384 U.S. NATIONAL MUSEUM BULLETIN 236 



species of Laophontidae with 3-segmented endopodites of legs 2 to 4. 

 The structure of antennules, antenna, mouth parts, and legs 2 to 5 

 suggests in many details the Diosaccidae; indeed, I would have been 

 inclined to include this species in the Diosaccidae except for the very- 

 different structure of leg 1, Furthermore, this species is re- 

 markable by the presence of lanceolate spines on the maxillular 

 arthrite and on the exopodites of legs 2 to 4, and by the presence of 

 several spatulate setae. The rostrum does not conform to either 

 Laophontidae or Diosaccidae. 



The curious combination of characters and particularly the ab- 

 sence of the male has forced me to introduce a new genus for the 

 reception of this species, the description of which, unfortunately, 

 must remain incomplete until the discovery of the male. This new 

 genus, Pholenota, combines characters of Laophontidae and Diosac- 

 cidae and only very provisionally has been placed here at the end 

 of the Laophontidae. The generic name proposed, Pholenota, is an 

 anagram of Laophonte. The trivial name for its type species, spatu- 

 lifera, refers to the presence of spatulate setae on the legs. 



Pholenota spatulifera, new species 



Figures 150, 151 



Material.— Loc. 638, 1 ad. 9, 0.48 mm. 



Description. — The following is based on the above-mentioned 

 holotype specimen, which has been dissected and mounted. 



Adult female, total length 0.48 mm.; greatest diameter 0.11 mm.; 

 length of longest f ureal seta 0.15 mm. 



Body slender and cylindrical, with distinct separation between 

 cephalothorax and abdomen. Greatest diameter at end of cephalic 

 somite, anteriorly rounded, posteriorly narrowing gradually, slightly 

 dilated in genital region. Head and 1st thoracic somite completely 

 fused ; cephalic somite as long as combined lengths of thoracic somites 

 2 to 4. Cephalic somite in lateral aspect with smoothly rounded 

 back, curving into small rostrum (fig. 150a). Sides slightly produced 

 and rounded. Rostrum small, more or less rectangular plate with 

 rounded corners, hollowed centrally and separated from head by 

 distinct groove pointing forward and slightly downward, as long 

 as 1st antennular segment. Some chitinized ridges at end of cephalic 

 somite that create impression of distal teeth (fig. 1506). Thoracic 

 somites 2 to 4 of equal length, epimeral plates slightly produced, 

 rounded. 



5th thoracic somite distinctly visible laterally and dorsally, slightly 

 broader than preceding somite. Genital somite resulting from 

 fusion between abdominal somites 1 and 2, as long as combined 

 lengths of abdominal somites 3 and 4. Line of fusion very distinct 



