312 CEYLON PEARL OYSTER REPORT. 



Jasmineira caducibranchiata, a. sp. Plate VII. , figs. 178 and 179. 



Locality : East side of Cheval Paar. 



A small slender worm of nearly even diameter, gently tapering behind, 22 millims. 

 long, 1*5 millims. wide; eight thoracic segments, 36 abdominal segments with anal 

 groove passing obliquely across the first abdominal (9th body-segment) to the right 

 side and on to the dorsal surface. The thoracic segments do not differ macroscopically 

 from the anterior abdominal segments ; there are 8 dorsal capillary fascicles, and 

 7 ventral tori carrying a single row of rostrate uncini with long manubrium 

 (Plate VII., fig. 178). The abdominal uncini are avicular (Plate VII., fig. 179). 

 The buccal segment carries the first capillary fascicle near its hinder border and 

 towards the dorsal side ; the collar is rounded and slightly projecting forwards below, 

 with a median notch or incisura dividing the two low rounded lobes, and a shallow 

 impression on each side of the notch. On the dorsal side the collar stands out at 

 right angles to the body and is then inflected at an acute angle, to be inserted on 

 either side of the anal groove in this region. The gill-radioles are lost, but their 

 carriers are retained and show the scars of about a dozen radioles each. Inside the 

 gill-crown there is a pair of broad, pinkish-white lacinise, and below these there is a 

 group of about six slender tentacular cirri attached to the lower ends of the gill- 

 carriers. 



Family: SEEPULID^E. 



Eupomatus albiceps, Ehrb., Grube Plate VII, figs. 180, 180a, and 181. 

 Grube, ' Monatsber. Berlin. Akad.,' 1869, p. 520 (p. 40 of reprint). 



One specimen inhabiting a quadrilateral tube winding round a tube of Phyllo- 

 chcBtopterus ramosus from Galle. 



The worm only measured 7 millims. in length including the branchiae, and a 

 fraction of a millimetre in diameter. Grube's example was rather larger. The 

 operculum gives the character of the species. In this case there are eight nearly 

 erect, slightly curved virgulse and a laterally compressed ovate lamina dorsalis, the 

 latter being a direct continuation of the columella and bearing a pair of broad dorso- 

 lateral chitinous hamuli. The marginal teeth of the opercular disc are blunt. 

 Thoracic uncini, as stated by Grube, show about nine teeth. 



Another specimen, growing upon the tube of a larger species from South-east 

 Cheval Paar, has length of about 20 millims. by width of 1*5 millims. There are 

 seven virgulse on the operculum, and the lamina dorsalis is quite flattened except at 

 the back (Plate VII., figs. 180 and 180a). The uncini from the last thoracic torus 

 show seven teeth. The bayonet setse of the first thoracic fascicle show two clear 

 spines at the base of the terminal process (Plate VII., fig. 181). 



Eupomatus exaltatus, Marenz. Plate VII., fig. 182. 

 VON Marenzeli.er, 'Siidjap. Ann.,' ii., 1884, p. 217. 

 Station V., off Chilaw, Gulf of Mauaar, 11 fathoms; one specimen without tube. 



