112 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



possessed very few species, and often even very few specimens, and the ani- 

 mals being not very easy to examine, and still less to describe and draw, the 

 result is that most of the species are imperfectly represented, and many of the 

 genera badly or not at all limited. Giard and Bonnier have given full descrip- 

 tions of a few species only, as their principal work on this sub-family has not 

 yet been published. They have made an attempt to divide the Bopyrinse into 

 three groups, Phyxiens, Bopyriens, and loniens ; but I am unable to perceive 

 the limits between the two first named groups, and even the group loniens is 

 not very sharply defined. We must wait until a number of still unknown forms 

 have been thoroughly studied and many of the already established species re- 

 examined before it will be possible to divide the sub-family into natural 

 groups. I must add, however, that the few descriptions just mentioned of 

 the two authors have been very useful to me. In 1893, T. E. R. Stebbing, 

 in his well known work, "A History of Crustacea — Recent Malacostraca," 

 gave a very good catalogue of all the twenty-one genera and almost all the 

 species hitherto established. 



I must confess that I have been unable to refer more than one of my five new 

 species to any of the genera hitherto established, and as they are very diflerent 

 from one another it is necessaiy to institute four new genera, — a result with 

 which I am rather dissatisfied, not being sure that they all will prove to be 

 valid. On account of the present state of things, I do not venture to lay down 

 diagnoses of the new genera ; but I hope that by means of my rather numerous 

 figures and tolerably full descriptions it will be easy not only to recognize my 

 species, but also to place the genera properly and work out the diagnoses, when 

 in the future we get a real systematic arrangement. 



10. Cryptione elongata, n. gen., n. sp. 



Plate III. Fig. 5-5 a ; Plate IV. Fig. 1-1 g. 



A fine female with its male (Fig. 1 a, m) was discovered. 



a. Female. 



The body is elongate (Fig. 1) and (the uropods not included) about twice as 

 long as broad ; the greatest breadth at about the middle. 



Head, It forms, when seen from above (Fig. 1), almost a regular transverse 

 oval, with the anterior half projecting in advance of the antero-lateral part of 

 the thorax and the frontal margin considerably and evenly curved ; the dorsal 

 surface somewhat convex, with a depression a little inside of the anterior mar- 

 gin. The antennulce (Fig. 1 h, a) rather distant from each other, of medium size, 

 3-jointed ; the basal joint is considerably enlarged, the terminal joint minute. 

 The antennse (V) rather long, 3-jointed ; the basal joint very large, ovate, with 

 the second joint proceeding from the extero-anterior part ; the second joint rela- 

 tively rather long and robust (compare the following forms), the third some- 

 what shorter and considerably more slender. A frontal plate is absent, and 

 between the antennulse, the antennse, and the labrum is found a rather large 



A 



