74 BULLETIN OF THE 



It is, of course, impossible to determine whether this belongs in the genus 

 Obelia or in Campanularia, without knowing its manner of reproduction ; and 

 it is from its general similarity to some of the Obelias, lonyissima and especially 

 gelatinosa, that I place it provisionally here. 



LAFOEID.^. 

 Lafoea convallaria, AUman. 



There is a single specimen of this beautiful hydroid. It agrees with Allman's 

 description very perfectly; the only noticeable point being that one of the 

 lower pinnae bears a branchlet. 



Locality. Station 3384. About 100 miles south of the city of Panama. 

 Bathymetrical record, 458 fathoms. 



Lictorella geniculata, sp. nov. 



Plate III. Figs. 14 to 16. 



The specific name has allusion to the knee-like structure at the base of the 

 hydrotheca pedicel. Plate III. Figs. 14, 15, 16. 



Trophosome. The stem is perisiphonic, much and irregularly branched, 

 forming a spreading colonj-, with the width usually greater than the height. 

 The branches, with the exception of most of the smallest, are perisiphonic in 

 most of their length, are short and stout, and are mainly in one plane. The 

 hydrothecEe are borne on the stem and branches, and one is found springing 

 from the axil of every smaller liranch and from many of the larger ones ; they 

 are somewhat tubular or deep bell-shaped, tapering at the base and with an 

 even everted rim, the amount of eversiou in some being very slight. A delicate 

 ring represents the floor, and they are supported on simple, tubular pedicels 

 which unite with a process from the stem or branch by an uneven knee-like 

 joint ; the pedicels are from one third to one half the length of the hydrotheca?. 



Gonosome not present. 



This has a very rigid, angulate habit, which differentiates it in general ap- 

 pearance from the other two members of this genus as yet described, Lictorella 

 haleciodes Allman, and Lictorella cyathifera Allman. It is more like the former 

 species, but is different in the pedicels of the hydrotheca), and in the uniforndy 

 pinnate arrangement of the branchlets. Occasionally in geniculata the smallest 

 branches are partly perisiphonic. 



Locality. Station 3384. Bathymetrical record, 458 fathoms. 



Halecium gracile, Bale. 



Numerous specimens of this delicate Halecium, on one of which was a single 

 gonangium, were taken at Station 3368, between thirty and forty miles off the 

 west coast of Nicaragua. Bathymetrical record, 66 fathoms. 



