﻿MELVILL 
  : 
  PYEAMIDELLID^ 
  OF 
  THE 
  PERSIAN 
  GULF, 
  ETC. 
  187 
  

  

  I 
  replace 
  it 
  now 
  among 
  the 
  TtirlotiiUa, 
  considering 
  it 
  well 
  harmonizes 
  

   with 
  the 
  members 
  of 
  the 
  sub-genus 
  Pyrgiscus, 
  Phil. 
  

  

  It 
  occurred 
  plentifully 
  in 
  one 
  dredging 
  of 
  Mr. 
  Townsend, 
  but, 
  so 
  

   far 
  as 
  I 
  am 
  aware, 
  only 
  once. 
  It 
  is 
  eight-whorled, 
  white, 
  delicate, 
  

   longitudinally 
  straightly 
  ribbed, 
  ribs 
  smooth, 
  interstices 
  finely 
  spirally 
  

   filostriate, 
  mouth 
  roundly 
  ovate, 
  outer 
  lip 
  slightly 
  effuse, 
  columella 
  

   straight. 
  It 
  seems 
  nearly 
  allied 
  to 
  Chrysallida 
  mumia,^ 
  A. 
  Adams, 
  

   from 
  Japan, 
  lately 
  relegated 
  by 
  Dall 
  & 
  Bartsch 
  to 
  the 
  section 
  Pyrgiscus 
  

   of 
  TurhoniUar 
  

  

  ToEBONiLLA 
  MicHAELis, 
  n.sp. 
  PI. 
  V, 
  Fig. 
  2. 
  

  

  T. 
  testa 
  parva, 
  gracillima, 
  attenuata, 
  nitida, 
  albo-lactea, 
  tenuicula, 
  

   anfractibus 
  ad 
  11, 
  quorum 
  duo 
  apicales 
  inversim 
  planorbuli, 
  hetero- 
  

   strophi, 
  cseteris 
  gradatulis, 
  ad 
  medium 
  paullum 
  constrictis, 
  omnino 
  

   laevissimis, 
  costis 
  crassis, 
  nitidis, 
  supra 
  juxta 
  suturas 
  spiraliter 
  

   gemmulatis, 
  ultimi 
  anfractus 
  numero 
  20, 
  apertura 
  ovata, 
  peristomate 
  

   supra 
  obtuse 
  angulato, 
  fere 
  continuo, 
  columella 
  recta, 
  simplice. 
  

   Long. 
  4, 
  lat. 
  1'25 
  mm., 
  sp. 
  maj. 
  

   „ 
  3, 
  „ 
  1 
  ,, 
  ,, 
  min. 
  

  

  Sab.—^.^. 
  Gulf 
  of 
  Oman, 
  lat. 
  25° 
  10' 
  1^., 
  long. 
  60° 
  34' 
  E., 
  

   45 
  fathoms; 
  also 
  lat. 
  25° 
  39' 
  N., 
  long. 
  57° 
  19' 
  E, 
  110 
  fathoms, 
  and 
  

   the 
  dredging, 
  so 
  often 
  quoted, 
  contiguous 
  to 
  this, 
  at 
  156 
  fathoms. 
  

  

  M.C. 
  Off 
  Charbar, 
  40 
  fathoms. 
  

  

  A 
  very 
  graceful 
  and 
  beautiful 
  little 
  species, 
  of 
  ornate 
  architecture. 
  

   In 
  addition 
  to 
  the 
  two 
  inversely 
  heterostrophe 
  nuclear 
  whorls 
  there 
  

   are 
  nine, 
  elaborately 
  decorated 
  with 
  proportionately 
  thick, 
  smooth, 
  

   shining 
  ribs, 
  the 
  interstices 
  being 
  likewise 
  smooth. 
  The 
  slight 
  

   median 
  constriction 
  tends 
  to 
  the 
  gemmulate 
  appearance 
  of 
  the 
  ribs 
  

   just 
  below 
  the 
  sutures. 
  The 
  peristome 
  is 
  obtusely 
  angled 
  at 
  the 
  

   upper 
  part, 
  and 
  almost 
  continuous. 
  Columella 
  simple. 
  Named 
  after 
  

   my 
  grandson, 
  Michael 
  Ernest 
  Melvill. 
  

  

  Tdrbonilla 
  microperone, 
  Melvill. 
  

  

  Turhonilla 
  microperone, 
  Melvill, 
  Proc. 
  Make. 
  Soc, 
  vol. 
  vi, 
  p. 
  162, 
  

   pi. 
  X, 
  fig. 
  11. 
  

  

  Mah.—V.G. 
  Gulf 
  of 
  Oman, 
  lat. 
  24° 
  58' 
  N., 
  long. 
  56° 
  54' 
  E., 
  

   156 
  fathoms, 
  shell-sand. 
  

  

  A 
  somewhat 
  incrassate 
  species, 
  to 
  be 
  known 
  from 
  its 
  congeners 
  in 
  

   these 
  seas 
  by 
  the 
  flexuous, 
  thick, 
  oblique 
  ribs, 
  which 
  are 
  not 
  of 
  

   a 
  very 
  pronounced 
  character. 
  This 
  species 
  has 
  only 
  rarely 
  occurred. 
  

  

  TuRBoisriLLA 
  NEOGiLA,^ 
  n.sp. 
  PI. 
  V, 
  Pig. 
  3. 
  

  

  T. 
  testa 
  attenuato-oblonga, 
  nitida, 
  delicata, 
  pallide 
  stramineo-alba, 
  

   anfractibus 
  7, 
  quorum 
  2 
  J 
  apicales, 
  parvi, 
  vitrei, 
  heterostrophi, 
  cseteris 
  

   leniter 
  gradatulis, 
  fere 
  rectis, 
  delicate 
  et 
  arete 
  longitudinaliter 
  striato- 
  

   costatis, 
  interstitiis 
  tenuiter 
  striatulis, 
  ultimo 
  anfractu 
  prolongato, 
  

  

  ' 
  Ann. 
  Mag. 
  Nat. 
  Hist., 
  vol. 
  vii, 
  p. 
  45, 
  1861. 
  

  

  2 
  Proc. 
  U.S. 
  Nat. 
  Mus., 
  vol. 
  xxx, 
  p. 
  343, 
  pi. 
  xvii, 
  fig. 
  1. 
  

  

  * 
  pe6yi\os, 
  newly 
  introduced. 
  

  

  