372 Transactions. 



(Esophagus. — The colour is a dull white, with brighter lines at the in- 

 sertions of the mesenteries. Bourne* states that the sulcar and sulcular 

 siphonoglyphs do not differ in size and structure, but in my preparations 

 one siphonoglyph appears much deeper than the other. This is a feature 

 that frequently appears in sectioned anemones, and may be the result of 

 treatment. On the other hand, it may mark the position of the sulcular 

 directives, which, being the first pair of directives, and having less to pull 

 against than the second pair, may draw the stomodfeum unduly towards 

 them. In my sections of L. thompsoni the deeper siphonoglyph is curiovisly 

 folded, being bent on itself some six times almost at right angles. The 

 cilia of this siphonoglyph are strong, and stained distinctly with hsema- 

 toxylin. 



Mesenteries. — There are 30 to 32 pairs, all perfect. Two pairs are di- 

 rectives (Plate XVIII, fig. 1). On all the mesenteries both retractor and 

 parietal muscles are very strong ; indeed, the whole animal is remarkable 

 for its great muscular development. The central fold of the mesenterial 

 trefoil stands well out beyond the lateral folds. 



Gonads. — These appear in the usual place in the mesenteries. In one 

 of the animals sectioned no ovaries appeared, but the body-cavity contained 

 developing ova and embryos from the 2-chambered to the 12-rayed stage. 

 It is interesting to note that one such embryo had 5 chambers. The young 

 develop between the mesenteries until, at any rate, the 12-rayed stage is 

 reached. They then appear to be ready for an independent existence, as 

 I have found none beyond that stage in the body of the parent. 



Dimensions. — A good specimen would be as much as 6-7 cm. in height 

 and 4-5 cm. in breadth ; tentacles, 2-5 cm. 



Locality and Habits. — The species is apparently littoral, being found just 

 above and below low-water mark, attached to the rocks and to loose stones. 

 It is apparently fairly well distributed on the coast of New Zealand, but 

 is not very numerous in any locality. It is more plentiful at Plimmerton 

 than at any other place so far as I know. It has been found at most places 

 along the coast between Plimmerton and Wellington. Professor Coughtrey's 

 specimens were found in Otago Harbour. 



Sagartia albocincta. 



This anemone was first described by Professor Huttonf as Gregoria 

 albocincta. Gregoria was one of Gosse's genera of the family Sagartidce. 

 As it was erected for a single specimen, which Gosse himself thought might 

 have been immature, and as no specimen has since been found, recent workers 

 have agreed in dropping the genus. In reclassifying this animal I ha^'e 

 adopted McMurrich's definition of Sagartia^ : " SagartincB with smooth 

 column destitute of verrucas, and with, no special arrangement of the cin- 

 clides ; margin tentaculate ; tentacles concealed in contraction, the sphincter 

 being fairly strong." 



Pedal-disc. — This only slightly exceeds the breadth of the column, and 

 is about equal to the height. It is strongly adherent, and the animal can 

 hardly be removed without damage. The usual histological structures 

 are present. The three layers are all very thin, the mesogloea especially so. 



* ■' Treatise on Zoology," ed. Ray Lankester, pt. ii, Anthozoa, p. 38. 



t Trans. N.Z. Inst., vol. ii, 1878. 



X Pro.^ U.S. Nat. Mus., vol. xvi, p. 176. 



