364 



bulletin: museum of comparative zoology. 



Fig. 6. — Nerocila excisn 

 First five segments of abdo- 

 men. 8. X 



length to the first pair. The posterior margin of the head is trilobate, 

 the median lobe being the largest. 



The first four thoracic segments are about equal in length, but in- 

 crease gradually in width. The epimera of the second, third, and 

 fourth segments extend the entire length of the lateral margin. The 



fifth, sixth, and seventh segments are much 

 longer than the four anterior segments, 

 each being about one and a half times 

 longer than any of those preceding. Their 

 postlateral angles are widely rounded and 

 not produced. The epimera of these seg- 

 ments extend nearly the entire length of 

 the lateral margin and are in the form of 

 narrow, elongated lobes, attached ante- 

 riorly and free posteriorly. 



The first five segments of the abdomen are about equal in length. 

 All are furnished with distinct epimera, those of the first two seg- 

 ments being produced in long narrow lamellae reaching the length of 



two segments beyond the one to which they are 

 attached. The epimera of the last three segments 

 are small and almost inconspicuous on the last 

 two. They decrease gradually in size. 



All the legs are prehensile in character and none 

 are furnished with a carina on the basis. * 



The terminal segment of the abdomen is lin- 

 guate. In the only specimen the posterior portion 

 is almost torn oft". The uropoda are also lost. 

 Locality. — One specimen. Station 13. It was 

 found in the stomach of Coryphaena sp., Sept. 5, 1899, in lat. 9° 57' 

 N., long. 137° 47' W. 



Type— Cat. No. 46,435, U. S. N. M. 



Fig. 7. — Nerocila 

 excisa. Terminal seg- 

 ment of abdomen. 8. X 



IDOTHEIDAE. 

 Pentidotea resecata (Stimpson). 



Idotca resecata Stimpson, Bost. joiirn. nat. hist., 18.57, 6, p. .504, pi. 22, fig. 7. 

 Pentidotea resecata Richardson, Bull. 54 U. S. N. M., 1905, p. 369-370. 



Locality.— Lat. 33° 40' N., long. 119° 35' W. Station 4,571. Four 

 specimens from surface. 



