60 



LIMACINIDiE. 



elongate, axis imperforate ; aperture angulated anteriorly, 

 columella smooth, arcuated. 



Si/n. Peracle, Forhes. Scasa, PJdl Spiralis, sp. E^d. 

 and Soul. 



Ex. H. bulimoides, UOrUgny^ pi. 7, fig. 5. Oper- 

 culum, H. bulimoides, fig. 5, a. Shell, H. clathratus, 

 Eijdoux and SouUyet, fig. 5, h. 



These Pteropods, say M. Eydoux and Souleyet, in 

 speaking, in the " Voyage of the Bonite," of their genus 

 Spirialis, are distributed through all seas, and we have met 

 with them alike in the Atlantic, the Indian and Pacific 

 oceans, and in the Chinese seas. 



Species of Heterofusus. 



balea, Ifoller. Mac Andrei, Foi'bes and Hanlei/. 



bulimoides, B'Orb. trochiformis, DVrb. 



clathratus, U^/d. and Soul. retroversus, Flem. 

 Gouldii, Stimp. 



Genus CHELETROPIS, Forbes. 



Shell spiral, turbinate, dextral, imperforate, spirally 

 ridged or double-keeled, and transversely wrinkled ; spire 

 prominent, its nucleus sinistral : aperture ovate, canalicu- 

 lated below, its outer margin furnished with two claw-like 

 lobes, the one central and formed by a prolongation of the 

 margin between the keels of the body-whorl, the other 

 smaller and near the canal ; peristome thickened, reflected, 

 forming a conspicuous margin. 



Operculum — ? 



Ex. C. Huxleyi, Forhes, pi. 7, fig. 6. 



This genus appears to be gregarious, and was taken in 

 a towing-nct in the sea off the south-east corner of Aus- 

 tralia during the voyage of H.M.S. " Rattlesnake." The 



