106 



146. Modiola semitestita, Dunker, Mai. Bl. xviii., p. 173, 

 1871. Pema flavida, Angas, P. Z. S., 1865, p. 653 (non 

 Dunker). Plate 5, figs. 16a— 16 b. 



Nesting in mud between tide-marks, Port Adelaide Creek, 

 and elsewhere in St. Vincent Gulf ■ Laura Bay on the west 

 coast. Also King George Sound!, St. Vincent Gulf {Dunker). 



Narrowly oblong, with a chesnut-brown shining epidermis, 

 folds of growth conspicuously raised ; length three-quarters of 

 an inch. 



I fail to recognise the woolly investiture which Dunker de- 

 scribes as clothing the shell, and think the author has mistaken 

 for it the raised epidermal lamina? encrusted with the foreign 

 matter of its burrow. 



147. Modiolaeia eaebata, Eeeve, Mon. Lithodomus, t. 5, 

 f . 27 ; Lithodomus laniger, Eeeve, op. cit., f . 30 ; Modiolaria bar- 

 bata, Angas, P. Z. S ., 1867, t. 44, f. 12, p. 911. 



Streaky, Fowler, Aldinga, and Holdfast Bays. Also New 

 South "Wales (type). 



Oblong-ovate, with the epidermis long thick and fibrous 

 posteriorly ; length about half an inch. 



148. Modiolaeia Cuminglasa, Eeeve, Mon. Modiola, t. 9, 

 f . 63, 1857 ; Lanistina nana, Dunker, P. Z. S., 1856, p. 365 ; 

 Modiola nana, Eeeve, Mon., t. 10, f. 69 ; Crenella {Modiolaria) 

 Adolphi, Dunker, Mai., xviii., p. 173, 1871. 



Throughout South Australia, living on sponges, and amidst 

 the parasitic growth on oysters and pinnae. Extends around 

 the east coast to Port Darwin. 



Oblong-oval, inflated ; colour, brown, yellow, or in the young 

 stage green mixed with brown. Attaining to a length of one 

 inch. 



Lanistina nana, founded on specimens in the Cumingian col- 

 lection from Port Lincoln, is evidently the fry of M. Cuming - 

 iana ; the rufous variegation and pellucidity which chara- 

 terises the early stage of growth are lost in aged examples. 



Crenella Adolphi, of the same author, the type of which is 

 from St. Vincent Gulf, seems in no way to differ, so far as 

 description admits of forming an opinion, from M. Cuming- 

 iana. 



149. Modiolaeia Pauluccije, Crosse and Fischer (Crenella), 

 Journ. de Conchy., 1863, p. 89, t. 1, f. 8. 



Among Zostera?, Fowler, Denial, and Laura Bays, on the 

 west coast ; Spencer and St. Vincent Gulfs. 



Oblong-ovate, depressed ; broad posteriorly, there orna- 

 mented with broad, distant radial ribs ; varying in colour from 

 yellow, brown, to bright green, sometimes painted with undu- 

 lose purplish-brown markings. Length, half an inch. 



