﻿508 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  

  

  No. 
  

  

  jyistomvm/iiliatutn, 
  new 
  species 
  

  

  tiitens, 
  new 
  species 
  

  

  tenue, 
  now 
  species 
  

  

  temte 
  tomissime, 
  new 
  sub 
  

   species. 
  

  

  SJK'C 
  il'S 
  

  

  Tachion 
  Cobbold 
  .' 
  

  

  clavatum 
  Rudolplii 
  

  

  species 
  (larva) 
  

  

  MoiiostoDi 
  itm 
  orbiculare 
  Rudolplii 
  . 
  . 
  

  

  Host. 
  

  

  Plate. 
  

  

  Molarnola 
  

  

  Tylosunis 
  caribbceus 
  . 
  

  

  Rdccns 
  lineatus 
  

  

  Morone 
  atnericaiia. 
  . 
  

  

  Lanocephalux 
  Icevigatus. 
  

  

  Qadus 
  callarias 
  

  

  Xiphias 
  yladius 
  

  

  Stizontedion 
  canadense 
  . 
  . 
  

  

  Lobotes 
  surinarnenxis 
  . 
  . 
  . 
  

  

  XLIX 
  

  

  L 
  

  

  LI 
  

  

  LI 
  

   LII 
  

   HI 
  

   LII 
  

  

  LIII 
  

   LIII 
  

   LIII 
  

   LIII 
  

   LIV 
  

   LIV 
  

  

  Figure. 
  

  

  3-0 
  

  

  1-3 
  

  

  1-4 
  

  

  5.6 
  

  

  1 
  

  

  2-8 
  

  

  9-12 
  

  

  1,2 
  

   3-7 
  

   8-11 
  

   12.13 
  

   1 
  

   2-5 
  

  

  1. 
  NITZSCHIA 
  ELEGANS 
  Baer. 
  

  

  Trtstoma 
  elongafinn 
  Nitzsch, 
  Dnjardin, 
  Hist. 
  Helm., 
  p. 
  323. 
  — 
  Ol.ssox, 
  Lmid's 
  

  

  Univ. 
  Arsskrift, 
  IV, 
  p. 
  17. 
  

   Nitsschia 
  clegans 
  Baeh, 
  Diesing, 
  Syst. 
  Helm., 
  I, 
  p. 
  426. 
  — 
  Van 
  Beneden 
  et 
  Hessk, 
  

  

  Rech., 
  pp. 
  67, 
  68. 
  

  

  Body, 
  reddish; 
  length, 
  13 
  to 
  22.5 
  mm.; 
  breadth, 
  4.5 
  to 
  7.8; 
  oblong; 
  

   contracted 
  i)osteriorly, 
  where 
  there 
  is 
  present 
  a 
  large, 
  almost 
  globular 
  

   sucker, 
  witli 
  a' 
  crenulate 
  border; 
  anterior 
  suckers 
  marginal, 
  linear, 
  

   oblique; 
  mouth 
  triangular. 
  

  

  Found 
  under 
  the 
  opercles 
  and 
  on 
  the 
  gills 
  of 
  the 
  sturgeon. 
  

  

  Three 
  specimens 
  from 
  gills 
  of 
  sturgeon 
  {Acipenser 
  sturio); 
  Woods 
  

   Holl, 
  Massachusetts, 
  August, 
  1884. 
  Dimensions 
  of 
  alcoholic 
  specimens 
  : 
  

   Length, 
  15 
  mm.; 
  breadth, 
  .').5to 
  5; 
  diameter 
  of 
  posterior 
  sucker, 
  4.5. 
  

  

  My 
  specimens 
  agree 
  with 
  the 
  above 
  synopsis 
  of 
  specitic 
  characters. 
  

   The 
  border 
  of 
  the 
  posterior 
  sucker 
  is 
  entire 
  when 
  expanded, 
  crenulate 
  

   when 
  contracted. 
  

  

  2. 
  NITZSCHIA 
  PAPILLOSA, 
  new 
  species. 
  

   (Plate 
  XL, 
  tigs. 
  1-6.) 
  

  

  Type. 
  — 
  No. 
  4874, 
  U.S.ISr.M.; 
  Woods 
  Holl, 
  Massachusetts, 
  December 
  

   15, 
  1885, 
  and 
  fourteen 
  specimens 
  from 
  cod 
  {Gadus 
  callarias) 
  gills 
  (!); 
  

   Vinal 
  N. 
  Edwards, 
  collector. 
  

  

  These 
  specimens 
  are 
  all 
  small. 
  

  

  These 
  specimens 
  differ 
  from 
  N. 
  elegans 
  in 
  their 
  very 
  much 
  smaller 
  

   size, 
  their 
  papillose 
  head, 
  the 
  absence 
  of 
  a 
  crenulate 
  border 
  on 
  the 
  

   posterior 
  sucker, 
  and 
  the 
  proportionately 
  more 
  elongated 
  body. 
  They 
  

   are 
  mostly 
  linear 
  oblong, 
  or 
  narrowly 
  linear 
  lanceolate; 
  body 
  contracted 
  

   ])osteriorly 
  in 
  front 
  of 
  a 
  large 
  sucker, 
  which 
  is 
  a 
  nearly 
  circular 
  disk 
  

   when 
  flattened 
  out, 
  with 
  entire, 
  thin 
  border, 
  radial 
  and 
  circular 
  tibers 
  

   evident: 
  unarmed. 
  There 
  are 
  no 
  mature 
  ova 
  and 
  the 
  specimens 
  are 
  

   evidently 
  young. 
  A 
  very 
  long, 
  tiliform 
  cirrus, 
  everted, 
  was 
  made 
  out 
  

   in 
  some 
  instances 
  (Fig. 
  4). 
  

  

  