and Oaslropoch from (he Ful/clund hlauds. 037 



LaviVilorina latior, sp. n. (Fig. 2.) 



►^lioll oviitely fusiform, rather broad in proportion to its 

 liei,i;lit, seniicorneous, dark blackish brown, shading to a 

 yellowish brown behind the labruni, and having a broad 

 basal band of the same colour j whorls 6, the last considerably 

 •swollen, having a somewhat weathered appearance under 

 the microscope, and marked oidy with transverse lines of 

 growth ; suture well impressed ; columella \cvy obliquely 

 descenditig above, somewhat sharply curved below ; labrum 

 continuous, slightly dilated below, simple on the outer side 

 and callously thickened in the parietal region ; aperture 

 broadly ovate; interior of shell shining, brownish purple 

 except towards the base, where it is yellowish brown ; oper- 

 culum thin, horny, polished, shining, with excentric nucleus 

 and having three or four convolutions. 



Alt. -i-o, diani. niaj. 3"25, diam. niin. 2*5 mm. 



Aperture : alt, 2-75, diam. 1-75 mm. 



Hub. Port Stanley Harbour, Falkland Islands {A. G. 

 Bennett). 



Nucula falklandiccif sp. n. (Fig. 3.) 



Shell small, obliquely ovate, moderately solid, covered 

 throughout with a cream-coloured periostracum, marked 

 with coarse concentric strias and broad, rather closely set, 

 radiate costul?e, which are more apparent towards the ventral 

 margin ; margin of shell finely crenellate by the terminations 

 of the radiate costulte ; umbones large, slightlj' prominent, 

 highly iridescent; dorsal margin rounded anteriorly, rapidly 

 sloping posteriorly ; ventral margin rounded ; anterior side 

 rounded above, obliquely curved below ; posterior side very 

 slightly curved, almost vertically descending, serrated ; hinge- 

 teeth coarse and somewhat distant in both valves ; interior 

 of shell shining, pearly, bluish white. 



Long, o, lat. 2'5 mm. 



IJah. Port Stanley, Falkland Islands ; taken from the 

 stomach of a fish (A. G. Bennett). 



Cyamium hennetti, sp. n. (Fig. 4.) 



Shell thin, obtusely cuneiform, white, iridescent, covered 

 with a thin cream-coloured periostracum, sculptured with 

 fine concentric growth-lines ; both valves radiately angled 

 posteriorly ; umbones moderately lai'ge and prominent ; 

 dorsal margin anteriorly concavely shari)ly sloping, poste- 

 riorly concavely gently sloping ; ventral margin very gently 



