﻿PROCEEDINGS OF THE 



[April, 1857. 



Remark. — The specimens which I include under this genus 

 were in the notes, taken during my observations, ranked as be- 

 longing to two distinct genera and three species. A considerable 

 proportion of them had the sexual organs disposed in two masses 

 on each radiate tube, one being on the proboscidiform appendage 

 or peduncle, and the other in the disk, as in Thaumantias and 

 Tima proper. Thus each possessed eight sexual glands, two to 

 each of the four tubes. In fact, in one of the species this seemed 

 to be the rule, but I have since ascertained that there are speci- 

 mens in both the following forms, some of which have sexual 

 organs in one of these positions only, others in the other position 

 only. From which I have concluded that there are but two spe- 

 cies, and that the sexual organs in this genus may be double, and 

 that when single they are placed either on the proboscidian or 

 disk-portion of the radiate tubes, and that all these varieties may 

 occur in one and the same species. 



EUTIMA MIRA, nov. spec. 

 PL 11, Fig. 8-9. 



Proboscidiform appendage very long, (equalling in length four 

 or five times the height of the shallow disk,) tapering and slender, 

 the digestive cavity also rather deep, and of greater diameter than 

 the peduncle at its junction. Oral leaflets deep cleft. Tentacula 

 four only, and these tubular to the very end. The marginal cord 

 between these tentacula exhibit a great many nodes, which are 

 the only representatives of the rudiments of other tentacula. The 

 disk is quite narrow transversely, and though shallow when com- 

 pared with the deep-belled Eucope, is deep for the genus, in some 

 specimens especially, presenting almost a quadrate outline, but 

 the usual form is more like that of the figure, the outline being 

 emarginate in its descent from the summit of the disk to its 

 margin. 



EUTIMA VARIABILIS, nov. spec. 

 This is the broadest species found in our waters. It differs very 

 considerably from E. mira, being more like Tima flavilabris, 

 Esch. in general form. The peduncle is not more than one or one 

 and a half times as long as the disk is high. The disk is shallow 

 and broad, the digestive cavity partaking of the same peculiari- 

 ties, the oral leaflets shorter than in the preceding species, the 

 peduncle tapering more rapidly. Tentacula twelve in number; 

 four somewhat longer than the rest, placed one at the extremity 

 of each radiate tube. Between every two tentacula are three 



