Rev. T. Hincks on new Australian Hydrozoa. 279 



physiologically, will be endowed with a delicate sense of touch : 

 one might even say that, like the tip of a finger, it forms a sort 

 of organ of touch/' 



The Lion is not the only animal that possesses a '' spine " in 

 the extremity of his tail. The Puma also has one ; but it has 

 not been found in any other Cat. 



The Aurochs {Bos urus) has a papilla, of the size and form of 

 half a pea, in the midst of its enormous caudal tuft ; in other 

 Ruminants nothing of the kind has been found. In Macropus 

 unguifer, Gould found, at the extreme tip of the tail, a broad, 

 flat, blackish nail, closely resembling that of the human finger : 

 Macropus frcenatus had only traces of something similar. The 

 " spine " has also been found in the tails of various long-haired 

 Monkeys — sometimes small, sometimes very large, and of a horny 

 nature. Its form is three-sided, with the highest (somewhat 

 arched) edge turned upwards, and the largest face downwards ; 

 it projects completely from the skin. The mass is hard, the 

 angle worn away, but distinctly marked, and scaly like the tail 

 of the Beaver. The Monkeys in which this structure was ob- 

 served are Setnnopithecus me/alophus (in which the nail almost 

 projects beyond the hairs), S. nasalis, S. pyrrhus, Colobus Tem- 

 minckii, and C Guereza (the latter with the smallest nail). The 

 observations on the occurrence of this appendage in the Monkeys, 

 the Puma, and the Aurochs are contained in an anonymous 

 work published in 1855 at Darmstadt, and entitled ' Der Stachel 

 des Lowen an dessen Schweifende. Nach genauer Untersuchung 

 unter wortlicher Beifiigung alterer und neuerer Angaben, mit 

 naturgetreuen Abbildungen und einem Anhange neuerer Ent- 

 deckungen.' 



XXXIII. — On neiv Australian Hydrozoa. 

 By the Rev. Thomas Hincks, B.A. 



[Plates XII. & XIII.] 



I AM indebted to the kindness of my friend George Norman, Esq., 

 of Hull, for a parcel of sea- weed, collected in the neighbourhood 

 of Melbourne and Geelong, which has yielded many species of 

 Hydrozoa and Polyzoa. Several of these are new, and con- 

 stitute an interesting addition to the Invertebrate fauna of 

 Australia. I propose at present to describe two forms belong- 

 ing to the order Sertularidse — one of them a member of the 

 well-known genus Campanularia, the other representing a new 

 generic type. 



