332 INVERTEBRATA OF MASSACHUSETTS. 



Genus PALiEMON, Fabr. 



P. VULGARIS. '■'■Rostrum acute, with eight ornine teeth above, 

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

 than the hand.'''' Say. 



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

 des Crust., ii. 394. 



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

 certain to be identical with the Paldmon 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. Jintennce. marked with rings alternately 

 ivhite and red. 



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

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

 Cdv., (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 acule;\tus, Fabr. ; Fauna Grmil., 239. 



Alpheus aculeatus, Sabine; Append, to Parry s J'oy.,2'^7, tab. 2, f. 9, 10. Ap- 

 pend, to Beecheifs Voy. 

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



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

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



