1G4 ACTINLE OK AL15ATK0.SS EXPLORATIONS Aff^MUKKlCH. 



occuiriiig in tlie tentacles at abont the middle of tliat layei'. (1*1. xxiii, 

 Fig. 38.) 



The stoniatodienm is thrown into strong folds, borne on rather stent 

 loiigitndinal elevaHoiis of the niesoghea. The siphonoglyijhes are 

 deep with smooth walls, and the ectodermal cells lining them have the 

 pigment (routined to their onter ends and not scattered throngh their 

 entire thickness as happens elsewhere and on the stomat<»da'nm. 



The mesenteries are thirty-two in number, sixteen being perfect and 

 sixteen imperfect. The longitudinal muscles are fairly well developed 

 (PI. xxiii, Fig. 39), covering the greater portion of the surlVice of the 

 perfect mesenteries; the parieto-basilar is not, however, particularly 

 strong. Only the imperfect nu^senteries are gonoi)horic, and the repro- 

 ductive organs are very conspicuous on account of their bright orange 

 color due to the presence of large oil globules in the ova and s[)erma- 

 tozoa mother cells. The mesenterial tilaments are, like the disc, of a 

 deei> wine color, the general endoderm being colorless. 



In its coloration, so far as this can be determined, this form comes 

 close to Faraciis ri(hns ol)tained by the Wflkes Exploiing l^.xj^edition 

 at Val[>araiso. The very different habitat of the Albafro.s.s Ibrm, which 

 is an inhabitant of deep water and theuncertainty of an indentitication 

 of an alcoholic specimen with a form described as s<'en living and with- 

 out any characteristic anatomical leatures, has induced me to consider 

 for the present the Albatross form as distinct. 



CJoiiiis ANTHOLOBA, llcitwig. 



Paractidse with a large number of short tentacles coveiing the greater 

 portion of thedisc; margin of the disc lobed as in Metridimn. Sphincter 

 strong, prolonged a long distance down the wall. 



llertwig ('82) established this geiuis for a form previonsly referred 

 to the genus Metndium, and which bears strong resemblance to the 

 forms properly belonging to that grou}), at least in so far as the margin 

 and the tentacles are concerned. On the other hand, llertwig has 

 shown that in this case the external similarity is accompanied by such 

 differences in internal organization that the establishment of a new 

 genus and the reference of this to the family Paractidte is necessary. 



15. Antholoba reticulata, (Daiwi ) licit. 



Syiionyiiis. — Actinia redcnlala. — Dana V. S. Expl. Kxi»e(l., 1846. 



Metridimn reticulatum. — Milne-Edwards, ISoT. Verrill, 1868. 



Actinoloha reticulata. — (tossg, 1860. .Intholoha reticulata. — K.Hcrtwig, 1882. 

 No.s. 737, 738. Station: Port Otway, Pataf^ouia. Littoral. Two .specimens. 

 No. 789. Station: Lota, Cliilc. Littoral. One specimen. 

 No. 740. Station: Charles Island, (!nlai)agos Arcliipela<>(). I>itl<>ral. One.specimen. 



I have very littli' to add to the description Hertwig has given of this 

 form. I do not tind, however, that the margin of the disc is "swollen 

 like a pad," but on the contrary the uppermost portion of the column 



