138 CEYLON PEARL OYSTER REPORT. 



About 5 to 7 marginal bulbs in eacb quadrant; the central, interradial, bulb being 

 much larger than the others. A cluster of cirri adjacent to and on each side of the 

 tentacles. About five marginal sensory vesicles, each with two (occasionally three) 

 otoliths, in each quadrant of the umbrella. 



Size : Umbrella 2 millims. in width and 1^ millims. in height. 



Locality : Cheval Paar, in February. 



Notes. There is only one specimen of this little medusa in the collection. It is 

 rather opaque with a yellowish stain, and its margin is badly curled inwards. The 

 umbrella is somewhat contracted, so that it may not be quite so highly arched as 

 figured. The stomach is contracted back. The mouth is wide open and quadrangular 

 in outline, but has probably four lips when closed. The gonads (male) are very large 

 for the size of the medusa. Each gonad is divided into tAvo by a median longitudinal 

 line. The tentacles have large basal bulbs and transverse bands of nematocysts. The 

 cirri are more or less contracted, and have a small terminal cluster of nematocysts. 

 The cirri are apparently confined to the proximity of the tentacles and none were 

 seen scattered along the margin of the umbrella. 



As there is only one specimen, I place the species provisionally in the genus 

 Mil rocomium. It bears a resemblance to Mitroeomium cirratum in having cirri 

 clustered at the base of each tentacle. According to Haeckel's definition of the 

 genus it should have 8 tentacles and 16 sense-organs. 



Eutima, McCrady, 1858. 



Eutima curva, n. sp. Plate III., figs. 1 to 3. 



Description. Umbrella probably hemispherical, nearly twice as broad as high, 

 moderately thick. Peduncle of the stomach long, quadrangular in transverse section, 

 and with a conical base. Stomach small, about twice as long as broad. Mouth with 

 four small lips, and sinuous margin. Four radial canals. Gonads along nearly the 

 whole length of the peduncle, one on each radial canal, beginning a little way below 

 the conical base of the peduncle and terminating not far from the stomach. Four 

 perradial tentacles, with long tapering cone-shaped basal bulbs, which are laterally 

 compressed and curve over the margin of the umbrella. About 30 to 35 marginal 

 bulbs in each quadrant of the umbrella, and alongside each bulb usually one, 

 occasionally two cirri. Eight adradial marginal sensory vesicles, each with about 

 8 to 10 otoliths, which are arranged in a semicircle. 



Size : Umbrella 10 millims. in width and 6 millims. in height. Peduncle about 

 10 millims. in length. 



Locality : Off Mutwal Island, West Coast of Ceylon, on March 19. 



Notes. The single specimen, although in a good state of preservation, has the 

 umbrella badly compressed and folded, so that it is impossible to figure the whole 

 medusa. It is an adult, as the gonads contain large ova. The basal bulbs of the 



