BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 10. N:0 11. 13 



Tlie 2)/6'0?i is immcrscd, thoiigh not deeply; the first seg- 

 ment is broader tlian half of the fifth. 



The urus is only a third broader than long; the sides are 

 straight, the hinder margin bnt slightly excavated. 



The iirojwda are not much shorter than the urus. 



The general habitus of the animal is morc similar to the 

 åiawing of Ceratothoa ci^assa, given by Dana 1853 in his splendid 

 work »Crustacea» from »The United States exploring expedi- 

 tions, than to the description and the figures of Glossobiiis 

 laticauda in Schioedte and Meinert's new excellent treatise 

 »Symbolae ad monographiam Cymothoarum», and, for my part, I 

 suppose, that the last-named authors are wrong in making 

 Dana's Ceratothoa crassa synonymous to Milne-Edwards' Cymo- 

 thoa laticauda. ^) But the animal here described is pro- 

 ved to be distinct from both of them, Glossobius laticauda, 

 H. Milne-Edwards, as wcll as Glossobius crassus. Dana, not 

 only by the habitus of the ovigeroas female, but also by many 

 details. The males of most of these animals are so similar to 

 one another, that it is very difficiilt to indicate quite good 

 characteristics for the different species; but the male of the 

 new Glossobius shows some differences from the hitherto knowu 

 two species of males, G. liuearis and G. laticauda. The male 

 of G. crassus is not known. 



Ovigerous female. 

 Pl. III. lig. 24—28. 



The form of the body is ncarly elliptical, the anterior 

 part being convex and somewhat compressed, the posterior 

 more ilattened. The lifth segment of the pereion is the broadest, 

 the first is the narrowest. 



') Glossobius, crassus Dana, as its name oiight to be now-a-days, differs 

 from Glossobius laticauda, Milne-Edwards, by a broader and stoutei' 

 head, a more ovate form of the body, and a different form of the urus. 

 the urus being more quadrangular with the hinder margin only feebly 

 excavated. The first segment of the pereion is also longer and narrower 

 in comparison with the fourth than in G. laticauda. The third pereional 

 segment is the broadest of all, not the sixth as in G. laticauda. The 

 seventh segment is very narrow, narrower than the first, with the corners 

 covered by the sixth. The femora of the sixth and seventh pairs of 

 perieopoda are quite as broad as long. 



