213 



two distal and two proximal teeth as in CelMaria rigida and several other spe- 

 cies. In E. rhomboidalis and E. elegans the structure of the ooecia seems to be 

 similar to that in CelMaria. 



Suborder Ascophora. 



A compensation-sac occurs, which most often opens out immediately on the 

 proximal side of the operculum, more rarely further back through a median pore 

 (an ascopore). The operculum is generally a compound one more or less strongly 

 chitinized, consisting of a distal valvular part bounded by the hinge-line and 

 opening outwards, and of a proximal part opening inwards, which may be looked 

 upon as the operculum of the compensation-sac. More rarely a simple operculum 

 is found the proximal margin of which coincides with the hinge-line, and in 

 that case the compensation-sac opens out through a median pore. The hetero- 

 zooecia have as a rule a calcified transverse bar between the opercular area and 

 the subopercular area. 



Family Catenariidae ^ nov. nomen. 



Catenicellidae auct. 



(Pis. X-XIII, Pis. XX, XXI, XXIII). 



The frontal surface consisting of a gymnocyst has either a semi-circle of 



larger or smaller fenestrse (most often 5 — 7) or a number of scattered, larger or 



' In one of the plates (Polypes, PI. 13) accompanj'ing the great work on Egypt Savigny who did 

 not succeed in describing the Bryozoa, of which he has given so excellent figures, has at the bottom of 

 the plate designated two species in the plate numbered as 1 and 2, as »Catenaires« and as he always 

 in his plates designates the genera with a French name in the plural form very similar to the 

 Latin generic name (e. g. Euphrosynes =^ Euphrosyne, Polynoes = Polynoe, Terebelles = Terebella, 

 Gemellaries = Gemellaria, Chlidonies = Chlidonia) there cannot be the least doubt that the French 

 name »Catenaires« corresponds to a Latin generic name Catenaria. Audouin, who has given names 

 to Savigny 's species, without regard to the generic name given by Savigny, refers the two spe- 

 cies to the genus Eucratea and names them E. Contei and E. Lafontii. To this genus however, they 

 do not belong. In Manuel d'Actinologie p. 462 Blainville admits that Savigny has established 

 a genus Catenaria, but without justification modifies the name to Catenicella, and to this genus he 

 refers Catenaria Contei, the name of which he changes to C. Savignyi. The definition Blainville 

 gives of the genus Catenicella is partly made from Savigny's figures of C. Contei partly from 

 Hippothoa divaricata which he thinks is perhaps identical with C. Contei, and Blainville has thus 

 completely misunderstood the genus to which his name has ever since been associated. D ' r b i g n y 

 has later instituted a genus Catenaria in which he placed C. Lafonii. 1 propose to keep the genus 

 Catenaria Savigny with the type-species C. Contei, but whether Savigny's name is acknowledged 

 or not, Blainville's name cannot in any case be maintained. If S a v i g n y is acknowledged as author 

 of the genus Catenaria then the name Catenicella is only a synonym and if not, it is in my opinion 

 absolutely contrary to good sense that Blainville 's name should be associated with a genus which 

 he has not only completely misunderstood but of which he has not seen any species, In that case 

 the genus must be named Vittaticella Maplestone, 



