from the Australian and China Seas. 477 



these tubercles are themselves considerably more elevated than 

 in tn'spinosus ; moreover, the lateral tubercles of the telson 

 are also much less elongate and more spherical j the notches 

 separating the lobes of the telson are wider than in trispinosus, 

 the external notch being particularly well-marked and 

 widening towards the margin of the plate. 



Measurements in millimetres of largest specimen : — Length 

 from apex of eyes to end of telson 40 ; length of eye 3*3, 

 width of cornea 2 ; length of telson 7*5, width 8*2. 



Two examples from Macclesfield Bank, at a depth of 

 37 fath. 



(11) Gonodactylus Hansenii^ sp. n. (PI. XX. B. fig. 3.) 



Belonging to the same group as G. Edwardsii, scyllarus, 

 cuUrifer, &c. 



Colour (in alcohol) a uniform yellowish pink, with a black 

 patch of colour on the second segment of the external ramus 

 of the svvimmeret. 



Eyes very large and globular, at least as large as in 

 G. Edwardsii. The dorsal plate of the ophthalmic somite 

 deeply bifid in front. Antennal scales about the same rela- 

 tive size as in G. scyllarus^ being considerably shorter than 

 the carapace. 



Rostrum with evenly convex anterior border and evenly 

 rounded angles. 



Manus of the raptorial limbs moderately dilated at the 

 base and armed with nine distinct, sharp, subequal teeth. 

 The margins of the three posterior thoracic tergites narrowed 

 and not dilated even as in G. sci/Uarus. 



The margins of the abdominal somites thickened as in 

 G. scyllarusy the posterior angles spiiied as in that species. 

 The sixth abdominal tergite and telson closely resembling 

 these plates in G. scyllarus, the median being elevated, 

 carinate, and posteriorly spined as in that species ; the crests 

 on each side of the median one not so close to it as in 

 scyllarus, and not divided by a groove ; the median crest not 

 continuous with the crest upon the internal spiniferous process, 

 while the external crest, which in scyllarus lies close to the 

 external edge of the anterior half of the telson, is situated 

 more internally, being in the same line as the external edge 

 of the median process on each side. 



The movable spines on the exopodite of the swimmeret are 

 longer than in scyllarus, the apex of the distal one being on 

 a level with the margin of the distal segment of this appen- 

 dage ; moreover the crests upon the endopodite of the swim- 

 merets are unequal in size, the exterior being considerably 



