5 



Report on the Polyzoa of the Belgian Antarctic Expedition, Waters l ) states that he has found 

 a Loxosoma (undetermined) among material from Lizard Island, Oueensland; and the same 

 author -) has more recently recorded L. kcfersteinii from the Sudanese Red Sea. I have myself 

 found a species (probably new) of Loxosomatidae, in the Collection of the British Museum 

 (86. 6. 8. 3.), growing abundantly on Ainathia wilsoni Kirkpatrick, from Port Phillip, Victoria. 

 I am not convinced that Calman's record 3 ) of Loxosoma'*. on a Crab [Xanthias haswelli) from 

 Christmas Island, Indian Ocean, really refers to this genus. 



The discrimination of the species of Loxosoma is often very difficult in the absence of 

 living specimens, or at least of specimens which have not been killed with special care. The 

 number of the tentacles is a character of importance in clistinguishing the species from one 

 another ; and unless the animals have been killed in an extended condition it cannot always be 

 ascertained with certainty. I am aware of the fact that my descriptions leave much to be desired. 



The following is a list of the species of Loxosomatidae which I have distinguished in 

 the present Report; with the approximate number of their tentacles and the average length of 

 fully adult specimens. It must, however, be remembered that the state of preservation is not 

 good enough to allow me to speak with certainty as to the number of tentacles in some cases; 

 so that a margin of error must be allowed for in the third column. The total lenaths oiven 

 (calyx -j- stalk) are at most an indication of the relative sizes. It may be presumed that in most, 

 if not all, cases the length of the living animal, with fully extended stalk, materially exceeds 

 these measurements. 



SPECIES. 



"HOST' 



Approximate 



number 

 of tentacles 



Total length, 



Loxocalyx 

 Loxocalyx 

 Loxosoma 

 Loxosoma 

 Loxosoma 

 Loxosoma 

 Loxosoma 

 Loxosoma 

 Loxosoma 

 Loxosoma 

 Loxosoma 

 Loxoscma 

 Loxosoma 

 Loxosoma 



lineatus 11. sp. 

 leptoclini Harmer 

 lanchesteri n. sp. 

 sluiteri n. sp. 

 annulatum n. sp. 

 velatum n. sp. 

 cirriferum n. sp. 

 circulare 11. sp. 

 pusillum n. sp. 

 trogtodytes 11. sp. 

 breve n. sp. 

 subsessile 11. sp. 

 loricatum n. sp. 

 cocciformc n. sp. 



Halicliondria. 



Cephalodiscus sibogae Harmer 



Pliascolosoma pellucidum var. 



Pliascolwn convestitus Sluit. 



Retepora, Sclüzoporclla. 



Retepora. 



Retepora. 



Retepora. 



Retepora. 



Lepralia celleporoides Busk. 



Schizoporella, Ccllepora. 



Conescliarellina. 



Ca n da. 



Siphonicytara. 



5* 



In a recent work Mortensen 4 ) has proposed the division of Loxosoma into three genera, 

 which he characterises as follows : 



Waters, A. W., 1904, p. 100. 



2) Ibid., 1910, p. 252. 



3) Calman. W. T., 191 1, Ann. Mag. Nat. Hist. (8) VIII, p. 550. 



4) Mortessex, Th., 191 1, "A new Species of Entoprocta, Loxosomelta antedoms", Danmark-Exspeditionen til Grcnlands Noid- 

 Ostkyst 1906 — 1908, Bind V, Xr 8, Kobenhavn. 



