148 BULLETIN OF THE 



•vdth a jagged upper edge, as seen in profile. All the tubes infested with 

 parasitic Distonm. The proboscis is large, hanging from a pyramidal eleva- 

 tion in the bell cavity left by four recesses, which are prolongations of the . 

 bell ca^•ity itself, extending into the base of the apical extension of the bell walls. 

 The broad tubes which extend along the proboscis hang from this projection 

 as in a sling, one from each angle. The prolongations of the bell cavity up- 

 ward into the gelatinous substance of the conical apex of the bell leave four 

 thick partitions, which separate the upper bell cavity into four chambers. 

 These chambers can best be understood by a study of the figures (Plate III. 

 figs. 1, 2, 3, 4). The sexual organs were fully developed, and in all the indi- 

 viduals which I captured were female. The ovaries in larger specimens were 

 swollen with ova, and are formed of vertically placed tubes flanked with 

 lateral branches, which, when the ovaries are mature, fill almost the whole 

 upper part of the bell cavity below its division into the four chambers already 

 mentioned. The stomach is quadrate in shape, with mouth simple, and desti- 

 tute of oral tentacles. The proboscis terminates near the veil, and rarely, ex- 

 cept in distorted specimens, extends outside the bell opening. 



There are two kinds of tentacles, the smaller of which probably develop into 

 the larger. The length of these two kinds of tentacles is very disproportionate. 

 The ocelli placed upon their respective bases seem to be arranged in two series, 

 those on the bulbs of the longer tentacles are situated higher up on the bell 

 than those on the smaller. The long tentacles in the oldest specimen, which 

 I have studied, are very flexible, and when retracted are closely coiled together, 

 each one around its respective tentacular bulb. The number of long tentacles 

 is sixteen. In the young specimen of 0. ejnscopalis, Forb., which Forbes 

 figures, there are but eight long tentacles. Four arise from the point of 

 junction of radial and marginal tubes, and three on the bell rim between each 

 pair of the primary tentacles. All sixteen long tentacles have triangular en- 

 largements at their bases, and are joined by one angle of the enlargement to 

 the bell margin, while the adjacent angle is continued into a pointed projection, 

 extending upward for a short distance along the side of the bell, as shown in 

 Plate III. fig. 5. At the very tip of this extension there is a bright crimson 

 pigment spot. There are sixteen of these pigment spots, and together they 

 make the upper series. They are true ocelli, corresponding with the black eye- 

 spots on the tentacular bulbs of S. mirabilis, Ag. 



Between every pair of these larger tentacles, there are three short, finger- 

 like processes, each with a single pigment spot at its base, the color of which is 

 the same as that of the pigment spots of the upper series. The centrally placed 

 of these three short tentacles is the most developed, and the pigment spot which 

 it V)ears is of about the same size, and has the same appearance, as those of the 

 upper series. None of the smaller tentacles send a pointed projection from 

 the tentacular bulb up the side of the bell, as is the ca.se with all the long 

 tentacles. There are forty-eight smaller tentacles. The pigment spots which 

 they carry form the second and inferior series of these organs. The tentacles, 

 both large and small, are hollow, flexible, and with smooth surfaces. Their 



