248 ' ENDEAVOUR " SCIENTIFIC RESULTS. 



Cryptolaria exserta was described by Busk in one of the 

 series of papers entitled " Zoophytology " which were pub- 

 lished in the " Quarterly Journal of Microscopical Science " dur- 

 ing his co -editorship. J. Y. Johnson, whose name has been 

 commonly, but erroneously, appended to the species, had no 

 connection with it beyond sending the specimens from 

 Madeira to Mr. Busk. 



Ritchie, after examining " Challenger ' ; specimens of 

 P. filicula, Allman, is satisfied of their identity with P. exserta, 

 but dissents from the suggestion of Pictet and Bedot that 

 P. pectinata, Allman, is not distinct from P. filicula. Ritchie 

 enumerates a number of discrepancies between the" Challen- 

 ger " specimens and Allman's description and figure, and 

 in each instance the present specimens confirm Ritchie's 

 account. 



To the previous descriptions I may add, with regard to the 

 ramification, that the pinnae, which to the naked eye appear 

 opposite, do not originate at precisely the same level, but one 

 is higher than the other by the length of a hydro theca. Some- 

 times a secondary pinna springs from a primary one close to 

 its origin. 



The gonosome has not been observed hitherto, unless, as 

 Ritchie thinks probable, Pictet and Bedot's P. pectinata is 

 really to be referred to the present species. Coppiniae were 

 present on one or two of our specimens, extending to over half 

 an inch in length. The cells are sharply polygonal, except 

 the short distal portion, which projects in the form of a small 

 rounded dome ; the aperture is small and circular, and one 

 side of the rim is produced into a conical horn. From among 

 the cells spring many crooked slender filaments, each support- 

 ing a few distant sarcothecae. 



Locs. Oyster Bay, Tasmania, 60 fathoms. 



Great Australian Bight, Long. 130 40' E., 160 fathoms. 



Thirty-five miles south east of Bruni Island, Tasmania, 

 150-230 fathoms. 



Genus CRYPTOLARIA, Busk. 



CRYPTOLARIA ARBORIFORMIS, Ritchie. 



Cryptolaria arboriformis, Ritchie, Mem. Austr. Mus., iv., 16, 

 1911, p. 824, pi. Ixxxiv., fig. 1, pi. Ixxxvii., fig. 7. Id., 

 Briggs, Rec. Austr. Mus., x., 10, 1914, p. 289. 



Specimens of this hydroid were obtained which fully agreed 

 with Ritchie's account in regard to the weather-beaten aspect 



