42 STOMATOPORA. 



Affinities. This family contains a group of the simplest known 

 forms of Cyclostomata. It includes the members of the family 

 Tubuliporidae founded by Busk in 1859, with the addition of the 

 genus Diastopora and its allies. It includes most of the forms 

 included byHincks in the Tubuliporidae, but by no means all. The 

 sense in which it is here used agrees closely with that in which it 

 was accepted by MacGillivray. 



STOMATOPORA, Bronn, 1 1825. 



SYNONYMY : 



Alecto, Lamouroux, 1821. 

 Aulopora, pars, Goldfuss, etc. 



Diagnosis. Tubuliporidaa with the zooecia forming flat adnate 

 zoaria, composed of uniserial lines. These zooecial lines branch 

 dichotomously, and sometimes anastomose into a reticulate web. 

 The cell mouth is flush or slightly raised ; zooecia tubular or sub- 

 pyriform. 



Type species. S. dichotoma, Lamouroux, 1821. 



Affinities. This genus, in its normal form of a fan-shaped 

 zoarium, is very well marked off from other Cyclostomata. The 

 genus to which it approaches most nearly is Proloscina ; this is 

 included by Hincks as a subgenus of Stomatopora. Such species 

 as that described by Haime as Stomatopora bouckardi, Haime, cer- 

 tainly do seem like connecting links. Nevertheless there seems 

 such a very different appearance in the simple series of zooacia, 

 from that of those with the zooecia in multiple series, that it seems 

 to me advisable to use this as a generic distinction. 



Stomatopora, as here used, includes, therefore, only part of the 

 species included in it by Haime and Hincks. It is here restricted, 

 and the genus Proboscina enlarged. Haime includes in Stomato- 

 pora some multiserial species, and Hincks a group of forms which 

 are partially erect and free. 



The genus was first described as Alecto by Lamouroux, in 1821. 

 Mr. Hincks proposed the substitution of Bronn's term, owing to 

 the prior use of Alecto among Crinoids. As Alecto is, however, 



1 Bronn. Syst. Pflanz. p. 27, pi. vii. fig. 3. 



