BY W. A. HASWELL, M.A., B.Sc. 759 



18. Porcellana vigintispinosa, sp. n. 



Carapace faiutly lineolate ; front trilobed, the middle lobe 

 sub-acute, more prominent than the lateral, which are obscure ; 

 four minute acute spiniform teeth on the lateral border just behind 

 the eye, the last of the four the largest ; further back and 

 separated by an interval from these are sis more acute teeth, 

 the first three very small, the last three larger. Left chelipede 

 larger than the right ; merits strongly crested internally, the 

 crest armed with one or two obscure denticles ; carpus with a 

 sharp crest, divided into three teeth in its proximal portion, 

 entire in its distal portion ; propodos rounded, smooth. Length 



tV in. 



Holborn Island, twenty fathoms (Mr. Alex. Morton). 



19. Porcellana corallicola, sp. n. 



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 



ye- in. 



Port Molle, on coral reefs. 



20. Porcellana transversa, sp. n. 



Carapace much broader than long, nearly smooth, lineolate 

 behind, the regions faintly defined ; protogastric lobes prominent. 

 1 W 



