170 MESSRS. L. MUEBACH AND C. SHEARER ON [JlUie 16, 



distance of about two-thirds the length of the bell-cavity. The 

 proboscis is long, and the mouth a plain circular opening. The 

 radial canals run from the tubular end of the stomach slightly 

 upwards and then downwards to the circular canal of the bell- 

 margin. Their course is marked by refractive granules which 

 look like nematocysts, but which are not regularly arranged. No 

 gonads were seen ; it is probable the single example obtained was 

 immature. 



Colour. — Organs pale blue. 



Habitat. — Victoria Harbour, collected by Shearer. 



Discussion. — Some doubts as to the accuracy of the above 

 identification ai-e raised by several of the characters, the most 

 striking being the tentacle-bulbs. Only one individual was 

 obtained and that had been badly preserved. 



II. T I A R I D jE Haeckel. 



TuRRis Lesson. 



1. TuRRis BREvicoNis, sp. nov. (Plate XYIII. figs. 1 & 2.) 



Specific description. — The bell is 4*5 cm. high by 3*5 cm. broad 

 at the level of the velum. It is somewhat cubical and quite 

 massive in appearance. The general shape of the bell corresponds 

 with Haeckel's (18) figure of Tiara pileata (pi. 3. fig. 7). The 

 velum is well developed and strong. On some parts of the bell- 

 margin thei'e appears to be but one row of tentacles ; for the 

 greater part, however, there are two rows, arranged in a zigzag 

 manner. The tentacles are numerous, over a hundred and forty 

 in all. They seem quite uniform in size when mature ; the smaller 

 ones are more irregular and evidently less developed. They are 

 coiled and show the structure peculiar to coiled tentacles, as do those 

 of Physalia, the ectoderm being very much enlarged on one side, 

 while the contractile fibres of the inner side are covered with but 

 a thin layer. There are no special tentacle-bulbs, but the tentacles 

 spi-ead out, clasping the bell-margin, as Haeckel (18) has described 

 for Tiara pileata. In the preserved condition no eye-spots could 

 be made out. 



The walls of the stomach are very much folded, and pushed out 

 into pouches on either side of the radial canals, forming dependent 

 diverticula from the angles of the stomach. There are four or 

 five pairs of these diverticula. They bear the gonads, and are 

 suspended to the radial canal by a double band or mesentery 

 {of. Haeckel, 18). The proboscis is poorly developed. 



The four rather large mouth-lobes are peri'adial in position, 

 scalloped, and finely fringed. 



The gonads and stomach occupy less than the upper half of the 

 bell-cavity. The radial canals are spindle-shaped in outline, 

 Haeckel's " lanzettformig." Throughout theii" length they have 



