150 AUSTRALIAN MALACOSTRACA. 



the frequent presence of a Bopyrid parasite in the branchial cavity 

 of one side. The shape of the chelipedes varies much with age. 



284. Porcellana corallicola. A.M. 



Porcellana corallicola, Haswell, 1. c. 



Carapace slightly tuberculated at the sides ; the regions well 

 marked. Front not prominent, triangular, with a deep longitu- 

 dinal mesial furrow, its anterior border ornamented with minute 

 denticles which are sometimes acute, sometimes obtuse. Lateral 

 borders with four or five minute spine-like denticles situated 

 about the middle of the branchial region. Carpus and propodos 

 of chelipedes fringed externally with hairs, flat above, curved 

 below ; internal and external borders of carpus armed with a 

 row of acute denticles ; upper surface with three longitudinal 

 rows of granules separated by sulci ; hand compressed, triangular, 

 with rows of granules ; fingers compressed, granular, their inner 

 borders nearly straight, their apices scarcely hooked. Length 



-rs in. 



Port Molle, on coral reefs (W. A. H.). 



285. Porcellana transversa. A.M. 



Porcellana transversa, Haswell, 1. c. 



Carapace much broader than long, nearly smooth, lineolate 

 behind, the regions faintly defined ; protogastric lobes prominent. 

 Front not prominent, nearly straight ; lateral margins entire, 

 scarcely crested. Merus of chelipedes transversely lineolate, 

 hairy ; carpus one and a half times as long as broad, fringed with 

 hairs on its inner border, which projects in the form of a crest, 

 nearly smooth above ; propodos thickly clothed with hairs exter- 

 nally, a longitudinal granular line at its lower border, running to 

 the end of the immobile finger, which has a conical tooth at the 

 base of its cutting edge, and is strongly hooked at its apex ; 

 mobile finger with a granular hairy ridge above, a slight conical 

 tooth at the base of its cutting edge, and with the apex strongly 

 hooked and acute. Length W in. ; breadth iV in. 



Bowen ; found by Mr. Alex. Morton in the siphons of an 

 Aspergillum. 



