﻿DALL] REVIEW of frog-shells AND TRITONS 133 



Genus DISTORTRIX Link, 1807 



Type Murex anus Linne. Recent. .Synonyms: Distorsio (pars) 

 Bolten, 1798; Persona Montfort, 1810, Fischer, 1883; Distorta 

 Schumacher, 1817; Cassida Dillwyn (in syn.), 1817, not of Linne, 

 1767. 



Genus CYMATIUM Bolten, 1798 



Type Murex femorale Linne. Recent. Synonyms: Lotorium 

 Montfort, 1810, Cuvier, Fischer, etc.; Currus Lesson, 1842; Luterium 

 Herrmannsen, 184' >. 



Three-sided speeies with a produced canal and narrow apically 

 nucleate operculum. 



Section Lampusia Schumacher, 1817 

 Type Murex pileare Linne. Recent. Synonyms: Lampusia a 

 Schumacher, 1817; Simpulum Morch, 1852, Troschel, Fischer, etc., 

 Simplum Stoliczka, 1867. 



Section Ranularia Schumacher, 1817 



Type Triton clavator Lamarck. Recent. Synonyms: Ranula 

 Schumacher, 1817: Monoplex Morch, 1852; Ranularia Morch, 

 1852, Cossmann, 1903, etc. 



This group includes the forms with a short almost turbinate spire, 

 long and slender canal, and a heavy, mostly smooth, deposit of callus 

 on the body continuous with that on the outer lip. 



Section Tritonocauda Dall. nov. 



Type Murex caudatus Gmelin (-{-Triton canaliferus Lam.). 

 Recent. Synonym: Ranularia Fischer, 1884, non Schumacher, 

 1817. 



A group of thin shells, in form resembling Ranularia but with a 

 thin wrinkled callus on the body. Operculum mid-lateral, slightly 

 within the margin (C. cynocephalum Lam.) fide Tryon. 



Section Gutturnium Morch, [852 



Type Triton tuberosum. Lamarck. Recent. Synonym: Guttur- 

 nium H. and A. Adams, Troschel. 



Forms rather regularly fusiform, the cone of the spire and of the 

 canal subequal, the canal moderately long, slender, strongly recurved, 

 a heavy callus on the body. 



Section Turritriton Dall, nov. 

 Type Triton gibbosus Broderip. Recent. 



