Mr. G. C. Robson on Apovemodon. 425 



irregularly oval-shaped, blaekish-brown, large spots on centre 

 of each segment, reacliinp; the anterior but not the posterior 

 border, the last segment aln.ost wholly black ; tlie genital 

 organs large, shining black ; dorsum with sparse, yellow, short 

 pubescence and longer hairs at sides, thickest on the first 

 segment; underside almost wholly blackish, shining. Le(/.'t 

 yellowish, sliining, upperside of femora blackish, apices of 

 tibije and tarsal joints brown ; bristles on legs chiefly 

 yellowish or white. Wings hj aline, apex and posterior 

 border grey ; veins brown, the small transverse vein just 

 beyond middle of discal cell; first posterior cell long and 

 narrow, the fourth closed. 



Female identical ; the ovipositor long, black, including the 

 seventh and eighth segments, compressed at sides. 



[To be continued.] 



XLYIII. — On Aporemo(^on, a rev arhalle neio Fulmovate 

 Genus. By G. C. EOBSON, B.A., British Lluseum (Natural 

 History) . 



(PiiblisLed by permission of the Trustees of the British Museum.) 



It is a familiar fact that certain genera of Mollusca, otlierw ise 

 distinct anatomically, agree in possessing- a sim})le patelliform 

 shell. Such agreement in concbological character is found 

 in genera as different in anatcmy as Acvicea, Siphonarioj 

 Cocculina, ai;d Ancyhis. Tlie new gei;us, for which a name 

 is here proposed, seems to corstitute not only a fresh but also 

 a novel example cf this phenomenon ; for it possesses, 

 along with shell-characters that would approximate it to 

 Cocculina or Propilidhim, a radula which is not only of 

 Pulmonate form, but also resembles very closely tLat of a 

 definite genus of Helicoid Pulmonata. 



The material on which this genus is founded consisted of 

 six complete specimens and an additional shell, a selection 

 from which has been presented by J. R. le B. Tomlin, Esq., 

 to the British Museum. They were bequeathed to Mr. Tomlin 

 by Surgeon-General Archer, who obtained them " on the 

 beach" near Singapore some thirty years ago. No further 

 information is forthcoming, in which any reliance can be 

 placed, for determining the animal's habitat or station, though 

 there can be no doubt that it is a marine form. The soft 

 parts were so shrivelled after thirty years' dessication that all 

 attempts to render them fit for sectioning were fruitless. It 

 is a matter for considerable regret that the rest of the anatomy 



Ann. (Sc 2lag. N. Hht. Ser. 8. Vol. xi. 29 



