374 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [30] 



from above or below, aud armed with about eight acutely triangular 

 teeth, beyond which there are several small teeth on the anterior edge; 

 on the left side the mesial edge, as seen from above or below, is straight 

 or slightly concave, terminates anteriorly in a sharp angle, beyond 

 which there are no teeth on the anterior edge, and the teeth on the an 

 terior part of the mesial edge are very small, though back of these 

 small teeth there are about as many and as large teeth as on the mesial 

 edge of the right mandible. The y^rotoguathal lobes of the first maxilla 

 are approximately equal in size, broad at the ends, and armed as usual 

 with slender spines upon the distal, and numerous setae upon the proxi- 

 mal lobe. The endognath is small, obtusely pointed, and armed with a 

 very few marginal setae and with two slender spines upon a small fold 

 on the ventral side near the tip. The protagnathal lobes of the second 

 maxilla are very unequal, the proximal lobe is broad but very short, 

 while the distal is long and deeply divided into two narrow and obtuse 

 lobes. The endognath is unsegmented, short, and narrowed to a slender 

 tip. The scaphognath projects anteriorly slightly beyond the endog- 

 nath, and both ends are broad and evenly rounded. 



The protopod of the maxilliped projects very little anteriorly, and 

 iS obscurely divided into a very small proximal and a large distal 

 lobe. The endopod is well developed and composed of three segments, 

 of which the proximal is very short, broader than long, the second 

 nearly three times as long as broad, the terminal a little smaller than 

 the second, and lanceolately pointed, and all the segments margined 

 with setae. The exopod is a very large lamelliform lobe, longer than 

 the endoi^od, about a third as broad as long, expanded aud broadly 

 rounded in outline distally, and edged with plumose setae, wliich grad- 

 ually increase in size distally along the margin. The epipod is small, 

 branchial, with the anterior and posterior parts approximately equal. 

 The ischium in the first gnathopod is much shorter than broad, the 

 merus between two and three times as long as broad, the carpus a 

 little narrower than the merus aud about as long as broad, the pro- 

 podus bent back upon the merus, as in most Palaemonidae, a little 

 longer than the merus, nearly half as broad as long, and obliquelj' 

 truncated along the mesial edge for the articulation of the dactylus, 

 which is more than twice as broad as long, and armed with setae and 

 slender spines, as is the mesial and anterior edge of the dactylus. The 

 exopod is nearly as long as the endopod, slender, and multiarticulate 

 and flagelliform for more than half its length. The epipod is broad at 

 base, somewhat triangular, and bears a large phyllobranchia. The endo- 

 pod of the second gnathopod reaches a little beyond the middle of the 

 autennal scale, and is slender and comi)osed of three segments, of which 

 the proximal is the longest, reaches as far forward as the anterolateral 

 angle of the carapax, and is strongly curved and dorsally compressed 

 in the middle opposite the mouth ; the middle and the distal segments 

 are straight, the middle about half as long, and the distal nearly as 



