CLASSIFICATION OF THE MAIOID CRUSTACEA. G71 



closed and tlio slender antcnnoe consequoutly excluded from tlio 

 orbit. 



Harrovia, Ada7ns ^ White. (Plate XIII. fig. 11.) Carapace 

 slightly tuberculate, lateral si)iue small. Front broad, truncated, 

 and divided by three fissures into four lobes, of whicli 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 

 Leucosiida). By Stimpson it was considered synonymous with 

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

 With the preceding, it appears to constitute almost a connecting 

 link between the Parthenopina3 and the Eriphiidte {Trapezia). 

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

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

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

 stome, as in the Eriphiidae. 



Appendix. 



*G-0Ni0TH0BAX, A. M.-Edwards. This genus, which has been 

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

 author, to JEpialtus and AcantJionyx, but differs in the length of 

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

 antennal region. The antennae define the orbits below ; their 

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

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

 the third being remarkably long. Type Goniothorax ruber, A. 

 M.-Edwards. 



*Lepidonaxia, 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, whicli is dilated and unarmed 

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

 donaxia Defilippii, Targ.-Tozetti. 



Plattlambetjs, Stimpso?i. This generic name was suggested 

 by Stimpson in case it should be found practicable to separate 

 from Lamlrus thei. crenulatus, Saussure, and such allied species 



linn. JOURN. — ZOOLOGY, YOL. XIY. 50 



