1867.] MR. G. F. ANGAS ON AUSTRALIAN MOLLUSCA. 929 



Dark brown, clevately radiately striated throughout, aud clothed 

 with a long fibrous epidermis, the shafts of which are beset with 

 small prickly spines. Amongst rocks and under stones at low water. 

 Length 2^ inches. This species is found also in South Australia 

 and New Zealand. The interior is iridescent green and purple. 



100. Mytiltjs dunkeri. 



Mytilus dunkeri. Reeve, Conch. Icon. Mytilus, pi. 5. f. 17. 



? Mytilus planulatus. Lam. 



This species is so like M. galloprovincialis. Lam., that it may be 

 regarded as its southern analogue. Length 2^ inches. New South 

 Wales, Port Philip, and Tasmania. 



Subfam. Crenellin.e. 



107. Crenella (Modiolaria) strigata. 



Modiola strigata, Hanley, P. Z. S. 1844, p. 15. 



A pretty species, of a greenish horn-colour, richly painted with 

 zigzag purplish-brown markings, and radiately striated at the ante- 

 rior and posterior sides. Length 6 lines. Dredged in sandy mud 

 in Port Jackson. Mr. Reeve, in the * Conch. Icon.' has erroneously 

 given the description and figure of a totally distinct shell as repre- 

 senting Mr. Ilanley's M. strigata ; it is a species of Volsella from 

 the Philippine Islands, for which I would propose the name Vol- 

 sella reevei. 31. conciimu, Dunker, is probably' a variety of M. stri- 

 yata. 



108. *Crenella (Modiolaria) barbata. 

 Modiolaria barbata, Augas, anteci, p. 911, PI. xliv. f. 12. 



A small oblong ovate species, with the epidermis long, thick, and 

 fibrous posteriorly, having somewhat the aspect of Modiola opifex. 

 Say, from Brazil. From the "Seven-mile" beach, Botany Bay. 

 Length 5 lines. 



109. Perna australis. 



Modiola australis, Gray, Appendix to King's Voy.; Reeve, Conch. 

 Icon. pi. 5. f. 21. 



Not unlike M. tulipa. Lam. The young shells are prettily tinted 

 with yellow and crimson. Common on the Australian coasts gene- 

 rally. Length 3 inches. 



110. Perna glaberrima. 



Volsella ylaberrima, Dunker, P. Z. S. 1856, p. 363. 



Modiola ylaberrima, Reeve, Conch. Icon. Modiola, pi. 8. f. 48. 



A somewhat triangularly elongated, shining, thin, horny shell, 

 banded and lined with bronze-purple and green. This species spins 

 a sort of nidus, in which it dwells in black mud in Parramatta River. 

 Dredged at 6 fathoms. Length 2 inches. 



