THE CAMPANULAEID^ AND THE BONNEVIELLID^. 23 



For instance, Mayer includes under his family "Eucopidse" the genera EucopeUa, Cam- 

 panulina, Ohelia, Clytia, and Phortis. Some of these (e. g., Ohelia and Clytia) would come 

 xmder Campanularidse as used in the present work, and others such as Campanulina would 

 find a place under Campanulinidse. Again the medusje which have the trophosome of Campanu- 

 laria are placed by him in four separate genera — Eucope, Mitrocoma, Eirene, and Tima; and 

 still another Campanulina trophosome produces medusae which he puts in an entirely different 

 family, the ^Equoridse {Mq^iorea). 



The following generic names have become more or less intrenched in the literature of the 

 Campanularidse through the writings of recent authorities:' Eucope, Galanthula, Campalaria, 

 Thyroscyphus, Calampliora, Hypanihea, EucopeUa, Halisiplionia, Laomedea, HebeUa, Clytia, Cam- 

 panularia, Ohelia, Ohelaria, Thauma.ntias, Gonothyrka, Silicularia, and Orthopyxis { = Hypanthea) . 

 From the above list the following genera should, in the opinion of the writer, be dropped 

 or referred to other families : 



Eucope. — According to Mayer,^ this genus of medusse, dating from 1856, is produced from 

 a Campanularia trophosome. The hydroid species by A. Agassiz should go into the genus 

 Ohelia. 



Galanthula. — The diagnosis of the genus Galanthula of Hartlaub is as follows : ^ 

 Hydrorhiza kletternd, Hydranthen unverzweigt mil langlich eiformigen, scharf abgesetzen Hydrotheken, Hydro- 

 theken ohne Basalraiim und ohne Rundversetzung am Diaphragma. 



The character of the manubrium is not indicated ui the drawings and the absence of the 

 diaphi'agni is sufficient to exclude this genus from the family Campanularidse as here used. 

 This character is usually correlated with a conical hypostome and thus it is likely that we will 

 fuid a further reason for excluding Galanthula from the CampanularidEe. 



Campalaria. — This genus was established by Hartlaub* to accommodate a species which 

 differs from Campanularia m having but one gonophore in a gonangium (instead of several) 

 and in having the ova pass through their development outside of the gonangium. This genus 

 is not found in American waters and need not be discussed here. The writer considers it of 

 doubtful validity. 



Thyroscyp'hus. — This genus has been referred to the C-ampanidinidfe by Levinsen'^ and 

 Hartlaub." Two species collected by the Bureau of Fisheries Steamer Alhatross in the North 

 Pacific which have been examined by me, serve to convince me that Thyroscyphus is closely 

 allied to SertulareUa. I would therefore refer the genus Thyroscyphus to the Sertularidse. 



Calamphora. — This genus, established by Allman in 1888,' undoubtedly has its closest 

 affinities with SertulareUa and should certainly be included m the Sertularidse. The writer 

 has a sketch of a specimen from the North Pacific, the basal part of which agrees with Allman's 

 description of Calamphora, and the distal part is a true SeHulareUa. 



Hypanthea. — Another genus described by Allman is characterized as follows : ' 



Trophosome. — Hydrothecae borne eacH on the summit of a cylindrical peduncle, which springs from a creeping 

 stolon, inoperculate, with the cavity so reduced by the great thickness of its chitinous walls as to. be incapable of 

 receiving the hydranth in refraction. Gonosome. — Gonophores in the form of simple sporosacs developed within 

 chitinous gonangia, which spring, aggregated or scattered, from the creeping stolon. 



Hartlaub ^ claims that Hypanthea is practically a SAOionym for Silicularia, Mayer, 1834, 

 at least in part, and the present writer accepts his conclusion as apparently well grounded. 



' Species formerly placed in the Campanularidse, but now relegated to other families, e. g., Gampanulinidse and 

 Lafoeidae, are not included in this list. 



2 Medusas of the World, vol. 1, 1910, p. 10. 



^ Beitrage ziu: Fauna der sildostlichen und ostlichen Nordsee, vol. 3, pt. 6, Hydi-oideu, 1898, p. 110, Wissenschaft- 

 liche Meeresuntersuchungen, new ser., vol. ,3, 1898. 



* Die Hydromedusen Helgolands, 1897, p. 495. 



* Meduser, Ctenophorer og Hydroider fra Gronlands Vestkyst, 1893, p. 34. 



^ Die Hydroiden der magalhaensischen Region und chilenischen Kilste, 1895, p. 588. 

 ' Challenger Reports, Ilydroida, pt. 2, 1888, p. 28, and pi. ]0. 



* Idem, p. 25. 



* Die Hydroiden der magalhaensischen Region und chilenischen Kuste, 1895, p. 553. 



