596 SCIENTIFIC RECORD FOR 1882. 



Schepruanu (M. M.) Die Zungen der HyaliDeu. Mit 3 Taf. Jahrb. deutscb. Malak. 



Gea., 9, Jahrg., pp. 23G-243. 

 Taylor (J. W.) Life History of British Helices. Helix arbuatorum. Witli 1 pi. Jouru. 



of Couchol., V. 3, p. 241-256. 



Aglossate 2^^itdibrant]iiates. 



Grafl'(Ludwig von). Ueber lihodope Feranii Koll. {:=Sidonia elegans M. Scliultze.) 

 Mit 1 Taf. Morpbol. Jahrb., 8. Bd., pp. 73-84. 



Ntidibranchiates. 



Berg (Rudolf). Beitriige znr Kenntniss der Aeolidiaden. Mit 6 Taf. Verhandl. 

 k. k. zool.-bot. Ges., Wien, 1882, pp. 7-74. 



Pectinibranehiatea. 



Carri^re (Justus). Marginella glabella L. und die Pseudomarginellen. Zeitscbr. f. 



wiss. Zool., 37. Bd., pp. 99-120, pi. 9. 

 Haller (B^la). Zur Keuntniss der Muriciden. Eine vergleicbend-anatomiscbe. 



Studie. 1. Tb. Auatomie des Nervensystems. Mit 3 Taf. u, 2 Holzscbn. (Arbeiten 



aus dem zool.-vergl.-anat. Institute der Univers. Wien.) Denkscbr. d. Wien. Akad., 



Matb.-Nat. CI., 45. Bd., pp. 87-106. 



Bhodope a NudibrancJiiate. 



Many years ago a small Avorm-like animal was described by Kolliker 

 under the name IRIiodope Veranii, and approximated by bim to the 

 Nudibranchiate MoUusks, and it has been there retained by several 

 malacologists. Some doubt has been entertained as to its relationships, 

 however, and the same type was redescribed as Sidonia elegans, and re- 

 ferred by Schultze to the Turbellarian worms. Recently the species 

 has been re-examined by Professor Graff, and according to that naturalist 

 it differs from the Turbellarians by its central ganglia, its sensory appa- 

 ratus, its generative organs, and the anus, and in these respects most 

 resembles the Nudibranchiate Gastropods. Nevertheless it is devoid of 

 a buccal mass and odontophore, as well as gills. Although retained in 

 the order of Nudibranchiates, it is therefore regarded as the lowest term 

 of that series. It is considered to be a derivative from a generalized 

 Rhabdocoelid stock named " Alloiocoela" — a conclusion which some may 

 doubt until its embryology is known, and that may be required even to 

 prove its pertinence to the I^udibranchiates. 



A iieio family of American Gastropods. 



Ten years ago, in the Canadian Naturalist, certain small shells found 

 in Postpliocene deposits of Canada were described by Dr. P. P. Carpen- 

 ter as representatives of a new generic type, Ghoristes elegans. Tliis 

 form has been found living by attaches of the TJ. S. Fish Commission 

 in deep water (225 fathoms) off Martha's Vineyard, and an examination 

 of its structure has caused Professor Verrill to differentiate it as a pecu- 

 liar family type — the Choristidte. These are Tectibranchiates with a 

 thick short head; large retractile pharynx; well-developed jaws; an 



