130 ACTINLT: of albatross exploration!^ Mf^MURRIOH. 



species, it may be found jKlvaiitu.yeoiis to make a divisioii; at jueseut 

 it does not seem advisable. 



1. Edwardsia intermedia, sp. nov. 



Plate XIX, Fif^s. 1-4. 



No. 704. Station 2783. Lat. 51^02' 30" S. ; long. 74- 08' 30" W. l).'i>tli 122 fathoms. 

 1 specimen. 



The single specimen for wbicli I propose the above name was strongly 

 contracted, the entire capitulum being introverted. In this contracted 

 condition (PI. xix, Fig, 1.) it measured 1.7*'" in lieight, and its greatest 

 diameter is 0,45'"'. 



The physa is rounded and translucent, allowing the mesenteries to 

 show through. The scapns is covered by a thin, brown, chitin-like 

 "epidermis," resembling, apparently, that covering E. Clapuredli^ but 

 unlike it, being almost smooth. It is <iuite translucent and consists of 

 two layers (PI. xix, Fig. 4) ; on the outside is a thin layer of foreign matter 

 (/), consisting of very fine sand particles, spicules, etc., and below this 

 a cuticle like layer (cw) covering tlie ectoderm {ec) and sending here and 

 there into that layer prolongations which seemed occasionally to unite 

 with the mesoglcea. The arrangement is very similar indeed to what I 

 have described for Zoa«i/ijM .s'0(^/a/Mi' ('89), though it is not so certain 

 in this case that the cuticle is really a portion of the mesoglcea. The 

 ectoderm (PI. xix, Fig. 4, ec) consists of cells, not at all columnar, as is 

 usually the case in the Actinozoa, and shows no trace of either gland 

 cells or nematocysts. 



The scapus is marked by eight longitudinal furrows, corresponding 

 to the insertions of the mesenteries, and the intervals between these 

 furrows are occupied by numerous irregularly scattered clear spots, 

 which recall the tubercles described by Andres ('SO) and Danielssen 

 ('00). Their structure is, however, somewhat different from what these 

 authors have described. The ectoderm over a small area is slightly 

 thickened and projects through the covering investment, but no nemato- 

 cysts were to be found in it. The transparent appearance which is so 

 characteristic of the tubercles is due to a comparatively large oval cavity 

 in the mesoghea, lying below the tubercle and always separated, 

 api)arently, by a very delicate layer from the ectoderm, though a small 

 collection of granules and, in some cases, a few cells are to be found in 

 the cavity. (PI. xix, Fig. 4). 



In transverse sections it is seeu that a i)ortion of the scapus is intro- 

 verted as well as the entire capitulum ; sections taken at a little more 

 than 3""" from the up])er extremity of the contracted animal show the 

 cuticular investment which is characteristic of the scai)us. In this in- 

 troverted region, lioMever,the layer of foreign material (PI. xix, Fig.2,/) 

 is very much thicker thau on the outer surface of the body, and, further- 

 more, in each interval between the insertions of two mesenteries a 



