i6 



HYDROIDA II 



Gen. Grammaria (Stimpson). 



Colonies creeping or forming upright, irregularly branched rhizocaulomes with sessile, cylin- 

 drical hydrothecte, which are to a varying extent fused with the tubes, so that in this part it is im- 

 possible to distinguish between the wall of the hydrotheca and tube. The hydrotheca; can at times 

 exhibit a basal constriction forming a boundary between them and the mother tube, but such con- 

 striction may also often be wanting. Diaphragm and operculum lacking. 



In earlier works, the creeping species have been incorrectly noted as a separate genus, Filellmn. 

 The type of this genus was Fikllum serpens (Hassall). I have previously (1912 p. 10) pointed out 

 that this species should be classed under Grammaria, and ^m supported here by Kramp (1914 p. 

 1030). Further proof is afforded by Stechow, who describes (1913 p. 118) a species Grammaria 

 scandens, with both creeping and upright colonies; it would seem doubtful whether this species should 

 properly be maintained beside Grammaria abietina, which may often be found in Throndhjem Fjord 

 in the same manner. Stechow (1. c. p. 121) considers, however, that tlie genera should be maintained, 

 "da ihre Beibehaltung cine grosse Bequemlichkeit fiir die Bestimmung ist". 



Grammaria serpens (Hassall) Broch. 

 1848 Campanularia serpens, Hassall, Catalogue of Irish Zoophytes, p. 2223. 

 1868 Filellum serpens, Hincks, A History of the British Hydroid Zoophytes, p. 150. 

 1912 Grammaria serpens, Broch, Hydroida from the "Michael Sars", p. 10. 



Colonies creeping. Hydrotheca; cylindrical, bent to an angle, the basal part fused with the 

 stolon. The hydrotheca is tubular, quite cylindrical, or with slightly outward curving opening margin; 

 the transition to the stolon is as a rule marked by a slight constriction. 



The gonothecse are collected in close coppiniae, with highly curved tubes. They are herma- 

 phroditic, with the male gonothecte wedged in between the female. 



Material : 



"Ingolf St. 87 65^02,3' N., 22°56,2' W., depth 110 fathoms 



"Thor" 64°i6' N., 22°I7' W., — 50 metres 



- 64°o2' N., 22°33' W., - 34 - 



— 63=30' N., 20° 1 4' W., — 80 — 

 Greenland: Egedesminde (without further details) 



Store Hellefiskebanke ( — — . — ) 



Davis Strait ( — — — ) 



Iceland: Vadlevik, depth 80 fathoms 



33 miles SK. of Stokkesnses near Hornvig — 84 — 

 9V2 — S. by W. V2 W. of Ingolfshofdi, depth not given 

 The Faroe Islands: 8 — 10 miles N. of the Faroe Lslands (without further details) 

 7 miles N. by E. of Myggenais point, depth 57 fathoms 



