— 188 — 



Paeltytoma Swnins. contin, 



Etym. naxvs, crassiis; Te/iivo), scindo. *') 

 Subgenus Helicinae. Typus: Helicina occidentalis 

 Guild. 

 Pacliytos Defr. 1825. Dict. sc. nat. tom. .37. p. 206. Conf. 

 Fer. Bull. sc. nat. V. p. 142. 

 Etym. naxvg, crassus. (Pachytus corr. Agass.) 

 A Piagioslomis separatum genus. Typus : Plagiosto- 



ma spinosa Sow. 

 Blainv. 1825. Malac. p. 513. (nomine Plagiostomae) 

 cf. ib. p. 630. — genus Palliobranchiatorum sym- 

 metricorum. 

 Desh. 1828. Ann. sc. nat. XV. * et 1832. Enc. meth. 



IIJ. p. 688. Spondylo injungit. 

 Menke 1830. Syn. ed. 2a p. 100. — Pachyta — 

 gcnus Pectineoruni. 



Pariter Pot. et Mich. 1814. Gal. II. p. 93. 

 CuviER 1830. R. a. ed. 2a. (ed. Voigt. 111. p. 455.) 



— genus Ostraceorum monomyorum. 

 Bronn 1838. Leth. p. C84. — subdivisio Spondyli. 

 Gray 1842. Syn. Brit. Mus. p. 92. — genus Spon- 

 dylidarum. 

 Pacliytos (Defr.) Blainv. Mal. p. 522. errore. 



= Plagiostoma Sow. (leste ipso Blainv. ibid. p. 630.) 



Pacliytus Agass. 1847. Nom. zool. Ind. univ. vid. Pachytos. 



Pacmes MoNTF. 1808. Conch. syst. I. p. 318. Cf. Defrance 



1825. Dict. sc. nat. tom. 37. p. 208. Desh. Enc. 



meth. III. p. 688. et Sow. jun. Conch. Man. ed. 



2a p. 213. 



Etym. ? 



Genus ineptum ad Belemnitas referendum. 

 Latr. 1825. Fam, nat. — Paclitus — genus Or- 

 thocerorum. 

 Paclltus Latr. vid. Paclites. 



87) Pachytoma Costa (1841.) genus Hemipterorum 



