; Journ. Acad. Nat. Sc, i. 248. Milne-Edw. ; Hist. JVat. 

 des Crust., ii. 394. 



This animal answers to the Praion of Europe, and is nearly 

 certain to be identical with the Palcemon squilla of Europe. But 

 I have not yet had an opportunity of actual comparison. It is a 

 little larger than the shrimp, and is known by the long, upturned, 

 toothed rostrum. It is less than an inch and a half in length. 



Genus PANDALUS, Leach. 



P. annulico'rnis. Jlntennce marked ivith rings alternately 

 white and red. 



P. annulicornis, Leach ; MalacoL, Sz-c, tab. 40. Latr. ; Lam.; Desm. ; Consid. 

 220, pi. 38, f. 2. Milne-Edw. ; Hist. JVat. des Crust., li. 384. Griffith's 

 Cuv., (Crust.) pi. 17, f. 3. 



A beautiful animal about four inches long, with very long an- 

 tennae, elegantly annulated with white and red, and with a long 

 beak like Palse'mon, from which it is distinguished by having pin- 

 cers on the second pair of feet only, instead of the first two pairs. 

 I have found it only in the stomachs of fishes. 



Genus HIPPOLYTE, Fabr. 



H. aculea'tus. Rostrum recurved., slender, spear-pointed, 

 serrated ; segments of the body terminating each side in a reflexed 

 spine. 



Cancer aculektus, Fabr. ; Fauna Grmnl., 239. 



Alpheus aculeafus, Sabine; Jjpprnd. to Parry's Po?/., 237, tab. 2, f. 0, 10. .Ap- 

 pend, to Beeclieys Voy. 

 Hippolyte aculeatus, Milne-Edw.; Hist. JVat. des Crust., ii. 380. 



About an inch in length, having the internal antennas very short 

 and many -jointed, a compressed, spear-pointed rostrum, and the 



