Mr. J. W. Fcwkcs on Angelopsis. 147 



the poly))ites, sexual bells, and possibly tentacles. It is also 

 remarkable in possessing bud-like structures on the lower part 

 of the float, near its junction with the base. These bag-like 

 bodies recall in general appearance the form of the float itself, 

 and somewhat resemble structures to which Ilaickel has given 

 a special name (aurophore) in certain related genera. 



My original description of this strange Siphonophore was 

 necessarily a short one, and for reasons beyond my control at 

 that time the figures which were given of it were somewhat 

 imperfect. Since the publication of the first notice of Ange- 

 lopsis I have reexamined my types and have been able to 

 make a dissection of tlie larger of them, from which study it 

 is possible for me to add something to my first description, 

 which, although superficial, is accurate as far as it goes. The 

 present paper has in part been called forth* by Prof. Hseckel's 

 report on the ' Challenger ' Siphonophora, which contains 

 descriptions of allied genera, the account of the anatomy of 

 which throws considerable light on the interpretation of certain 

 structures in Angelopsis the function of which was not wholly 

 plain four years ago. 



Among the interesting Siphonophora described or figured 

 in the ' Challenger ' Eeport already quoted are four new 

 genera which difler from other known Siphonophora in very 

 important particulars. Ha3ckel has found it necessary to 

 form a new group for tlie reception of these genera, and assigns 

 to it the name of Auronectse. In this group he includes doubt- 

 fully my ^?^_9'e/ojos?5, and regards it as possibly the same as 

 his genus Auralia. Although Angelopsis seems to be allied 

 to A^iralia, there are certain marked differences so far as 

 I can make out from his meagre and unsatisfactory account 

 of Auralia. Unfortunately Hasckel does not describe or 

 figure his genus in the report f referred to, so that I am 

 ignorant of some of the main characters of his Auralia. The 

 genus Avgelopsis is so different from other Siphonophora that 

 there is a call for a more intimate knowledge of its anatomy. 



* I have delayed my publication of the new facts embodied in this 

 paper in the hope that it mip:]it be possible to collect Angelopsis alive and 

 gather information in regard to its nectocalyces, tentacles, tentacular 

 knobs, and other structures. 



t The editor speaks of this work as a " Monograph of the whole class 

 of Siphonophora." Any report which simply mentions the names of new 

 genera and refers to publications yet to appear for descriptions of these 

 novelties does not come up to the highest standard of what a " Mono- 

 graph " should be. 



Hseckel does not say whether his Auralia was taken by the ' Chal- 

 lenger' or not. The locahty given for it, viz. " depths or the Tropical 

 Atlantic," is also somewhat vague. 



10* 



