380 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [36] 



pod ; the carpus is scarcely half as long as the merus, subcyliudrical, 

 and slightly enlarged distally ; the chela is about twice as long as the 

 carpus, very slightly swollen proximally, the digits nearly a third ot 

 the whole length, strongly curved at the tips, and the propodal one con- 

 siderably stouter than the dactylus. The second perseopods are very 

 slender and reach to the tips of the second gnathopods : the ischium 

 and merus are strongly compressed, and the latter is longer than in the 

 first pair, and reaches to the distal extremity of the proximal segment 

 of the endopod of the second gnathopods ; the carpus is slender, cylin- 

 drical, and about half as long as the merus ; the chela is slightly longer 

 than the carpus, scarcely as long as in the first pair, cylindrical, scarcely 

 as stout as the carpus, not at all swollen, and with very slender and 

 slightly compressed digits about one-fifth the entire length. The third 

 and fourth pairs of perseopods are nearly alike : the ischia and meri are 

 compressed and nearly as in the second pair, but a little longer; the 

 carpi are a little shorter and broader than in the second j)air ; the pro- 

 podi are about a third of the entire length, very slender, slightly com- 

 pressed, flattened or grooved on all the four sides and with the angles 

 acutely cariuated ; the dactjii are less than a third as long as the pro- 

 podi, very slender, very slightly curved, regularly tapered, and angu- 

 lated like the propodi. 



The outer ramus in the first pair of i^leopods is long and slender like 

 that in the succeeding pairs, but the inner ramus is developed into a 

 broad oval lamella as in Acanthejyhyra Agassizii, except that the stylet 

 at the inner edge is very short, scarcely projecting beyond the tip of 

 the lamella. 



The number and arrangement of the branchiae and epipods is the same 

 as in Acanthephyra Agassizii and eximea. In the original description of 

 the genus Meningodora I stated that there ^yas apparently but one 

 branchia at the base of the second gnathopod, as I was unable to find 

 a second in the badly-preserved specimen first examined, but in the 

 specimen here described there are two branchiae as in the allied genera. 



Measurements in millimeters. 



Station 2051 



Sex ^ 



Length from tip of rostrum to tip of telson 65 



Length of carapax, including rostrum 27 



Length of rostrum 4 



Hight of carapax 13 



Length of eye-stalk and eye 4. 1 



Greatest diameter of eye 1. 3 



Length of antenual scale 9. 6 



Breadth of antennal scale 4.0 



Length of second gnathopod 23, 



Length of first perseopod 23. 



Length of chela 6. 4 



Breadth of chela 1.3 



Length of dactylus 2.0 



