APPENDIX. 037 



Syn. Echinospira, Krohn. Calcarella, Souleyet. Jasonilla, 

 Macdonald. 



Species of Brownia. 

 angulata, A. Adams. diaphana, Krohn. 



Candei, D'Orb. McLeayiaua, Macdonald. 



carinata, A. Adams. 



The animal of Brownia (Jasonilla) has been thus describe'! 

 by Mr. Macdonald: 



"Animal with eight ciliated cephalic appendages encircling 

 the head. Mouth with two massive lateral jaws, with sharp 

 prominent dental processes on the anterior border. Tentacles 

 simple, with the eyes at their outer bases. Foot elongated, sub- 

 quadrate in front, tapering behind." 



The shell also is thus described : 



" Shell cartilaginous, transparent, planorbular, symmetrical, 

 presenting four rows of minute conical tuberculations on its con- 

 vex or dorsal surface, nucleus sunken, leaving a central per- 

 foration ; outer lip deeply notched between the two lateral rows 

 of tubercles." 



In this interesting and beautiful little genus of pelagian gas- 

 teropods the lingual ribbon is lengthy and flexuous, presenting 

 a row of uncini on each side, which interlock with one another 

 so closely as almost completely to conceal the rudimentary seg- 

 ments of the rachis. A pectinate gill extends beneath the mantle 

 along the anterior third of the dorsal region, lying in advance of 

 the heart. Mr. Macdonald states that he has seen but one 

 species, which was frequently taken between Port Jackson and 

 the Isle of Pines. 



The two new species added to the list, and recently described 

 by one of the authors, were taken by him during the voyage of 

 H.M.S. " Actaeon " in the China Sea. 



Genus ETHELLA, H. and A. Adams. 



(Fam. MACGIIXrVKAYIlD,E.) 



Ciliated arms six in number. Creeping disk rudimentary ; 



VOL. IT. 4 N 



