B. 2. Systematik. d) Gastropoda. 83 



cinulus] fraterculus n. ibid.; id., p. 1G1, T. 13. F. 2123 nitidus n. (= Auri- 

 culina insculpta Verr. 1880 nee Mtg.) New-England; Verrill ( 238 ), p. 540. 



Aplustridae. 

 Hydatma (Schum.) infataDkr. Abgebildet von Dunker ( 7S ), T. 2. F. 14-16. 



Philinidae. 



Philine (Asc.) tincta n. Neu-England ; Verrill ( 23S ), p. 544 <wafo7s Verr. Zum 

 ersten Male abgebildet ; id., T. 58. F. 23, 24. 



Aply siidae. 

 Notarchus Cuv. ; Vayssiere ( 234 ) hat bei punctatus eine rudimentare Schale gefunden. 



Pleurobranchidae. 



Koonsia n. gen. Verwandt mitPleurobranc/iaea, aber mit geschwollenem, nach hinten 

 und an denSeiten iiberhangendem Rticken und deutlichem, durch eine tiefeGrube 

 abgegrenztem Mantelrand ; Verrill ( 23S ), p. 545 - obesa n. Neu-England; id., 

 p. 545. 



Pleurobranchaea (Meckel) tan/a Verr. Zum ersten Male abgebildet von Verrill ( 23S ), 

 T. 58. F. 26.' 



p) Nudibranchia. 

 Dorididae. 



Acanthodoris (Gray) omafo Verr. Zum ersten Male abgebildet von Verrill ( 23S ), T. 42. 



F. 12 Jnfida Verr. Wird id. p. 549 ftir stellata var. erklart. 

 Doris (L.) complanata Verr. Zum ersten Male abgebildet von Verrill ( 23S ), T. 58. 



F. 34 welling tonensis. Zungenbewaffnung abgebildet von Mutton ( 127 ), T. 7. 



F. G. 



Heterodoridae. 



Heterodoris n. gen. : Form and general appearance somewhat like Triopa and Trio- 

 pella, but stouter and without any trace of gills. Mantle forming an edge all around 

 the back ; surface of the back with scattered papillae ; a longitudinal crest bet- 

 ween and behind the dorsal tentacles, which are lamellose and retractile, with- 

 out sheaths, but with a prominent fold of the mantle-margin in front of them. 

 Head large, rounded, with a free, thin margin, which has a flat tentacular lobe 

 on each side. Foot broad, rounded in front. A large opening, apparently the 

 anus, on the right side between the mantle and the foot, behind the middle. 

 Verge , as protruded , stout , cylindrical , swollen and rounded at the end , not 

 armed; a short, stout, conical papilla just behind its base , and a lobe below it ; 

 farther back , nearer the anal (?J opening there is a small, simple opening, pro- 

 bably urinal. - - Odontophore broad, with very numerous, small, strongly hooked, 

 acute teeth in each row, all similar except a few near the centre, which are less 

 curved and not so acute; no median tooth ; Verrill and Emerton ( 23S ), p. 548 

 robustaV. and E. Neu-England; id., p. 549, T. 58. F. 35. 



Tritouiidae. 



Dendronotus (A. and H.) velifer Sars = dem fru'her publicirten robustns Verr. ; Verrill 

 ( 238 ), p. 550. 



li* 



