GODWIN-AITSTETf : PAETPHANTA. 5 



OJSr THE MOLLUSCAN GENUS PARYPHANTA AND ON THE 

 ANATOMY OF P. HOCHSTETTERI, Pfr. 



By Lieut. -Colonel H. H. God win- Austen, F.R.S., etc. 



Bead May Uih, 1893. 



PLATE I. 



Throitgh the kindness of Mr. S. J. Da Costa, I have been enabled 

 to examine the animal of Helix ITochstetten, sent to him from New 

 Zealand in spirit ; he placed in my hands two specimens which had 

 been extracted from the shells, so that a portion of the animal was 

 lost in both cases and I am unable to give a complete drawing of the 

 generative organs, but as the missing portion consists of the her- 

 maphrodite gland and duct with the albumen gland it is not of so much 

 importance ; the same remark also applies to the alimentary canal and 

 neighbouring parts. 



This species is very closely allied to the type of the genus Pary])hanta, 

 founded by Albers,' who included in it 14 species ; of these only two 

 can now be retained, viz., P. Bushy i, Gray (1841), which is fortunately 

 quoted as the type, and P. Ililligana, Pfr. (1852) ; to these Professor 

 P. W. Hutton in an excellent paper on New Zealand Land Mollusca^ 

 added P. Hochstetteri, Pfr. (1861), and P. GUUesii, Smith (1880), 

 four species in all. Of the remaining twelve species originally placed 

 in the genus, one, P. urnula, Pfr., has been transferred to Rliytida on 

 the authority of Hutton; two species, P. coresia, Gray, and P. Jeffrey - 

 siana, Pfr., pass into his new genus JSlcea, (1883)-; another, P. obnubila, 

 Reeve, goes to Thalassia; whilst P. splendidula, Pfr., a veiy different 

 form, which I only know from Sowerby's di'awing,^ apparently not 

 from New Zealand but from Torres Straits, must be placed in some 

 other genus together perhaps with another species, P. atramentaria, 

 foreign to New Zealand and coming from Victoria. One species, P. 

 lamhda, Pfr., is the same as P. obnubila mentioned above, and the 

 remaining five species, viz. : — P. omega, Pfr. = P.compressisoluta, 

 Reeve (1852), chiron, Gray, crehifiammis, Pfr., pMogophora, Pfr., and 

 rapida, Pfr., have been placed, by Hutton in Amphidoxa, but on what 

 grounds is not clearly shewn. 



Amphidoxa was founded by Albers,* the type being Helix mar- 

 morella, Pfr., with a second closely allied species, Amphidoxa 

 Jielicophantoides, Pfr., both from Juan Fernandez. They are figured 

 by Sowerby in the Conchologia Iconica, PI. cxiii., and both are 

 obliquely streaked, being thus similar to Helix zebra, Guillon (1842) = 

 pldogophora, Pfr., 1849 = fiammigera, Pfr. (1852) = multilimbata, 

 Hombron and Jacquinot (1854) ; similar markings distinguish 

 Amphidoxa chiron, Gray, and A. crehrijlammis, Pfr. This character, 



1 "Die Heliceen," 2n(l ed. 1860, p. 48. 



* Trans. New Zealand Inst, xvi., p. 207. 



3 Reeve " Couch. Icon." Helix PI. cl., No. 973. 



* "Die Heliceen," 1860, 2nd ed., p. 82. 



