78 BULLETIN OF THE 



of the .segment itself produced in a spiniform process outside the articulation 

 ■with the second segment ; the second and third segments are subequal in 

 length and nearly cylindrical. The flagella are imperfect in all the specimens 

 seen, but both were very long and slender-, the upper or major flagellum is 

 slightly compressed near the base but not suddenly expanded, and was at least 

 as long as the carapax and apparently very much longer : the inferior flagellum 

 was a little smaller at the base than the superior, cylindrical, and apparently 

 about as long as the superior. The antennal scale is thick and strong, seven 

 or eight tenths as long as the carapax excluding the rostrum, about a fourth as 

 broad as long, only slightly narrowed toward the tip, which is truncated and 

 does not extend bej^ond the strong tooth in which the thickened outer margin 

 terminates ; the second segment is armed with a small spiniform tooth below 

 the articulation of the scale ; the third segment projects scarcely beyond the 

 second ; the fourth and fifth are very short, and the fifth does not project more 

 than its diameter in front of the second. The flagellum is wanting in all the 

 specimens seen. 



The labrum is very large, the ventral surface flattened, broader than long, 

 and approximately rectangular, the antero-lateral angles being expanded below 

 so as to reach nearly as far forward as the middle portion, which projects in a 

 tuberculiform lobe a little above the plane of the ventral surface. The lobes 

 of the metastome are broad and rather fleshy, as in Pandalus. The molar 

 process of the mandible (PI. XIII. figs. 2, 2 a ) is stout, the mesial surface some- 

 what convex, and broken by several semicircular and concentric ridges, of which 

 the one nearest the base of the ventral process is armed with a closely-set series 

 of setse. The ventral process is thin, distally broad and somewhat concave 

 above, and armed with about eight rather slender teeth. The palpus is a little 

 longer than the ventral process, the first and second segments subequal in 

 length, and the third longer and much broader than the second, lamellar, and 

 armed with numerous seta?. The proximal lobe of the protognath of the first 

 maxilla (Fig. 3) is large, somewhat triangular, with the mesial edge two or three 

 times as long as that of the narrow distal lobe ; the endognath is much shorter 

 than the distal lobe of the protognath and truncated at the extremity, which is 

 armed with a stout seta either side and a third one just below the tip. The 

 second maxilla (Fig. 4) is very nearly as in the typical species of Pandalus : 

 the proximal lobe of the protognath is very much shorter than the distal, and 

 its small anterior division is more conspicuous than in the typical species of 

 Pandalus, while the two divisions of the distal lobe are nearly equal in size ; 

 the endognath is scarcely half as long as the distal lobe of the protognath ; the 

 anterior portion of the scaphognath is a little longer than the posterior, which, 

 as in the typical species of Pandalus, is narrowed to an acute point, and the 

 mesial edge furnished with exceedingly long setse, many times longer than those 

 upon the outer edge. 



The distal lobe of the protopod of the first maxilliped (Fig. 5) is somewhat 

 triangular in outline ; the two proximal of the three segments of the endopod 

 are subequal in length, while the distal segment is very short, but little longer 



