48 BULLETIN OF THE 



epimeron and directed backward as well as outward ; the middle portion of 

 the outer surface of each of these epimera is raised and sparsely tuberculous, 

 and there is also a line of small tubercles between the sulcus and the posterior 

 margin on the third, but on the following epimera the transverse sulcus of the 

 dorsum does not extend down the epimera. Most of the tubercles on the side 

 of the sixth somite are arranged in two longitudinal lines, an irregular but 

 prominent one between the two hinges and a less prominent one below. The 

 lateral angles of the sixth somite project downward, outward, and backward in 

 a very large and acute spine outside the base of the uropod. 



The telson is a little longer than the rostrum, slightly expanded toward the 

 base, but the distal two-thirds is narrow, and terminates in a slender spiniform 

 and slightly upturned tip unarmed with spines or setae. On the dorsal side 

 there is a sharp median tooth beneath the projecting carinal tooth of the sixth 

 somite ; either side there is a sharp carina extending from the base nearly to 

 the tip, leaving, except at the base, a smooth and deep groove between them ; 

 the lateral edges are strongly carinate, leaving a smooth groove either side, and 

 a wide and shallow groove the full width of the under surface. 



The lamellae of the uropods are about three fourths as long as the telson : 

 the inner lamella is obtusely lanceolate and nearly four times as long as broad ; 

 the outer is much broader, the tip ovately rounded, and the very prominent 

 lateral tooth about a fourth of the way from the tip to the base. 



The inner lamella of the appendage of the first abdominal somite is very 

 short, about a third as long as the outer, obtuse, and about half as broad as 

 long. 



The sterna of all the abdominal somites are unarmed. 



The eggs are very large, being, in alcohol, about 2.6 and 3 mm. in least and 

 greatest diameter, and are proportionally few in number, there being not far 

 from one hundred carried by the specimen examined. 



The single specimen seen, a female, gives the following measurements : — 



Length from tip of rostrum to tip of telson lll.Omm. 



Length of carapax, including rostrun 46.0 



Length of rostrum 



Breadth of carapax in front, including spines 



" " at cervical suture 



" " at middle, including spines 



Diameter of eye ...... 



Length of antennal scale . . . . 



Breadth of antennal scale . . . 



Length of external maxillipeds 



" first pair of legs .... 



" carpus 



" propodus . . . . 



" dactylus 



18.0 



30.0 



17.0 



21.0 



5.0 



13.1 



7.1 



27.4 



27.2 



2.3, 



6.2 



3.4 



second pair of legs . . . right, 42.0 mm. ; left, 39.0 



