348 DEPARTMENT OF TEE NATAL SERVICE 



8 GEORGE V, A. 1918 



A stronger argument for retaining Ortlwpyxis appears in the fact that Yerrill used 

 Oriliopyxis caliculata in all the references to the species in his paper in 1873, giving 

 a description of the species but not of the genus on page 408, but as he returns to 

 Campamdaria caliculata in IST-i and again in 1879, the argument loses its strength. 

 Nutting has evidently overlooked these references of Verrill's for he says : " I cannot 

 find any author has used the name OrUiopi/xis since 1865." 



The name Eucopella has a different status for when von Lendenfeld introduced 

 it in 1885 he defined the genus and other definitions given since then do not conflict 

 with his definition. Since the genus Orthopyxis had not been previously defined. Bale 

 and Xutting are really substituting a new genus for Eucopella, although retaining all 

 the characteristics of that genus, for although a name is given that had been used pre- 

 viously, they do not know and never can know that Agassiz had any such characteris- 

 tics in mind when he applied the subgeneric name Orthopyxis to his species poterium. 



Genus GONOTHYRyEA. 



GONOTHYR^A GRACILIS (Sars). 



Laomedea gracilis Sars, Beretn. om zool. Reise, etc., 1851, p. 18. 

 Gonothyrcea gracilis Allman^ Ann. and Mag. Nat. Hist., 1864, p. 374. 

 HiNCKS, Br. Hyd. Zooph., 1868, p. 183. 

 Fraser, Hyd. Beaufort, 1912, p. 361. 

 Fraser, Hyd. Nova Scotia, 1913, p. 166. 

 Nutting, Am. Hyd., iii, 1915, p. 70. 

 Distribution. — Canso, Barrington passage, low water (Fraser) ; off High Duck 

 island, between Two and Three islands, off Swallowtail light, 30 to 40 fathoms off 

 Bliss island, off St. Andrews point, off Joe's point, off Dochet island. 



GoNOTi-iYR^A LOVENi (Allman). 

 Laomedea loveni Allman, Ann. and Mag. Nat. Hist., 1859, p. 138. 

 Gonothyrcea loveni Allman^ Ann. and Mag. Nat. Hist., 1864, p. 374. 

 Nutting, Hyd. Woods Hole, 1901, p. 352. 

 Stafford, Fauna Atlantic Coast, 1912, p. 73. 

 Fraser, Hyd. Nova Scotia, 1913, p. 166. 

 Nutting, Am. Hyd., iii, 1915, p. 69. 

 Distribution. — St. Andrews, Gaspe. Malpeque, Seven islands (Stafford); Chedac- 

 bucto bay, 20 fathoms (Fraser) ; Nigger reef, off Joe's point, off Head Harbour 

 island, Cumming's cove, 5 to 40 fathoms. 



Stafford mentions a species of Gonothyrcea which occurs at Malpeque, between the 

 clustered stems of Tubularia : " Its hydrotheca has about 24 long^ narrow, rigid, sharp 

 teeth, separated by broad, rounded spaces below and continuing as thickened lines down 

 the hydrotheca." It is unfortunate that he did not describe this species more fully 

 and give figures of it, since, as far as I am aware, there has been no species of Gono- 

 thyrcea described with hydrothecae like these. Gonothyrcea gracilis (Sars) has hydro- 

 thecse with long, slender, sharp, teeth but each hydrotheca has only 10 to 12 of them. 

 Twenty-four is an unusually large number of teeth to be found on the hydrothecal 

 margin of any hydroid species. The thickened longitudinal lines have not been men- 

 tioned in connection with other species of this genus. 



Genus OBELIA. 

 Obelia articulata (A. Agassiz). 

 (Fig. 1.) 

 Evcope articulata A. Agassiz, N. A. Acalepha?, 3865, p. 89. 



Trophosome. — Largest colonies reaching a height of 7 cm., most of them much 

 less than this; stem usually simple, although in some of the large colonies there is a 



