CLASSIFICATIOIT OP THE MA.IOID CETJSTACEA. G71 



closed and the slender antennae consequently excluded from the 

 orbit. 



Haeeotia, Adams ^ White. (Plate XIII. fig. 11.) Carapace 

 slightly tuberculate, lateral spine small. Front broad, truncated, 

 and divided by three fissures into four lobes, of which the 

 median are truncated and the lateral acute. Anterior legs elon- 

 gated, ambulatory legs slender. Type Harrovia alho-lineata, 

 Adams and "White. 



This genus was wrongly placed by Adams and White with the 

 Leucosiidse. By Stimpson it was considered synonymous with 

 Geratocarciniis ; but it is as distinct as any other of the group. 

 "With the preceding, it appears to constitute almost a connecting 

 link between the Parthenopinge and the Eriphiidge {Trapezia) . 

 As the specimens are dried and almost unique, I have not been 

 able to examine the buccal cavity ; but in the allied genus Gonato- 

 notus there are clearly-marked longitudinal ridges on the endo- 

 stome, as in the Eriphiidse. 



Appendix. 



*G-ONiOTHOEAX, A. M.-Eclwards. This genus, which has been 

 described since my paper was read, is allied, according to its 

 author, to JSpialtus and Acanihonyx, but difl^ers in the length of 

 the non-prehensile ambulatory legs and in the structure of the 

 antenual region. The antennae define the orbits below ; their 

 basal joint is small, not reaching to the summit of the antennu- 

 lary fossse ; the two following joints are nearly as thick as the first, 

 the third being remarkably long. Type Qoniothorax niier, A. 

 M.-Edwards. 



*LEPiDO]srAXiA, Targioni-Tozetti. I have not been able to con- 

 sult the author's recently published ' Eeport on the Brachyurous 

 and Anomourous Crustacea collected during the voyage of the 

 corvette ' Magenta ;' ' but, to judge from the description of this 

 genus, quoted by Y. Martens in the ' Zoological Eecord ' for 1877, 

 it would seem to be allied to Hyastenus, differing, however, in 

 the form of the basal antennal joint, which is dilated and unarmed 

 externally, unidentate posteriorly and in the middle. Type Lepi- 

 donaxia Defilippii, Targ.-Tozetti. 



Plattlambbtjs, Stimpson. This generic name was suggested 

 by Stimpson in case it should be found practicable to separate 

 from Lamhrus the L. crenulatus, Saussure, and such allied species 



LINX. JOUEIS". — ZOOLOGY, VOL. XIV. 50 



