﻿14 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL. 
  MUSEUM 
  

  

  MULTICRESCIS 
  GALAEFERA, 
  new 
  species 
  

  

  Plate 
  21, 
  figs. 
  1-4 
  

  

  Description. 
  — 
  The 
  zoarium 
  is 
  large, 
  massive, 
  subcylindrical, 
  hollow 
  

   at 
  the 
  base, 
  solid 
  at 
  the 
  summit, 
  multilamellar. 
  The 
  orifices 
  are 
  

   polygonal 
  or 
  subcircular, 
  oblique, 
  ornamented 
  by 
  a 
  very 
  short 
  and 
  

   irregularly 
  placed 
  visor. 
  The 
  mesopores 
  are 
  polygonal, 
  somewhat 
  

   smaller 
  than 
  the 
  apertures. 
  

  

  Measurements. 
  — 
  Diameter 
  of 
  aperture, 
  0.08 
  mm. 
  ; 
  diameter 
  of 
  meso- 
  

   pores, 
  0.06 
  mm.; 
  dimensions 
  of 
  zoarium, 
  2.5 
  byl.5 
  mm. 
  

  

  S 
  tructur 
  e. 
  — 
  V 
  e 
  r 
  y 
  

   probably 
  Mnlticrescis, 
  

   provided 
  with 
  visors, 
  as 
  

   in 
  the 
  present 
  species, 
  

   belong 
  to 
  the 
  family 
  Li- 
  

   chenoporidae, 
  but 
  in 
  the 
  

   absence 
  of 
  ovicells 
  we 
  

   prefer 
  to 
  preserve 
  the 
  

   zoarial 
  classification. 
  

  

  The 
  longitudinal 
  sec- 
  

   tion 
  shows 
  that 
  the 
  la- 
  

   mellae 
  are 
  formed 
  by 
  

   orbicular 
  subcolonies 
  

   united 
  laterally. 
  Each 
  

   of 
  them 
  arises 
  from 
  the 
  

   development 
  of 
  a 
  

   lateral 
  tube 
  of 
  an 
  in- 
  

   ferior 
  subcolony. 
  The 
  

   tubes 
  acylindrical, 
  with 
  

  

  Fig. 
  2.— 
  Genus 
  Afulticrescis 
  D'Orbigny, 
  1881. 
  A. 
  Multkrexcis 
  la- 
  (Joi'Sal 
  °"emmation 
  and 
  

   niellosa, 
  new 
  species. 
  Portion 
  of 
  a 
  transverse 
  section, 
  X 
  lfi, 
  with 
  . 
  , 
  . 
  , 
  . 
  ■, 
  . 
  -.-. 
  

  

  two 
  lamellae. 
  Lower 
  Cretaceous 
  (Valangian): 
  Sainte-Croix, 
  With 
  thickened 
  Walls. 
  

  

  Switzerland. 
  B. 
  Multicrescis 
  galaefera, 
  new 
  species. 
  Meridian 
  The 
  meSODOTeS 
  are 
  nil 
  Ill- 
  

   section, 
  X 
  16. 
  The 
  subcolonies 
  grow 
  from 
  a 
  lateral 
  tube 
  of 
  an 
  , 
  - 
  . 
  

  

  inferior 
  subcolony. 
  Lower 
  Cretaceous 
  (Valangian): 
  Sainte- 
  erOUS 
  ailCl 
  Ol 
  Unequal 
  

  

  Croix, 
  Switzerland 
  length 
  

  

  Occurrence. 
  — 
  Lower 
  Cretaceous 
  (Valangian): 
  Sainte-Croix 
  (Vaud), 
  

   Switzerland 
  (rare). 
  

  

  Cotypes. 
  — 
  Cat. 
  No. 
  69854, 
  U.S.N.M., 
  and 
  Museum 
  Comparative 
  

   Zoology. 
  

  

  MULTICRESCIS 
  PARVIPORA, 
  new 
  species 
  

  

  Plate 
  20, 
  figs. 
  9-11 
  

  

  Description. 
  — 
  The 
  zoarium 
  is 
  globular, 
  borne 
  on 
  a 
  narrow 
  base, 
  

   formed 
  of 
  many 
  completely 
  enveloping 
  lamellae. 
  The 
  orifices 
  are 
  

   very 
  small, 
  arranged 
  in 
  quincunx, 
  ornamented 
  with 
  a 
  very 
  small 
  

   irregular 
  visor. 
  The 
  mesopores 
  are 
  very 
  small, 
  polygonal, 
  arranged 
  

   quite 
  irregularly. 
  

  

  