43 



teeth, that is, alteniating with thein. Malė organ elongate, subcylin- 

 drical, compressed, of the šame diameter the whole length, rounded 

 at the end with a slight groove on its outer edges, which is not con- 

 tinued up the body as in Malea. 



Leucozonia angulata. 



Animal red ; the foot, when contracted, folded up across behind, 

 aud lougitudinally in front, leaving a j^-shaped groove ; tentacles 

 close together at their base, diverging, flat, with the eyes on the 

 outer side rather below the tip, which is narrower and acute ; pro- 

 boscis completely retractile, clavate ; Ungual membrane elongate, 

 rather narrow ; teeth in three longitudinal series, the centrai series 

 rather narrower than the lateral ones, square, with a rather arched 

 anterior edge, with elongate, conical, acute denticulations, the centrai 

 denticulation being the largest and longest; the lateral teeth bandlike, 

 rather oblique, front edge with several distinct, conical, acute den- 

 ticulations, the one at the edge of the inner margins near the centrai 

 tooth being much the largest and longest ; operculum ovate, acute, 

 thick ; nucieus apical. * 



C. TjENIOGLOSSA. 



Fam. DoliidjE. 



The proboscis of this family is very long, large, and more or less 

 dilated, with an open rather trumpet-like mouth at the end. 



Malea ringens. 



Animal likę Bolium. Lingual membrane narrow, elongate, wider 

 in front ; teeth in seven longitudinal series, dark red, in each cross 

 series, 3 • I • 3 ; the centrai teeth broad, lunate, thin, with a centrai 

 recurved apex, and sometimes a small denticle for each side, halfvvay 

 between the tooth and the end ; the lateral teeth subulate, curved, 

 acute at the top ; cervical collar of two ovate, horny platės, covered 

 with crowded converging subulate teeth; foot short, truncated in 

 front, rounded behind ; proboscis cylindrical, large, retractile into a 

 sheath uuder the tentacular veil ; mouth open at the end ; tentacles 

 subulate ; eyes on short tubercles at the outer hinder side. Malė 

 organ very large, compressed, with marginai groove on the outer side, 

 continued up the right side of the body by the side of the rectum, 

 and vdth a sleuder filiform appendage near the tip. Operculum 

 none. 



Fam. Tritoniad^. 



The animals of this family are intermediate in character between 

 the ProboscidifercB and the Rostriferee. The proboscis is larger and 

 thicker than in the other famihes of the Proboscidiferce, is not so 

 much retracted, and is coutained in a more free sheath, and the end 

 of the retracted trunk is often partly exposed beyond the margiu of 

 the sheath, giving the animal somcwhat the external appearance of 

 the Bostri/eree, and explaining why some of the Freuch figures of 



