VictorioM Decapod Crustacea. 61 



two rows of three small flattened tubercles, which are not 

 referred to in the specific descriptions of either of the authors 

 quoted. 



The species does not appear to have been previously figured, and 

 we take this opportunity to do so. 



Tribe — Thalassinidea.. 



Family — Callimiassidae. 



Upogebia simsoni, Thomson. (Plate V., Figs. 5, 6). 



G. M. Thomson, Proc. Roy. Soc. Tasmania, 1892, p. 49, 

 pi. 1, tigs. 3-5. 



This species, which was described by Mr. G. M. Thomson in 

 1892, from a single specimen collected on the east coast of 

 Tasmania, we have found to be fairly plentiful, burrowing under 

 stones resting on a muddy bottom, below low water mark, inside 

 " Black Head," Flinders, Western Port. 



The detailed description given by the author left some doubt 

 in our minds as to the identity of our specimens, and the figure 

 given was of little assistance. Through the kindness of Mr. G. 

 M. Thomson we have, however, been permitted to compare the 

 Victorian examples with the type with which they are in close 

 accord. In case other workers should 1)6 confronted with the 

 same difficulties, we have ventured to redescribe the species and 

 figure one of our specimens. The various details mentioned in 

 our description appear to be persistent, little deviation being 

 observed when a series is examined. 



We revert to the generic name Upogebia for this species in 

 place of the more usually accepted Gebia,' the former name 

 appearing to have undoul)ted priority.^ ■ 



Tlie cephalothorax is laterally compressed, regularly narrowed 

 anteriorly, and somewhat more abruptly posteriorly. It termin- 

 ates anteriorly in three conspicuous lobes, the median one form- 

 ing a flattened rosti'um. The cervical groove is well marked and 

 two lateral grooves define the position of the branchiae. 



The Jrdvt is divided into three parts by two deep grooves 



1 Stebbing, Historj' of the Crustacea, p. 185. 



