i6 



6. Loxosoma circulare n. sp. (PI. I, figs 14 — 16). 



Type. 24.15. On Retepora, 24. A. Stat. 53. Bay of Nangamessi, Sumba, o — 16 Metres; coral-sand; 

 near the shore, mud. 

 281. E. On Retepora, 281. D. Stat. 43. Off Pulu Sarassa, Postillon Islands, o — 36 Metres; coral. 

 ? sp. 358. P). On Retepora, 358. A. Stat. 240. Banda anchorage, 9 — 45 Metres; black sand, coral, 

 Lithothamnion. 



Calyx smaller than in the preceding species, usually from 150 to 190 a long and from 

 125 to 150 ij. broad ; nearly circular in the retracted state of the tentacles. Two pairs of tactile 

 appendages, at the margins of the proximal half of the calyx. Tentacles probably 12. Stomach 

 with indications of lateral lobes. Sexes separate ; the females with a single large yolky egg in 

 the ovary and with not more than two embryos in the vestibule (fig. 14). Buds as in L. cir- 

 riferum, provided with a foot-gland. Stalk usually slightly shorter than the calyx, from which 

 it is sharply marked off; from 1 10 to 155 u. in length in the preserved specimens, and 26 — 

 32 ij. broad; terminating in a well marked disc of attachment, without food-gland in the 

 adult state. 



The specific name which I have chosen for this Loxosoma refers to the nearly circular 

 outline of the calyx, when the tentacles are retracted. 



I was at first in considerable doubt whether this form should be regarded as distinct 

 from L. cirriferum. The difference in the female specimens of the two forms seems, however, 

 to justify its separation. Only one egg is produced at a time in each ovary ; and there are 

 accordingly only two embryos simultaneously in the vestibule. Both eggs and embryos are larger 

 than in L. cirriferum, as will be seen by comparison of the figures given of the two species. 

 The possibility is perhaps not excluded that the specimens here described are young forms 

 of L. cirriferum ; and that with increasing size and age the number of the eggs increases 

 and their size diminishes; but I do not think that this view is, a probable one. 



The specimens 358. B. are distinctly larger than the ones of which the measurements 

 are indicated in the diagnosis, their calyx reaching a length of 288 \j. and a breadth of 224 u.. 

 I am not sure that they are rightly referred to the present species. 



7. Loxosoma pusillum n. sp. (PI. I, figs 19, 20). 



Type. 133. G. On Retepora, 133. B. Stat. 164. i°42'.5 S., 130° 47.5 E. 32 Metres; sand, small stones 



and shells. 

 133. C. On Retepora, 133. B. Stat. 164. Ibid. 

 193. H. On Retepora, 193. C. 2 , C. 3 . Stat. 274. 5°28'.2S., I34°53'.9E. 57 Metres; sand and 



shells, stones. 

 108. AM. On Retepora, 108. B. 2 Stat. 144. North of Salomakiëe (Damar) Island, 45 Metres; 



coral bottom and Lithothamnion. 



Size of individuals small, the calyx commonly not more than 100 [j. long and about 

 75 ij. broad; in larger specimens as much as 147 a long and 128 u. broad; resembling that of 

 L. circulare in general shape; and sharply marked off from the stalk. Cirriform organs minute, 

 one pair being present opposite the proximal half of the stomach. Tentacles 8 — 10, but some- 

 times not more than 6 in young specimens. The thickened epithelium of the stomach extends 



16 



