The N on- Marine Mollusca of Portuguese East Africa. 213 



Theodoxus natalensis (Rve.), 1855. 



1855. Neritina natalensis Eve., Conch. Icon., pi. 16, fig. 75. D.F. 

 Hab. Mozambique. Quilimane (Peters ; Stuhlmann). 

 L. Marques. Inhambane ; Tette (Peters) ; Delagoa Bay ; Estuary of 

 Nkomati R., Rikatla (Junod). 



LAMELLIBRANCHIA. 



Family UNIONIDAE. 



Genus Indonaia Prashad, 1918. 



Indonaia mossambicensis (Ptrs.), 1860. 



Unio mossambicensis Ptrs., Mts., Mai. Blatt. vi, p. 218, pi. 3, figs. 3-5. D.F. 



Hab. L. Marques. Tette (Peters). 



I am indebted to Dr. F. Haas for the correct generic classification of this 

 little known species. 



Family MUTELIDAE. 

 Genus Spatha Lea, 1838. 

 Spatha petersi Mts., 1860. 



1860. Spatha petersi Mts., Mai. Blatt. vi, p. 218, pi. 3, figs. 1-2. D.F. 

 Hab. L. Marques. Tette (Peters) ; Itschongove (Schenck) ; Nkomati 

 River, Rikatla (Junod). 



Spatha wahlbergi (Krs.), 1848. 

 1848. Iridina wahlbergi Krs., Siidafr. Moll, p. 19, pi. 2, fig. 1. D.F. 

 Hab. L. Marques. Tette (Peters) ; L. Pavi, Inhambane (Junod). 

 Junod's shells represent rather an obese form, the measurements being : 

 Long. 87-0; alt. 41-5; diam. 29-5 ; umbones from anterior border 23-7 mm. 

 „ .55-5; „ 27-0; „ 16-5; „ „ „ „ 16-0 mm. 



var. dorsalis Mts., 1897. 

 1897. Spatha wahlbergi Krs., var. dorsalis, Mts., D.-O.-Afr. iv, p. 247. D. 

 Hab. L. Marques. Tette ; Sena (Peters). 



Genus Mutelina Bourguignat, 1885. 

 Mutelina rostrata (Rang), 1835. 



1835. Iridina rostrata Rang, Nouv. Ann. Mus. Paris, p. 316. D. 



1836. Iridina coelestis Lea, Syn. Naiades, p. 57. D. 

 Hab. L. Marques. Tette (Peters). 



This species was inadvertently omitted from my Reference List in 1913. 



