248 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



The following are the species of these groups so far known from the 

 region in question: 



Opisthosiphon (Opisthosiphona) herryi Clapp. 



Opisthosiphon (Opisihosipliona) herryi herryi Clapp. 



Opisthosiphon (Opistho siphon a)herryi semiapertum, new subspecies. 



Opisthosiphon (Opisthosiphona) paredonense, new species. 



Opisthosiphon (Opisthosiphona) paredonense paredonense, new 

 subspecies. 



Opisthosiphon (Opisthosiphona) paredonense transitorium, new 

 subspecies. 



Opisthosiphon (Opisthosiphona) ohturatum, new species. 



Opisthosiphon (Opisthosiphona) ohturatum ohturatum, new sub- 

 species. 



Opisthosiphon (Opisthosiphona) ohturatum suhohturatum, new sub- 

 species. 



Opisthosiphon (Opisthosiphona) ohturatum hanaoense, new sub- 

 species. 



Opisthosiphon (Opisthosiphona) apertum, new species. 



Opisthosiphon (Opisthosiphona) dalli Torre and Henderson. 



Opisthosiphon (Opisthosiphona) hioscai, new species. 



Opisthosiphon (Opisthosiphona) hioscai hioscai, new subspecies. 



Opisthosiphon (Opisthosiphona) hioscai tersum., new subspecies. 



Opisthosiphon (Opisthosiphona) salustii, new species. 



Opisthosiphon (Opisthosiphona) evanidum, new species. 



Opisthosiphon (Opisthosiphona) evanidum evanidum, new subspecies. 



Opisthosiphon (Opisthosiphona) evanidum degeneratum, new sub- 

 species. 



Opisthosiphon (Opisthosiphona) occultum, new species. 



Opisthosiphon (Opisthosiphon) protractum, new species. 



Opisthosiphon (Opisthosiphon) judasense, new species. 



Opisthosiphon (Opisthosiphon) detectum, new species. 



Opisthosiphon (Opisthosiphon) obtectum, new species. 



Opisthosiphon (Opisthosiphon) obtectum obtectum,, new subspecies. 



Opisthosiphon (Opisthosiphon) obtectum tenuicostum, new subspecies. 



Opisthosiphon (Opisthosiphon) lamellicostatum , new species. 



Eutudora (Eutudorops) paradoxum, new species. 



OPISTHOSIPHON (OPISTHOSIPHONA) BERRYI Clapp. 



Opisthosiphon herryi Clapp, Nautilus, vol. 32, No. 3, 1919, p. 86, pi. 7, fig. 14. 



Plate 38, figs. 1-4. 



Shell longitudinally finely plicate, ochraceous buff, encircled with 

 a broad chocolate-brown band on the periphery of the last whorl and 

 on the lower half of the earlier whorls; slightly shining; decollated. 

 Suture deep, crenate, four or five spiral ridges appearing on the 

 umbilical region. Remaining whorls four, very convex. Aperture 



