125 



difficult to be entered upon in a brief communication. The enterocoeles 

 present no difficulty. The right anterior enterocoele has disappeared 

 as such, but its pore persists in Cephalodiscus and in Balanoglossus 

 Kupfferi. The left anterior enterocoele is the proboscis cavity, which 

 retains its pore. 



I may now revert to the question of the endostyle. The conside- 

 rations here advanced render it probable that an adorai ciliated band, 

 comparable to that of Auricularia, persists in some forms of Tornarla. 

 Mr. Eitter's note on the discovery of a ventral ciliated (?) tract in the 

 oesophagus of a Tornarla from the Pacific suggests to me that he has 

 very probably come across the desired homologue of this adorai band. 

 His preliminary description is, however, so incomplete that it is 

 impossible to be certain upon the point at present. The general truth 

 of the homologies which I have suggested seems to me to be so well 

 substantiated that I should be far from surprised if Mr. Ritter should 

 find, upon further examination, that the ciliated tract which he has 

 discovered possesses the loop-like arrangement characteristic of the 

 adorai band of Auricularia , of the corresponding structures in the 

 Tunicata, and of the endostyle of the larval AmpJiioxus. I publish this 

 note in the hope that he may be led to direct his attention towards 

 the possible existence of such an arrangement; and also to the impor- 

 tant theoretical point Avhether the approximated portions of the ciliated 

 bands do actually in ontogeny contribute to the formation of the medul- 

 lary plate which he describes. I am well aware that Morgan does not 

 attribute any direct share in this formation to the ciliated bands ; but 

 his description is most significant and suggestive. It is possible that 

 in Tornarla, as in Auricularia, the ciliated ridges are secondary con- 

 centrations of primitively broader ciliated bands, and that Morgan's 

 »collar-folds« are the ontogenetic expression of these hypothetical 

 tracts. 



Plymouth, Febr. 2nd 1894. 



6. Cambarids from Florida, a new blind species. 



By Dr. Einar Lönnberg, Upsala. 



eingeg. 14. Februar 1894. 



During my sojourn in Florida 1892 — 93 I had opportunity to col- 

 lect three species of Camharus . Two of them are well known and de- 

 scribed forms: Camharus fallax Hagen and Camharus Alleni Faxon 

 both of which I procured from several difi'erent places. But the third 

 is quite different. It is a blind species from a subterranean water. 

 Digging a well in Orange County a man at a depth of about 30 feet 



