THE TliANSACTIOKS Of THE LINNEAN SOClETi'. 195 



stalked or sessile, and are median or lateral in position. Lateral 

 feelers occur in Floscularia and Limnias, as well as in Melicerfa, 

 ' and it is tdghly probable that they exist in all the stationary genera." 

 rhese also possess the median feeler of other Botifera, which would 

 appear to be seldom absent. The lateral feelers are symmetrically 

 situated " towards the ventral aspect, and close to the part which 

 ' forms the upper end when the lobes are retracted." In Floscularia 

 fchey are very small, and, as in Limnias, " placed on slight conical 

 slevations." The conspicuously stalked lateral feelers of Melicerta 

 strikingly contrast with the obscure median feeler, " sessile on the 

 back of the head," and homologous with the single stalked feeler of 

 Philodina and Motif er. The median feeler is always ' dorsal,' as is, 

 also, the opening of the cloaca. Thus, when other characters fail, 

 \N<d may determine with accuracy the principal aspects of the body. 

 Dr. Moxon seeks to remove the obscurity, in this regard, which has 

 too often involved the writings of his predecessors. 



Mr. Bastian's paper ' On the Structure and Nature of the Dra- 

 mnculus, or Guinea-vrorm,' is worthy of a more detailed notice than 

 ive can here afford it. "We hope afterwards to present an analysis 

 of it to our readers, when we come to review the same writer's ob- 

 servations on the free Nematoidea, which will appear in the next 

 Part of the ' Transactions.' 



Dr. Baird describes a new species of Ampliinome {A. didymo- 

 hrancliiatct) from Ascension Island and, in a second paper, Cli(stop- 

 lerus insignis from the British seas. Mr. Williams adds a note 

 containing additional particulars on the structure and habits of this 

 gurious Annehd. 



The seven papers on Arthropod animals are as follows : — 



1. Hais^cock and IsTorma^^ — On Splaiichnotrophits. 



2. M'Intosh — On the hairs of Carcinus vicenas. 



3. Lubbock — Notes on Entomostraca. 



4. On the development of Chloebn. 



5. On two aquatic Hymenoptera. 



6. Haliday— On lapyx. 



7. MuERAT — Monograph of the Nitidularics. 



Splanchnoti'ophus, no v. gen., is a parasite of Nudibranchiate 

 Molluscs, and is closely aUied to Cliondr acanthus, but the body is 

 much more distinctly segmented. There are two species, 8. gracilis 

 and *S'. hrevipes. The males of the latter are unknown. Those of 



