V14 Zoological Collections^ Invertebrata. 



slipper with a forked heel. The fifth, named Enneagoniay has the anterior 

 animal smaller than the other, of a nearly globular form, its orifice surrounded 

 by nine little points : the posterior is also globular, but larger. In the last, 

 which is named Ciiboidea, the anterior animal is very small, and almost 

 cylindrical ; and the posterior much larger and cubical. 



This genus of zoophytes belongs to the same family as the Physalue and 

 BhizophorcE ,- but it presents peculiar physiological difficulties. Why is this 

 constant union of two individuals only, and of two different forms ? Is it 

 sexual ? or are these only parts of the same animal, whose organic connexion 

 has been overlooked on account of its extreme delicacy ? Future observations 

 will some day solve these problems. 



M. Bory St Vincent on the Psychodiairia. — In our analysis for 1822, 

 we gave an abstract of the views of M. Bory St Vincent on those 

 microscopic bodies, which, according to his opinion, sometimes resemble 

 vegetables, and at others exhibit the properties, and especially the volun- 

 tary motions of animals ; and, in 1824, we quoted an observation of 

 M. Gaillon, which appeared to have reference to the same order of 

 facts. Since that time M. Bory has gone much farther, and has esta- 

 blished a sort of separate kingdom, which he names Psychodiairia, and 

 which connects certain animal properties with the properties of vegetables. 

 He defines it, vegetating beings, which have, in addition to the properties 

 of the plant, a sense sufficient for the introduction of a certain portion of 

 animality, but not the complete animality which results from intellect, added 

 to instinct. Under this class he comprehends not only the arthrodiecBf upon 

 which his first observations were conducted, but the fresh water polypes, and 

 all vegetables which have a sort of animated inflorescence, more or less 

 resembling the polypi, as the sertulerice, &c. ; or which have a sensible bark 

 or crust, as the gorgonice ; or, lastly, which exhibit what he calls an active 

 matter, as seen by him in his arthrodiece. He divides it into ichnczoairia 

 phytozoairia and lithozoairia. The first are not fixed, the second have a horny 

 or cellular vegetation, the third are stony; and each order is subdivided, 

 according as it has or has not hydras, that is to say, animated expansions 



analogous to the polypi Mem. deVAcad. Roy. des Sciences de I'lnstitut 



de France. Tom. IX. 1830. .J aiia cj ^i^\iL ix, iiCMJi 



. oK^ ^o Lunim; l^rt s»d 1 



Notice of the known species of Nebalia, Leach [In a former ^liilibef of 



this Journal, (Vol. II. p. 73,) a notice was given of the third fasciculus of 

 Thompson's Zoological Researches, in which, as well as in his former parts, 

 though we cannot approve of the unnecessary whine with which the author 

 interlards his descriptions, there is very much new and interesting information, 

 accompanied by useful illustrative figures. We take this opportunity of again 

 alluding to this little work, as we understand the publication of the next 

 fasciculus is delayed, until the names of 150 subscribers be given in to the 

 author. We have ourselves taken the work from the beginning, and shall 

 certainly continue to do so ; and we trust that all those who can appreciate 

 the excellence of these studies, and the disinterested way in which Mr 

 Thompson pursues them, will contribute their mite. Each number, on 

 an average, contains about 30 pages of letter pcess, and 3 or 4 plates, at so 

 low a price as 3s. 6d. The memoirs contained in the first three fasciculi 

 are as follows : — 



1. On the metamorphosis of the Crustacea, and on Zocee, exposing their 

 singular structure, and demonstrating that they are not, as has been 

 supposed, a peculiar genus, but the larva of Crustacea. 



2. On the genus Mysis, or opossum shrimp. 



3. On the luminosity of the ocean, with descriptions of some remarkable 

 species of luminous animals, (PyrosomapignuBa and Sapphirineindicator,) 

 and particularly of the four new genera, Nocticvla, Cynthia, Lucifer, and 

 Podopsis, of the ShizopodcB. 



— Addenda to Memoir I. 



