MUSEUM OF COMPARATIVE ZOOLOGY. 65 



with three pairs of spines, of which the terminal are small and slender, the 

 next very long, and the anterior short and stout. The lamella; of the iiropods 

 are ahout as long as the telson : the inner is lanceolate and between four and 

 five times as long as broad ; the outer is between three and four times as long 

 as broad, with the tip broad, somewhat obli(|uely rounded, and projecting con- 

 siderably bcvoud the acute tooth in which the outer margin terminates, and 

 just inside the base of which there is a spine much longer than the tooth itself. 



The outer lamella of the appendage of the first somite of the abdomen is a 

 little longer tliau the protopod, about a si.xth as broad as long, and margined 

 with multiarlicuhite plumose seta; as usual, while the inner lamella is a little 

 less than half as long as the outer, expanded externally near the base, where the 

 breadth is equal to about a fourth the length, but tapering and slender distally, 

 and margined with plumose setae like the outer. The inner lamella of the 

 appendage of the second somite is a little longer than the outer lamella of the 

 appendage of the first somite, between six and seven times as long as broad, 

 and bears, a little way from the base, the usual stylet, which is about a fifth as 

 long as the lamella itself. 



The single specimen is from Station 327, N. Lat. 34° 0' 30", W. Lon. 

 76° 10' 30", 178 fathoms, and gives the following measurements : — 



Sex 



Length from tip of rostrum to tip of telson 

 " of carapax including rostrum 

 " of rostrum ..... 



Breadth of carapax .... 



Length of antennal scale .... 



Breadth of " " ... 



Length of riirht chelate leg 



• . . ? 



. 4S.0mm. 



. 24.0 



. 15.2- 



5.2 



. 7.1 



. . . 1.8 



. 9.2 



2.2 



. 1.9 



. 12.3 



. 4.8 



1.2 



. . .4.3 



2.2 



. . . .6.1 



The genus Pandalus, as at present recognized, apparently contains species 

 representing several genera, and this species is prohably not strictly congeneric 

 with P. Montarjui, the type species. The carinated carapax gives the species 

 a very different aspect from the typical Pandali, but the appendages througli- 

 out, excepting the scaphognath of the second maxilla, are very nearly as in 

 P. Mnntagui, and the number and arrangement of the branchiae are the same 

 as in that species, P. propinquus, borealis, leptocerus, and tenuipes, or as indicated 

 in the following formula. 



VOL. X. — NO. 1. 5 



