﻿256 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  103 
  

  

  Sphaerosyllis 
  latipalpis 
  Levinsen, 
  1882, 
  p. 
  244. 
  — 
  Augener, 
  1928, 
  p. 
  722, 
  pi. 
  11, 
  

   fig. 
  3; 
  1939, 
  p. 
  140.— 
  Wesenberg-Lund, 
  1947, 
  p. 
  13, 
  fig. 
  4; 
  1951, 
  p. 
  38. 
  

  

  Sphaerosyllis 
  longicauda 
  Webster 
  and 
  Benedict, 
  1887, 
  p. 
  720, 
  pi. 
  3, 
  figs. 
  35-39. 
  — 
  

   Eliason, 
  1920, 
  p. 
  11, 
  fig. 
  3. 
  

  

  Oophylax 
  minuta 
  Treadwell, 
  1937, 
  p. 
  29, 
  figs. 
  6, 
  7. 
  

  

  Brania 
  sp. 
  Hartman, 
  1944a, 
  pi. 
  24, 
  figs. 
  1, 
  2. 
  

  

  Description. 
  — 
  Length 
  2-4.5 
  mm., 
  width 
  without 
  setae 
  0.3-0.5 
  mm., 
  

   segments 
  22-37. 
  Body 
  linear, 
  tapering 
  slightly 
  anteriorly 
  and 
  

   posteriorly, 
  oval 
  in 
  cross 
  section. 
  Body, 
  including 
  parapodia, 
  covered 
  

   with 
  small 
  papillae 
  and 
  incrusted 
  with 
  fine, 
  granular 
  material. 
  Pro- 
  

   stomium 
  subrectangular, 
  wider 
  than 
  long, 
  with 
  six 
  black 
  eyes, 
  four 
  

   larger 
  ones 
  (each 
  with 
  a 
  lens, 
  arranged 
  in 
  transverse 
  line 
  or 
  slightly 
  

   concave 
  arc 
  near 
  middle 
  of 
  prostomium) 
  and 
  two 
  small 
  anterior 
  ones. 
  

   Antennae 
  subequal, 
  bulbous 
  basally, 
  narrower 
  distally. 
  Paired 
  

   antennae 
  lateral 
  to 
  anterior 
  eye 
  spots; 
  median 
  antenna 
  more 
  posterior, 
  

   nearly 
  in 
  line 
  with 
  the 
  four 
  larger 
  eyes. 
  Palps 
  short, 
  wide, 
  rounded 
  

   anteriorly; 
  they 
  may 
  project 
  more 
  anteriorly, 
  extending 
  about 
  the 
  

   same 
  length 
  as 
  the 
  prostomium, 
  with 
  basal 
  halves 
  fused 
  and 
  distal 
  

   halves 
  separated 
  by 
  a 
  narrow 
  groove, 
  or 
  they 
  may 
  project 
  more 
  ven- 
  

   trally, 
  extending 
  only 
  about 
  half 
  the 
  length 
  of 
  the 
  prostomium, 
  and 
  

   fused 
  except 
  for 
  a 
  small 
  anterior 
  indentation; 
  ventrally 
  the 
  palps 
  

   are 
  not 
  fused 
  although 
  they 
  may 
  be 
  closely 
  approximated, 
  extending 
  

   back 
  to 
  the 
  level 
  of 
  the 
  four 
  large 
  eyes. 
  Tentacular 
  segment 
  not 
  

   distinctly 
  set 
  off 
  from 
  the 
  prostomium, 
  with 
  a 
  single 
  pair 
  of 
  tentacular 
  

   cirri 
  which 
  are 
  similar 
  to 
  the 
  antennae. 
  Dorsal 
  cirri 
  short, 
  slightly 
  

   longer 
  than 
  parapodial 
  lobes 
  and 
  shorter 
  than 
  the 
  setae, 
  inflated 
  

   basally, 
  tapering 
  to 
  narrow 
  tips; 
  they 
  may 
  be 
  similar 
  in 
  shape 
  through- 
  

   out 
  body 
  or 
  they 
  may 
  be 
  only 
  slightly 
  inflated 
  basally 
  in 
  middle 
  and 
  

   posterior 
  regions. 
  Dorsal 
  cirri 
  lacking 
  on 
  setiger 
  2. 
  Ventral 
  cirri 
  

   digitiform, 
  slightly 
  shorter 
  than 
  parapodial 
  lobes. 
  Anal 
  cutI 
  larger 
  

   than 
  dorsal 
  cirri; 
  anal 
  segment 
  with 
  several 
  larger 
  papillae. 
  Para- 
  

   podial 
  tip 
  usually 
  with 
  a 
  larger 
  papilla. 
  Neurosetae 
  consisting 
  of 
  a 
  

   single 
  long, 
  simple, 
  tapering, 
  curved 
  upper 
  seta, 
  the 
  rest 
  compound 
  

   with 
  distal 
  blades 
  long, 
  subequal, 
  entire, 
  hooked, 
  and 
  finely 
  pectinate. 
  

   Colorless 
  in 
  alcohol. 
  Female 
  (21 
  fathoms, 
  September 
  9, 
  1948) 
  with 
  

   large, 
  rounded 
  eggs 
  (larger 
  in 
  diameter 
  than 
  parapodial 
  length) 
  fastened 
  

   to 
  dorsal 
  surface 
  rather 
  irregularly 
  between 
  setigers 
  8-24, 
  one 
  to 
  four 
  

   per 
  segment, 
  attached 
  between 
  neuropodia 
  and 
  dorsal 
  cirri 
  and 
  just 
  

   medial 
  to 
  the 
  dorsal 
  cirri; 
  another 
  female 
  (36 
  fathoms, 
  October 
  6, 
  

   1949) 
  with 
  large, 
  oval-shaped 
  developing 
  larvae 
  (developing 
  setae 
  

   visible) 
  attached 
  to 
  the 
  dorsal 
  surface; 
  swimming 
  setae 
  lacking 
  (with 
  

   swimming 
  setae 
  in 
  male 
  — 
  Fauvel, 
  1923; 
  swimming 
  setae 
  m 
  both 
  male 
  

   and 
  female 
  beginning 
  on 
  setiger 
  8 
  — 
  Webster 
  and 
  Benedict, 
  1887; 
  

   eggs 
  on 
  ventral 
  base 
  of 
  feet 
  — 
  Wesenberg-Lund, 
  1947). 
  

  

  