ON RECENT POLYZOA. 491 
Family XVII. Onchoporide. 
Genus 55. Onchopora. Genus 56. Onchoporella. 
Family XVIII. Reteporide. 
Genus 57. Retepora. Genus 59. Turritigera. 
», 08. Reteporella. 
Family XIX. Cribrilinide. 
Genus 60. Cribrilina. Genus 61. Membraniporella. 
Family XX. Microporellide. 
Genus 62. Flustramorpha. Genus 63. Microporella. 
[Family XXa. Not accounted for by Mr. Busk. 
Genus (?) Diporula, Hincks. Genus (?) Monoporella, Hincks. ] 
Family XXI. Escharide. 
Genus 64. Eschara. Genus 73. Gephyrophora. 
» 65. Lepralia. 5, ¢4. Myrizoum. 
», 66. Chorizopora. » 7d. Haswellia. 
» 67. Porella. » 76. Tessaradoma. 
_ » 68. Escharoides. », ~@¢. Gemellipora. 
me, 69. Smittia. 5, %8(?). Umbonula,' Hincks. 
_ , 70. Micronella. » @8(?). Phylactella,! Hincks (pt). 
_y 71. Aspidostoma. », @9(?). Palmicellaria,! Hincks. 
» 2. Schizoporella. 
Family XXII. Adeonez. 
Genus 80. Adeona. Genus 82. Reptadeonella. 
» 81. Adeonella. 
Family XXIII. Celleporide. 
Genus 83. Cellepora, Fabricius. 
a Family XXIV. Selenariade. 
Genus 84. Cupularia. Genus 85. Lunularia. 
It appears to me very improbable that Mr. Hincks will prefer the 
¢lassification of Mr. Busk for that of his own. In his published papers, 
Since the issue of the ‘Challenger’ Report, Mr. Hincks takes his own 
course, and it would be impertinent on my part to interfere with his 
arrangement. The pumbered consecutive families and genera are those 
of the ‘British Marine Polyzoa’; the interpolated families and genera 
(unnumbered) are the additions Mr. Hincks has been compelled to adopt . 
im his study of the many foreign groups placed in his hands by collectors 
and others. 
¥ Sus-orper. CHEILOSTOMATA, Bush. 
Family I. Ateide, Hincks. 
Genus I. Altea, Lamourouw (1). 
? Only partly accounted for in the classification of Mr. Busk 
