CONTENTS 



PAGE 



Introduction 15 



List of Tortugas trematodes and their hosts 17 



List of hosts and food notes 10 



Key to the genera and species described in this paper 20 



Descriptions of species, habitats, etc. : 

 L Trematodes from loggerhead turtle: 



Cricocephalus delitescens Looss 23 



Distomum sp., related to Calycodes 24 



Pachypsolus ovalis sp. nov 24 



Cymatocarpus undulatus Looss 26 



Orchidasma amphiorchis (Braun) Looss 28 



n. Trematodes from fish: 



Malacotylea 29 



Fasciolidae. 29 



Table of AUocreadiinae 29 



Helicometra torta sp. nov 29 



Helicometra execta sp. nov 31 



Helicometrina nimia gen. et sp. nov 33 



Hamacreadium gen. nov 34 



Hamacreadium mutabile gen. et sp. nov 34 



Hamacreadium gulella gen. et sp. nov 35 



Hamacreadium consuetum gen. et sp. nov 36 



Hamacreadium oscitans gen. et sp. nov 37 



Lebouria crassigula sp. nov 38 



Megasolenaestrix gen. et sp. nov 38 



Didymorchis latus gen. et sp. nov 39 



Enenterum aureum gen. et sp. nov 40 



Theledera (g. n.) pectinata (Linton) 4° 



Lepocreadium trulla (Linton) 41 



Lepocreadium levenseni (Linton) 42 



Distomum sp. (D. valdeinflatum Stossich) 43 



Mesolecitha linearis gen. et sp. nov 43 



Stephanochasmus casus sp. nov 44 



Stephanochasmus sentus sp. nov 45 



Lechradena edentula gen. et sp. nov 46 



Mesorchis urna gen. et sp. nov 47 



Diplangus paxillus gen. et sp. nov 48 



Deretrema fusillus gen. et sp. nov 49 



Distomum fenestratum Linton 51 



Xystretrum gen. nov 51 



Xystretrum solidum gen. et sp. nov 51 



Xystretrum papillosum gen. et sp. nov 52 



Hysterolecitha rosea gen. et sp. nov 52 



Macradena perfecta gen. et sp. nov 53 



Opisthadena dimidia gen. et sp. nov 54 



Brachadena pyriformis gen. et sp. nov 55 



Dichadena acuta gen. et sp. nov 56 



Leurodera decora gen. et sp. nov 57 



Dictysarca virens gen. et sp. nov 58 



Theletrum fustiforme gen. et sp. nov 59 



Hemiurus merus sp. nov 60 



Sterrhurus monticellii (Linton) 61 



Sterrhurus fusiformis (Ltihe) 62 



Ectenurus virgula sp. nov 63 



Ectenurus ( ?) sp., immature 64 



Dinurus rubeus sp. nov 64 



Hapladena varia gen. et sp. nov 65 



Deradena gen. nov 66 



Deradena ovalis gen. et sp. nov 67 



Deradena acuta gen. et sp. nov 68 



Deradena obtusa gen. et sp. nov 69 



13 



