ART. 8 CRUSTACEANS FROM WESTERN ATLANTIC TATTEESALL H 



Maxillulae with a definite shoulder on the outer margin of the outer 

 plate proximal to which are a few minute spinules; inner plate with 

 two setae. 



Maxillae with the proximal lobe narrow; distal lobe divided into 

 two parts by a short furrow; palp long, distal joint narrowly oval, 

 nearly twice as long as broad and twice as long as the proximal joint; 

 exopod long and narrow, setae present only on its outer margin and 

 the distal setae much longer than the proximal. 



First thoracic limbs of the normal form characteristic of the genus 

 with the second and third joints of the endopod fused; the limbs are 

 rather shorter and stouter than in the European species of the genus 

 especially with regard to the sixth joint; seventh joint not longer 

 than broad; dactylus stout and straight. 



Second thoracic limbs with the endopod relatively enormously 

 developed, much more robust than in any known species of the genus 

 and as far as the present material goes, more robust in the female than 

 in the male ; this relative development of the limbs is attained mainly 

 by the large size of the sixth joint which is one-quarter longer than the 

 fifth and four times as long as broad; it is widest just distal to the 

 middle and from this point the joint narrows considerably, the distal 

 portion of the inner margin being slightly concave and armed with 

 numerous spiniform setae; the outer distal margins are also armed 

 with numerous setae; the seventh joint is about one-fourth of the 

 length of the sixth and terminates in a strong somewhat curved nail; 

 the outer margin is convex and the inner margin concave and fringed 

 also v/ith spiniform setae; the inner face of this joint is armed with 

 numerous very strong setae which are barbed on one side only; the 

 concave inner margin of the seventh joint folds down against the 

 distal portion of the inner margin of the sixth joint to form a kind of 

 subchela to the limb; in the male specimens, which are, however, 

 immature, the second thoracic limbs have the same general form as 

 in the female just described but appear to be less robust and the 

 subchelatc appearance of the limbs is less well marked. 



Remaining thoracic limbs with the sixth joint of the endopod 

 divided into two subjoin ts by a transverse suture; seventh joint very 

 short and terminating in a long slender nail. 



Abdomen with the sixth somite one and two-thirds time as long as 

 the fifth. 



Pleopods in the only males available, which are immature, are all 

 distinctly biramous. 



Telson as long as the sixth abdominal somite, one and a third times 

 as long as broad at the base and three times as long as the breadth 

 at the apex, entire and broadly linguiform in shape with the apex 

 broadly rounded; lateral margins with about twelve short stout 

 spines distributed along the whole length; apex armed with three 



