84 BULLETIN OF THE 
Tamoya punctata sp. nov. 
Figs. 4-6. 
A sniall Tamoya, different from any species of this genus which has yet been 
ena was found several times at the Bermudas. It is probably the young 
of a species of the genus Tamoya, although it has differences from the known 
species of the genus which may later, when more is known of the develop- 
ment of \Tamoya, call for its separation. The absence of enlargements of 
the bases of the tentacles into “ wings” separates it from the adult Tamoya. 
The youngest larva (fig. 4) has the following characters. In many respects it 
resembles Procharugma Haeck., from which it however differs in the possession 
of a well-marked “ velarium”’ and clusters of cells upon the external surface of 
the bell. 
The bell of this larva has very rigid walls, as that of related Trachynemide. 
The bell walls are colorless, and without radiating chymiferous tubes. The 
height of the bell is a little more than its diameter. Its external surface bears 
parallel circles of cells, each composed of several small clusters, and arranged 
as shown in the figures. Instead of radial chymiferous tubes, we find four ra- 
dial muscles, which extend along the inner bell walls from a point just below 
the apex of the bell to the marginal sense-bodies. 
The proboscis is at first a bag-like fold hanging downward in the bell cavity, 
and slightly separated from its upper inner walls. It is a little more opaque 
than the adjacent bell walls, and has a reddish or brownish color. There are 
four short, stiff tentacles springing from the bell margin. Each is carried pro- 
jecting outward, and is ribbed on its outer walls with rings of lasso-cells. The 
tentacles have a reddish color at their extremities. 
The sense-bodies are four in number, and are set in deep incisions in the bell 
margin, midway between the points of origin of the tentacles. Each sense-body 
is covered externally by a well-developed “hood” (h), which is visible even 
in the youngest specimens. A radial muscular band passes from the base of 
each sense-body to the stomach, along the inner bell walls. A similar band 
also makes its way directly from the point of origin of the style of the sense- 
body into the “velarium.” These last-mentioned muscles end blindly near 
the inner rim of this structure. Each marginal sense-body has the form of a 
spheroidal sac mounted on a short peduncle. This sac (otocyst) contains a 
solid spherical body, which occupies most of the chamber of the otocyst op- 
posite that into which the cavity of the style opens. The otolyth is nearly 
transparent and colorless. There is a pair of ocelli situated in the lateral walls 
on the sides of each otocyst. 
The “velarium” is thick, muscular, and propulsion is brought about by 
its strokes on the water combined with movements of the bell walls. 
A second, somewhat older larva of 7. punctata was also found. It differs 
primarily from that just described in the greater length of the tentacles, and in 
the modification in the shape of that part of the apex of the bell from which 
the proboscis hangs. While the proboscis of the youngest Tamoya springs 
