﻿NO. 
  1139. 
  DEEP-WATER 
  MOLLUSC 
  A— 
  VEEBILL 
  AXD 
  BCSH. 
  885 
  

  

  hh. 
  Shell 
  lanceolate 
  or 
  long-ovate, 
  posteriorly 
  narrowed 
  and 
  somewhat 
  elon- 
  

   gated, 
  more 
  or 
  less 
  sinuous 
  below 
  ; 
  rostrum 
  slightly- 
  defined, 
  smooth 
  or 
  slightly 
  

  

  carinate; 
  external 
  ligament 
  feebly 
  developed 
  Yoldia 
  (sense 
  restricted). 
  

  

  hhh. 
  Shell 
  oblong, 
  smooth, 
  plain, 
  blunt 
  and 
  rounded 
  at 
  both 
  ends, 
  without 
  any 
  

  

  distinct 
  carina, 
  sinuosity 
  or 
  rostrum 
  Ortlioijoldid 
  Verrill 
  and 
  Bush. 
  

  

  hhhh. 
  Shell 
  thiu, 
  compressed, 
  narrow-lanceolate 
  or 
  Icmg-elllptical, 
  nearly 
  equi- 
  

   lateral, 
  and 
  gaping 
  at 
  both 
  ends; 
  sculpture 
  oblicjue. 
  

  

  Adrana 
  H. 
  and 
  A. 
  Adams, 
  

   hhlilili. 
  Shell 
  hyaline, 
  oblong-ovate, 
  broad 
  posteriorly, 
  concentrically 
  sculp- 
  

   tured, 
  rostrum 
  nearly 
  obsolete 
  A 
  draneUa 
  Verrill 
  and 
  Bush. 
  

  

  fig. 
  Shell 
  thiu, 
  obloug, 
  inequilateral, 
  blunt 
  at 
  both 
  ends, 
  not 
  rostrated 
  nor 
  cari- 
  

   nated 
  ; 
  teeth 
  few, 
  lamellar, 
  very 
  oblique. 
  Type, 
  S. 
  frafi'ilis 
  Jetfreys. 
  

  

  Silicnla 
  Jeftreys. 
  

   <ia. 
  Shell 
  small, 
  nearly 
  plain, 
  not 
  much 
  rostrated 
  nor 
  carinated; 
  resilium 
  with- 
  

   out 
  a 
  prominent 
  chondrophore, 
  situated 
  in 
  a 
  notch 
  in 
  the 
  hinge-margin, 
  inter- 
  

   rupting 
  the 
  series 
  of 
  teeth. 
  

   7. 
  Teeth 
  V-shaped, 
  numerons 
  in 
  both 
  series. 
  

   m. 
  Shell 
  oblong 
  or 
  subovate, 
  blunt 
  posteriorly, 
  with 
  a 
  slightly 
  sinuous 
  margin, 
  

  

  sometimes 
  subrostrate, 
  not 
  carinate 
  Yoldiella 
  Verrill 
  and 
  Bush. 
  

  

  mm. 
  Shell 
  regularly 
  ovate, 
  rounded 
  at 
  both 
  ends, 
  not 
  sinuous 
  nor 
  carinate, 
  (?) 
  

  

  no 
  pallial 
  sinus 
  Sarej^ta 
  A. 
  Adams. 
  

  

  U. 
  Shell 
  short-ovate, 
  not 
  sinuous 
  nor 
  angulated; 
  teeth 
  few, 
  oblique, 
  not 
  regu- 
  

   larly 
  V-shaped. 
  Type, 
  P. 
  oratiis 
  Segueuza 
  Phaseohts 
  Segueuza. 
  

  

  CC. 
  Xo 
  true 
  resilium; 
  ligament 
  well 
  developed, 
  often 
  prominent 
  behind 
  the 
  beaks 
  

  

  Avhich 
  are 
  usually 
  turned 
  forward. 
  

   D. 
  Siphon 
  tubes 
  and 
  pallial 
  sinus 
  present; 
  teeth 
  mostly 
  V-shaped, 
  in 
  two 
  long 
  

   series, 
  often 
  interrupted 
  by 
  a 
  median 
  edentulous 
  space. 
  

  

  Malleiinw 
  H. 
  and 
  A. 
  Adams. 
  

   0. 
  Siphon 
  tubes 
  long; 
  pallial 
  sinus 
  large; 
  shell 
  elongated, 
  gaping. 
  

   J). 
  Shell 
  oblong 
  or 
  elliptical, 
  blunt 
  posteriorly, 
  not 
  distinctly 
  rostrate; 
  series 
  of 
  

  

  teeth 
  unequal; 
  those 
  in 
  the 
  anterior 
  series 
  fewer 
  Malletia 
  Desmoulins. 
  

  

  jjj>. 
  Shell 
  long-ovate 
  or 
  oblong, 
  broadly 
  angulated 
  and 
  sinuous 
  posteriorly; 
  dis- 
  

   tinctly 
  rostrate 
  and 
  carinate; 
  two 
  series 
  of 
  teeth 
  nearly 
  equal. 
  

  

  Neilo 
  H. 
  and 
  A. 
  Adams. 
  

   00. 
  Siphon 
  and 
  pallial 
  sinus 
  small, 
  shell 
  ovate, 
  not 
  gaping; 
  a 
  rudimentary 
  mar- 
  

   ginal 
  resilium 
  XeilovcUa 
  Dall. 
  

  

  DD. 
  Shell 
  short-ovate 
  or 
  subcordate, 
  closed 
  at 
  both 
  ends, 
  umbos 
  prominent; 
  liga- 
  

   ment 
  entirely 
  external; 
  series 
  of 
  teeth 
  generally 
  continuous. 
  

  

  Tindarimv 
  Verrill 
  and 
  Bush. 
  

   s. 
  Shell 
  regularly 
  ovate, 
  grooved, 
  without 
  rostrum 
  or 
  carina; 
  beaks 
  turned 
  

  

  forward 
  ; 
  no 
  pallial 
  sinus 
  T'nidaria 
  Bellardi. 
  

  

  ss. 
  Shell 
  ovate, 
  with 
  a 
  distinct 
  posterior 
  sinuosity 
  and 
  a 
  short 
  rostrum. 
  

  

  Ti7idarioj}sis 
  Verrill 
  and 
  Bush. 
  

  

  Family 
  S0LE:N^0MY1D.^. 
  

  

  SOLEMYA 
  GRANDIS, 
  new 
  species. 
  

   (Plate 
  LXXXVI, 
  figs. 
  1, 
  2.) 
  

  

  Sliell 
  large, 
  considerably 
  broader 
  anteriorly 
  than 
  posteriorly, 
  dorsal 
  

   margin 
  in 
  front 
  of 
  the 
  beaks 
  straight 
  and 
  thickened 
  by 
  an 
  internal 
  

   ridge 
  and 
  a 
  strong 
  epidermal 
  fold. 
  At 
  the 
  anterior 
  end 
  the 
  valves 
  gape 
  

   widely, 
  and 
  the 
  edge 
  of 
  each 
  is 
  divided 
  into 
  six 
  or 
  seven 
  long, 
  nearly 
  

   regnlar, 
  digitate 
  processes 
  of 
  nearly 
  uniform 
  width, 
  and 
  obtusely 
  

   rounded 
  at 
  the 
  ends, 
  separated 
  by 
  notches, 
  rounded 
  proximally. 
  The 
  

  

  