34 Addison E. Verrlll, 



fingers cross when closed ; the carpus is sometimes twice as wide 

 as long and nearly as wide as the palm; in other specimens the 

 length exceeds the breadth. The smaller cheliped usually has the 

 carpus and merus less than half as wide as in the larger one. Both 

 fingers have tufts of elongated hairs on the margins, but no spines. 

 Uropods large, with the outer lamellae coalesced ; outer lobe only 

 slightly the shorter; inner branch shorter, longer than telson. 

 Telson short, broader than long, tapered and broadly rounded dis- 

 tally; two small proximal pits and a median distal fossa. Color 

 white. 



Length of type from Brazil, 52.2 mm., without antennae ; length 

 of carapace, 14.9 mm. ; of carpus and propodus together, 15.5 mm. 

 (M. J. R.) 



This species has been taken only once at Bermuda. It burrows 

 in the mud below low-tide level and may be nocturnal in habits. 

 Mamanguepe Reef, Brazil, and Porto Rico (M. J. Rathbun.) 

 Bermuda at St. David's Island (T. H. Bean, Field, N. Hist. Mus. 

 Exped., 1905). 



Suborder NATANTIA Boas. Shrimps and Prawns. 

 Key to the families of Natantia hitherto found at Bermuda. 



A. The epimera .of the first abdominal segment are not covered by those 

 of the second. Third pair of legs chelate; usually the first and second 

 pairs also; branchiae not foliaceous. 



B. Branchiae filamentous (trichobranchiate), not branched; body not 

 compressed nor carinate ; pleopods not segmented. 



Tribe Stenopidea. 



BB. Branchiae branched and plumose. 



Tribe Penccidea or Dendrobranchiata. 



b. Three pairs of chelae nearly equal and not very strong, the third pair 

 of legs longest. Rostrum usually long and dentate; carapace carinated 

 dorsally; an epipodite on the second maxillipeds. 



Family Penaidcc. 



c. Ocular segment without styliform spines beneath. 



Subfamily Pence hue. 



cc. Ocular segment with a pair of styliform spines. 



Subfamily Sicyonin<c. 



bb. First pair of legs reduced and without chelae. Chelae of second and 

 third pairs minute, sometimes lacking on second pair. Rostrum 

 usually small and simple. 



