128 Notes on North American Crustacea^ 



Pandalus borealls. 



Pandalus bwealis Kroyer, Tidsskrift, II, 354 ; Voy. en Skandinavie et La- 

 ponie, Zool., Crust., pi. vi, fig. 2. 



In this species the feet of the posterior pair reach only to the 

 extremity of the scales of the antennae. The caudal segment 

 has nine pairs of dorsal aculei, which is another mark by which 

 this species may be distinguished from P. annulicornis. It 

 reaches a large size. 



Found in Massachusetts Bay. 



PandaSus Criiriieyi, nov. sp. 



A large species, of the same size as Jr*. borealis, etc. Surface 

 of tlie carapax marked with shallow pits in clusters ; not pubescent. 

 Rostrum more than one-half longer than the carapax, and unarmed 

 above, except near the base, where the crest has eight or nine teeth, 

 four of which are on the carapax : these teeth are small and rather 

 distant. Below, the rostrum is armed with nine teeth, the two t^eth 

 next the base being rather close together, large, and hook-shaped, but 

 not broad. The feet of the third pair are rather short, not reaching 

 the extremity of the rostrum ; they terminate in well-formed sub- 

 cheUform hands. • 



Found at Monterey, Cal., by A. S. Taylor, Esq. It is named 

 P. Gurneyi at the request of its discoverer. 



Palaenionetes. 



This genus resembles Palaeinon and Leander closely in all 

 its characters, except that the mandibles are not palpigerous. 

 From Anchistia it differs in its general form and habit, which 

 are exactly those oi Palae7non, and in its antennulse, which are 

 provided M'ith three flagella. It agrees with Leander in the 

 spines of the carapax. The species are for the most part in- 

 habitants of fresh or brackish water. 



The genus was described by me in manuscript about twelve 

 years ago under the name Palaemonopsis, but this name has 



