NO. 1369. NATURAL HISTORY OF rilE ISOPOI).\ — J:rciIMll>S()S\ 6H9 



Fig. 16.— .Mandi- 

 ble OK ASELLCS 

 TO.MALENSIS. 



median proces.s between the antennie; lateral margins .straight, with a 

 small lobe on either side near the ba.se of the head. Eyes lateral, situ- 

 ated in the median transverse line. First pair of anten- 

 nffi reach the extremity of the peduncle of the second pair 

 of antennte; tlagellum contains about ten joints. Second 

 pair of antennte are about tvo-thirds the length of the 

 body; the flagellum consists of about tiftj'-five joints. 



The first segment of the thorax has the epimeral lobes 

 distinct and visible from a dorsal view at the antero- 

 lateral angles of the segment. In the second and third 

 segments the epimera are hilobed and occupy the ante- 

 rior portion of the lateral margins. In the fourth seg- 

 ment the epimeron is a small lobe situated at the antero-lateral ex- 

 tremity of the segment. In the fifth and sixth seg- 

 ments the epimeron is a small lobe about the middle 

 of the lateral margin. In the seventh segment it has 

 more of a posterior position on the lateral margin. 



The abdomen is broad, with the sides near!}' ])aral- 

 lel. Posteriorly it is produced in the center in a large 

 triangularly shaped lobe with rounded apex. The uro- 

 poda are slender appendages: the peduncle is some- 

 what shorter than the branches; the inner brancii is 

 about a lifth longer than the outer t)ranch. The mar- 

 gins of all the segments, the uropods, and legs are 

 fringed with hairs. 



The legs of the tirst pair are cheliform; the pro- 

 podus is elliptical in outline, with the inferior margin 

 straight. The other legs are similar and ambulatory in character. 

 The color of the species is a light brown somewhat mottled. 



Fig. 17.— LE(J of 

 first paik of 

 asellus toma- 



LENSIS. X 20i. 



Family MUNNID^E. 



MUNNA sp.? 



A very much mutilated specimen of a species of Miinna was taken 

 by the Harriman Alaska Expedition at the Prihilof Islands. The 

 Munnldai have not heretofore had any representatives from the Pacific 

 coast. Although it is very probable that the present specimen is the 

 type of a new specie.s, it is not, however, in a sufficiently complete 

 condition to warrant a description. 



