son 



I'UOCEKDINGS 01'^ TIIK MAI.ACOLOGICAL SOCIKTY. 



"Limacula. 

 c. Pedum. 



Family 2 : Spondylida. 

 Spondylus. 

 Pachytos. 

 Podopsis. 

 Dianchora. 

 Plicatula. 

 Hinnites. 

 Harpax. 



Family 'A : Ostreidce. 

 Ostrea. 

 Gryphsea. 

 Exogyra. 

 Alectryonia. 

 *Plectronia. 

 Carolia. 

 Mulleria. 



Family 4 : Plocunida. 

 Placuna. 



Family 5 : Anomiada . 

 Anomia. 

 Placunanomia. 

 Pododesmus. 



Class III: 

 BRACHIOPODA. 



Family 1 : Lingididrv. 



Lingula. 

 F-Ain\\j2:TerebratuUdic. 



a. Terebratula. 



b. Spirifer. 



Family 3 : Productidie . 

 Productus. 

 Calceola ? 



Family 4 : Tliccidcidce. 



Thecidea. 

 Family 5 : Craniadiv. 



Crania. 

 Family 6 : Discinidce. 



Discina. 



October 16, 1840. 



Class IV : 



PTEROPODA. 



Order I : Thecosomata. 



Family 1 : Cleodorido'. 



a. Hyalsea. 

 *Diacria. 



b. Cieodora. 

 Balantium. 

 Pleuropus. 

 Vaginella. 

 Creseis. 

 Brochus. 

 Psyche. 

 Euribia. 



Family 2 : Limacinidce. 



Limacina. 

 Family 3 : Cuvieridfe. 



Cuvieria. 

 *Tripteres. 



Family 4: Cymbuliadcc. 

 Cymbulia. 



Order 2 : 

 Gymnosomata. 



Family 1 : 



Pneumodermidce . 

 Pneumodermon. 

 Spongobranchia. 

 Trichocyclus. 



Family 2: Cymodoceadcv. 



Cymodocea. 

 Family 3 : ClionidcB. 



Clio. 



p. 152. 



Class V: 

 CEPHALOPODA. 

 Order I : Sepiophoka. 

 Family 1 : Octopodida. 

 Ocythoe. 

 Octopus. 

 Eledona. 

 Philonexus. 



Family 2 : Sepiadce. 

 Sepiola. 

 Onychoteuthis. 

 *Peratoptera. 

 Ommostreplies. 

 Loligopsis. 

 Cranchia. 

 Loligo. 

 Sepioteutliis. 

 Sepia. 

 Beloptera. 



? Family 3: Belemnitidce . 

 Belemnites. 

 Belemnosepia. 



Family 4 : SpirulidcB. 



Spirula. 

 Family 5: Avinionitidcp. 



Ammonites. 



Planites. 



Globites. 



Crioceratites. 



Cyrtoceras. 



Clymene. 



Scaphites. 



Hamites. 



Turrilites. 



Baculites. 



Order II : 

 Nautilophora. 

 Family 1 : NautUidcv. 

 Omphalia. 

 Nautilus. 

 Lituites. 

 *Orthostoma. 

 Gyroceratites. 

 Orthoceras. 

 Conoceras. 

 *Cyrtolites. 

 Actinoceras. 



Family 2 : Goniatida\ 

 ^Phragmolites. 

 Ceratites. 

 Goniatites. 



John Edward Gray. 



Tlie iKUUL's wliicli woro \U',\\ to scieiieo in the preceding; list I h;iv« 

 marked with an asterisk, hut it will be obvious to every student 

 that these cannot be treated otherwise than as nomina nuda, and 

 must date from some later introduction. 



In tlie forty-third edition, dated 1841, tlie same general account of 

 the MoUusca is given as in 184()a, and a list follows, the note at the 



