JOURNAL OF ENTOMOLOGY AND ZOOLOGY 187 
long as first; fourth not quite twice as long as third; fifth slightly 
longer than fourth; flagellum consists of seventeen or eighteen 
articles. Maxillipeds have a palp of five articles. 
Sides of thorax almost parallel in male. All but first segment 
have epimera which extend to end of posterior margin. HEpimera 
of second and third and fourth segments about equally wide from 
anterior to posterior margins. Fifth, sixth and seventh much 
narrower at anterior than at posterior margin. Legs alike in 
structure. 
Ni 
ie 
Cc 
Figure 10. Pentidotea aculeata n. sp. A, mandible; B, maxilliped; C, opercular 
valve; D, second maxilla; KE, first maxilla. 
Abdomen 8 mm. long, 4 mm. wide at anterior end; composed 
of two short segments, a partially coalesced and a long terminal 
segment; the latter narrow and slightly excavate on the lateral 
margins, prolonged at median posterior extremity into a pro- 
nounced tooth, 1 mm. long. Post-lateral angles rounded. Oper- 
cular valves composed of a long anterior and a short posterior 
part. Carina not apparent on anterior portion. 
The above description applies only to the male. Along with 
these a number of other specimens, all females, were collected 
which are slightly different in shape: have lateral margins less 
