178 U.S. NATIONAL MUSEUM BULLETIN 236 



Maxillipede (fig. 657) chelate, with short coxa, carrying 1 seta. 

 Basis scarcely swollen, without setae. Endopodite present as a 

 single, claw-shaped segment, tapering into fine point, slightly shorter 

 than basis. There are no setae on the endopodite. 



Exopodite of leg 1 (fig. 65a) 3-segmented, endopodite 2-segmented. 

 Coxa with external swelling, carrying some spines. Basis at internal 

 and external border with strong spine; spines and margins haired. 

 Endopodite and exopodite of same length; 1st and 2nd exopodal 

 segments elongated, of same length, each with external spine, 2nd 

 with internal seta. 3rd exopodal segment small, with total of 5 

 appendages, 4 claws (increasing in size apically) and 1 seta. 1st 

 endopodal segment styliform, 2}^ times as long as wide, external 

 margin strongly spinuous. Internal margin with seta halfway along 

 its length. 2nd endopodal segment small, with 2 strong claws and 

 some spinules. 



The various details of the legs can best be taken from figure Q5b-d; 

 the setal formula is : 



External margins of exopodites and endopodites set with spinules. 



Leg 5 (fig. 65e) small, external lobe of baso-endopodite elongate, 

 with fine seta. Exopodite twice as long as broad, with 5 long setae, 

 proximal parts of internal and external margins spinulose. Baso- 

 endopodite broad, reaching halfway along exopodite, with 4 long 

 setae and 1 short seta, insertion of setae separated from exopodite 

 by wide gap. 



Ventral aspect of genital somite represented in figure 65/. Color 

 completely faded in alcohol, yellowish green, transparent. No eye visible. 



Remarks. — The setal formula of the specimen described indicates 

 that it belongs in the subfamily Pseudotachidiinae. The 7-segmented 

 antennules and a small antennal exopodite indicate either the genus 

 Idomene or Dactylopodella. I have brought this new species to 

 Dactylopodella because of the strong development of the rostrum and 

 the scarcity of plumose setae on the antennules, but the distinction 

 between both genera, at least in the sense expressed in Lang's defi- 

 nitions of these genera, is a bit vague and needs reconsideration. 

 The present new forms differ from the species now in the genus 

 Dactylopodella by the presence of hooked claws on the 3rd exopodal 

 segment of leg 1 and the fairly distinct separation of the rostrum 

 from the cephalic somite. It differs from D. jiava and D. clypeata in 

 the 3-segmented endopodite of leg 2, in which it approaches D. rostrata 

 (3-segmented endopodite of leg 1) and D. ornata. From the latter it 

 differs by the armature of 2nd endopodal segment of leg L 



