76 BULLETIN OF THE 



dactyli are wanting on both sides. The ischium, meras, and carpus in the 

 posterior legs are nearly as in the third and fourth pairs, but the merus is a 

 little shorter and narrower, while the terminal portion (PL XL fig. 6) is very 

 nearly as in Miersia Agassizii : the propodus is longer than the merus, nearly 

 three times as long as the carpus, slender, nearly cylindrical, and is armed near 

 the middle with several very long and slender setae, toward the distal end with 

 numerous short serrate setae, and about the base of the dactyl us with numerous 

 long serrate, plumose and simple setae ; the dactylus is very short and stout, 

 scarcely as long as the diameter of the propodus, strongly curved at the tip and 

 armed along the lower side with several spines. 



The abdomen is considerably compressed, and has a sharp, but not very high, 

 dorsal carina on the third, fourth, fifth, and sixth somites, and is prolonged pos- 

 teriorly into a small tooth on the fourth and fifth somites. The outlines of the 

 epimera are very nearly as in Miersia Agassizii, but the posterior margins of 

 the third, fourth, and fifth are perhaps a little fuller and more broadly rounded. 

 The sixth somite is scarcely once and a half as long as the fifth, and about twice 

 as long as high. 



The telson is nearly twice as long as the sixth somite, very slender distally, 

 the dorsum is without aculei but with a broad sulcus within the broadest part 

 of which there is a median longitudinal elevation, and the tip is armed with a 

 pair of lateral and a pair of very slender median spines. 



The outer lamella of the uropod reaches slightly by the tip of the telson, is 

 about three times as long as broad, and with the tip rather broad and extend- 

 ing a little by the tooth in which the outer margin terminates, and within which 

 there is a small spine. The inner lamella is a little shorter than the outer, 

 about four times as long as broad, and lanceolate at tip. 



The outer ramus of the appendage of the first somite is longer than the pro- 

 topod and like that of the succeeding pairs, while the inner is a minute lamella 

 about twice as long as broad. The inner rami of the four succeeding pairs of 

 appendages are each furnished with the usual stylet for attaching together the 

 two appendages of each pair. 



There is but a single specimen in the collection, a female, wanting the left 

 leg of the second pair and the terminal portions of both legs of the third and 

 fourth pairs, from Station 328, N. Lat. 34° 28' 25", W. Long. 75° 22' 50", 

 1632 fathoms. This specimen gives the following measurements : — 



Sex ? 



Length from tip of rostrum to tip of telson 75.0 mm. 



" of carapax including rostrum 30.3 



" of rostrum .......... 4.5 



" of antennal scale ......... 9.5 



Breadth " " 4.5 



Length of sixth somite of abdomen 8.0 



Height " " " 4.0 



Length of telson 15.5 



