214 BvXletin Vanderbilt Marine Museum, Vol. VI 



the Philippines (Schiodte and Meinert, Nierstrasz), and Durian 

 Straits (Boone). 



Material examined : One immature specimen, representing 

 the second stage of the young, dredged in 14 fathoms, muddy bot- 

 tom, near Equator, south of South Brother's Island, south entrance 

 of Durian Straits, Lat. 29' N. by Long. 104° 47' E., October, 1931. 



Technical description: Head not at all immersed in the 

 first thoracic segment; length in the median line about equal to 

 maximum width, which is across the posterior margin ; head tri- 

 angulate in shape, with the apex produced in a tongue-like process, 

 which arches over the antennal base and is rounded and truncate 

 distally. Eyes large, suboval, composed of coarse ocelli ; situated 

 in the lateral region and extending from the posterior margin 

 almost to the base of the frontal process; separated from each 

 other by a space about 1.5 millimeters wide at the narrowest point. 



The first pair of antennae is thickish, composed of eight ar- 

 ticles, and when extended reach the anterior margin of the first 

 thoracic segment. 



The second pair of antennae is slenderer and extend to the 

 posterior margin of the second thoracic segment. Each consists of 

 ten articles ; the fifth or last peduncular article is much the long- 

 est ; the five articles of the flagellum are similar, except that they 

 taper distally. 



Thorax: The first and second segments are subequal; the 

 third segm.ent is one and one-third times longer than the second; 

 the fourth and fifth segments are about equal and are subequal 

 to the first segment; the sixth and seventh segments are only a 

 little shorter than the fifth and subequal to each other. The epi- 

 mera are extended entirely across the second and third segments, 

 the third epimera being the longest of the entire series; on the 

 fourth, fifth, sixth and seventh segments the epimera extend 

 across only the anterior half or three-fifths of the lateral border 

 of the segments. 



Abdomen: The first, second and third segments are scarcely 

 differentiated in proportions from the seventh thoracic segment ; 

 the fourth and fifth segments are successively slightly shorter and 

 narrower; the telson is longer than wide, the width being only 

 three-fourths of the length; the distal margin is rounded and 

 setose. The uropoda have the peduncle two-fifths as long as the 



