38 DE. J. G. DE MAN ON THE PODOPHTHALMOTJS 



dentiform and obtuse. Tlie internal lobes are separated from one 

 another by a rather deep triangular incision, the internal from the 

 external by a shallower emargination. The smaller, external, 

 frontal lobes finally are separated from the obtuse, little promi- 

 nent, internal angles of the upper orbital margins by an equally 

 shallow emargination. "Whereas in Myom. granulosa, A. M.- 

 Edw., the front is armed with six lobes, the four lateral ones of 

 which are dentiform, the front of Meoi. S,ump}iii only presents 

 four lobes, of which the internal are nearly twice as broad as 

 the external, as I have already observed. Immediately behind the 

 median or internal frontal lobes, two rounded tubercles or promi- 

 nences are seen on the front, between the internal orbital angles, 

 one behind each median frontal lobe ; a little more backwards the 

 two rounded epigastric lobes are found, which are ovate, rounded, 

 and as prominent as the two lobes that lie before them on the 

 front. Immediately behind the epigastric lobes, the four proto- 

 gastric lobes are observed, which are, however, very faintly marked, 

 the grooves which«separate the internal from the external being 

 scarcely indicated. All these lobes are separated from one another 

 by the median frontal furrow, which is distinctly marked. The 

 orbits are small and round, and their upper margin presents 

 traces of two fissures. The external angle of the orbits is very 

 small, obtuse, and scarcely prominent ; as in Myom. gramdosa, 

 A. M.-Edw., it is separated by a small hiatus from a somewhat 

 larger, obtuse tubercle, which lies immediately below it, on the 

 inferior orbital margin, which is somewhat more prominent. 

 The internal lobe of the inferior orbital margin is rounded and 

 obtuse, and projects comparatively less forward than in Myom. 

 granulosa, being less prominent than the external frontal teeth. 



The antero-lateral margins, which are almost as long as the 

 postero-lateral, present four lobes behind the external angles of 

 the orbits, the two posterior of which are dentiform and slightly 

 prominent ; the two anterior, however, are broad, scarcely pro- 

 minent, and obscure. They are separated from one another 

 by rather small, shallow notches ; quite diff'erent from the 

 prominent antero-lateral lobes of Myom. granulosa, which are 

 separated from one another by deep incisions. The greatest 

 width of the cephalothorax is at the penultimate antero-lateral 

 teeth. The postero-lateral margins are oblique and straight. 



The endostome is not ridged longitudinally. The pterygosto- 



