107 



withdrawn, and the disc and mantle somewhat contracted, but the species 

 are represented in an excellent manner *. Mr. Adams possesses a drawing 

 of the F. lavigata, taken from the living animal, wliich will probably ap- 

 pear in the 'Zoology of the Voyage of H.M.S., Samarang^; in the mean 

 time he has kindly furnished me with the following from his note-book : — 



" The Ficula is a very lively animal when observed in its native element, 

 crawling along with considerable velocity, owing probably to the lightness 

 of its shell, and able to ascend the sides of a glass vessel with facility. The 

 disc is very extensive and not provided with an operculum ; it is broad 

 and rounded in front, and acuminated behind, the mantle is tliin and 

 expands into two lateral lobes covering a great portion of the sides of the 

 shell, and much more, in the water, than is represented in the handsome 

 figui'es of M. Rousseau. The proboscis is rarely exserted when the animal 

 is in motion, but the long tapering tentacles are stretched out to their full 

 extent ; the eyes are rather large and black. 



" In the species I observed [Ficula laevigata, Reeve,) the mantle was 

 bright pink, mottled with white and lighter pink ; the under surface of the 

 disc was of a dark chocolate colour with yellow scattered spots ; the head 

 and neck were pink, and also covered with yellow spots. The specimen 

 was dredged from thirty-five fathoms in the Sooloo Sea." 



For figures and a critical analysis of the species, I must refer the reader 

 to the Monograph Ficula, in the ' Conchologia Iconic a '. 



Species. 



1. decussata (Bulla.), Wood. 3. gracilis (Pyrula.), Sowerliy. 



3. ficoides (Pyrula.), Lamarck. 4. laevigata, Reeve. 



Genus 7. CANCELLARIA, Lamarck. 



Animal ; disc ohlong, thin, Jlattened, slightly truncated anteriorly 

 and extending a little beyond the head ; head very large and 

 flat forming the segment of a circle at each corner of the 

 extremity of which rises a slim elongated cortical tentacle ; 

 eyes situated on the otiter side of these at the base where they 

 are a little exserted ; proboscis none ? Operculum none. 



* The term Ticus was used by Martini as a commou appellative, not in accordance with the 

 prescribed form of nomenclature ; it is moreover open to objection in consequence of its being 

 pre-occupied in Botany to distinguish the genus of Figs. 



p2 



