l88 NUTTING L 1 ? ] 



CLYTIA. 



Trophosome. Stem not regularly branched. Hydrothecae with 

 toothed margins, or with excessively thick walls and with long 

 pedicels. 



Gonosome. Reproduction by means of free medusae. 



CLYTIA CALICULATA (Hincks). 

 (Plate xvu, figs. 1,2.) 



Campanularia caliculata HINCKS, Annals and Mag. Nat. Hist., 2nd ser. , Vol. 

 xi, p. 178, March, 1853. VERRILL, Preliminary check-list of Marine 

 Invertebrates of Atlantic Coast, etc., p. 16, 1879. MARKTANNER-TURN- 

 ERETSCHER, Hydroiden von Ost-Spitzbergen, Zool. Jalirb., Vol. vin, p. 

 406. 1895. CALKINS, Some Hydroids from Puget Sound, Proc. Boston 

 Soc. Nat. Hist., Vol. xxvm, No. 13, p. 351, 1899. 



Some authors, as Levinsen, regard this species as identical with 

 C. integra Macgillivray. The mode of reproduction is so different, 

 however, that the two would go into different genera in the classifica- 

 tion here adopted. 



Distribution, Yakutat, Alaska (Harriman Exped.) ; British Coast 

 (Hincks) ; Spitzbergen (Marktanner-Turneretscher) ; New England 

 Coast (Verrill) ; Puget Sound (Calkins) . 



CLYTIA COMPRESSA (Clark). 

 (Plate xvu, figs. 3, 4.) 



Campanularia compressa CLARK, Proc. Acad. Nat. Sciences, Philadelphia, 



p. 214, 1876. 

 Eucopella Campanularia (VON LENDENFELD)? Uber Coelenteraten der Sudsee, 



iv, Mitth. Zeitsch. Wiss. Zool., xxxvm, p. 497, 1883. 



Distribution. Orca, Alaska (Harriman Exped.) ; Shumagin 

 Islands (Clark). The figures given of this species well illustrate the 

 great variation in thickness of the hydrothecal walls. All the speci- 

 mens thus far discovered were found attached to Laminaria, over 

 which they creep in great profusion. 



Von Lendenfeld makes his Eucopella campanularia the subject of 

 one of his masterly monographic papers and it appears to agree in 

 every particular with the species under discussion. If I am correct in 

 supposing the two species identical, the name Eucopella companularia 

 will become a synonym and a very exceptional distribution will be re- 

 corded for Clytia compressa. It is interesting to note that von 

 Lendenfeld's species was also found growing on Laminaria. 



The present writer does not agree with Calkins in his suggestion 

 that C. compressa is a synonym of C. caliculata. 



