180 Afi'scella n eo us . 



We have only observed a single sac of ova 1)elonging to this species 

 and that was in bad condition, so that we are nnable to say an\thing 

 as to its embryogeny. It is prol)able, however, that the embryos 

 greatly resemble the progenetic males of which we have just spoken. 



The co-existence of Po'/.ascoa Chevreuxi and Po(hisci>n DeUaiudlei 

 with the ChoniostomatidiB mentioned in this note, upon species of 

 the same genus Ampelisca, once more raises the problem, to which we 

 have already drawn attention, of a possible ethological relation 

 between the two groups of parasites, Epicaridse and Choniostoraatidie. 

 From what we know of the habits of Choniostoma and Aspidipcia 

 we are inclined to tliink that the Epicaridne open the way at the 

 present time, or in certain cases perhaps have opened it plvjlogeneti- 

 callif, to the Choniostoraatidie. But this is a point that demands 

 fresh investigations conducted as far as possible upon the living 

 animals. — Compies Rendus, t. cxvii. no. 23 (September 25, 189'i), 

 pp. 446-4-1!'. 



Whojirst found Balanoglossus ? By the Rev. Canon 

 NoKMAN, M.A., D.C.L., F.R.8., &c. 



By a curious coincidence two works have reached me to-day. The 

 first of these is a new volume of the ' Fauna und Flora des Golfes 

 von Xeapel,' a magnificent monograph by Dr. D. "\V. Speugel upon 

 the Enteropneusta (Hemichorda, which includes B(dano(/Iosst(S and 

 allies). The second is ' Atlante di Figure sceverate dalle tavole incise 

 e da disegui original! illustranti di Memorie postume di F. Cavolini 

 pubblicate per cura ed a spese di S. D. Chiaje ' ; I have only been 

 able to procure the plates of this work. From Carus and Engel- 

 mann's Bibl. Zool. p. 121, 1 find that there should be 344 pages and 

 that the date is 1853. This work is by " Fil. Cavolini," the Italian 

 naturalist who wrote at the end of the last century. The plates seem 

 to be of the character of that period, and the last is apparently intended 

 to illustrate a paper on the great eruption of Vesuvius which o^er- 

 whelmed the houses of the 1U,U00 inhabitants of the town of Torre 

 del Greco in 17U4. If these plates date from the end of the last or 

 from the beginning of the present century, then Cavolini was the 

 first to notice and figure, and, perhaps, describe, the genus Dalano- 

 qlossus. On pi. xiv. fig. 4 will be found a very good illustration of 

 a form which seems most closely to resemble B. Kowalevsl'ii, among 

 those figured by Speugel. Spengel makes no allusion to Cavolini's 

 work in his Bibliography, and gives Eschscholtz as the earliest dis- 

 coverer of a species of the group {Pti/codera Jlava, 1^25). Esch- 

 scholtz's figure is a very inferior one to that of Cavolini. 



Probably there is a copy of Cavolini's work in the Brit. ilus. or 

 other library. Will some one clear this matter up ? The plates, 

 moreover, in Cavolini appear, from their different sizes and the 

 double numbers on them, to have illustrated ]>reviously published 

 papers, hero brought together ; but I cannot find any such papers 

 reterred to in Bibl. Zool. 



Bminiioor KoiUiiv. 

 Dec. 10, 18it.-J. 



