ON THE ZOOLOGICAL STATION AT NAPLES. 291 



podial cim, whicli contain peculiar cells, no doubt sensory in function. 

 The supra-oesophageal ganglion, or brain, fills the prostomium and appears 

 to supply the prostomial tentacles and palps (' Fiihlercirren ' of Grube). 

 In addition, I collected the various members of the group which appeared 

 during my stay, and hope to revise Claparade's list of the same ; his 

 P. Ch'uhiana is certainly synonymous with the Lepidonotus clava of Mon- 

 tagu, common on the coast of South Devon, while he entirely omits to 

 mention P. (^Lepidasthemia, Mgu.) elegans, Grube, =F. lampropthalma, 

 Marenzeller. I have found one species which I believe to be new. 



I was anxious to trace the development of some directly developing 

 Medusae — Pelagia, Carmarina, or other ; neither Haeckel, Fol, nor Metsch- 

 nikoff had been able to demonstrate in Carmarina the exact method of 

 formation of the sub-umbral cavity, &c., which I had hoped to do, but did 

 not obtain a single egg ; and while, in the case of Pelagia, I was able to 

 confirm Kowalesky's account of the segmentation, my departure prevented 

 me from carrying the developmental history further than the formation of 

 the four-sided pyramidal gastrula. 



Further, I dissected specimens of the large species o?Aphjsia, common 

 at Naples, with a view of determining the anatomy of the renal organ. 

 The so-called poison-gland of Delia Chiaje, a grape-like organ lying to the 

 right of Spengel's olfactory organ, has nothing to do with it ; the glands 

 which secrete the pigment are scattered follicles, lying in the substance of 

 the free edge of the mantle, and opening on its under surface. The so- 

 called triangular gland and renal organ, which are only two parts of the 

 same organ, lie near the attachment of this flap ; the external aperture of 

 the organ is near the anterior attachment of the gill. The renal epithelium 

 lines a much plicated continuous membrane, and the renal sac communi- 

 cates, as has already been shown to be the case in other gastropods, with 

 the pericardial cavity. 



And lastly, at the request of Professor E. Ray Lankester, I have 

 verified his observations on the development of autoplasts in the egg of 

 Loligo, the existence of which has lately been denied by Ussow. 



III. Report on the Occupation of the Tahle hy Mr. Franh E. Beddard. 



I occupied the British Association table from April 24 to June 9. 

 Besides endeavouring to obtain a general acquaintance with the fauna of 

 the coast, I devoted myself to a study of the histology of the Pedicellariae 

 of certain echinoderms, in continuation of an investigation recently 

 published in the ' Transactions of the Royal Society of Edinburgh.' 

 Although, unfortunately, my work was much interfered with by indis- 

 position, which even obliged me to leave Naples for Ischia for a short 

 time, I was able to collect a considerable amount of material ; and hope 

 to complete and publish my observations during the coming winter. 



I wish to return my most sincere thanks to the Committee for their 

 kindness in allowing me to use the table. 



U2 



