186 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 
rows of markings, each in a line half way between the median 
line and the lateral margin. Both male and female have all the 
segments and sutures outlined with a bright red line. 
Body of male narrow and elongate and arched along median 
line. Length 23 mm., greatest width 6 mm., almost four times 
longer than wide. 
Head about twice as wide as long, excavated on frontal margin 
with antero-lateral angles distinct but rounded. Posterior 
Figure 9. Pentidotea aculeata n. sp. A, first pleopod of male; B, second pleopod 
of male; C, first leg; D, second leg; E, seventh leg; F, first antenna; 
G, second antenna. 
margin slightly concave with a short red mark extending hori- 
zontally from a post-lateral position. Eyes on lateral margin 
midway between anterior and posterior margins and almost 
round in shape. First antenne possess four articles; first broad, 
almost as wide as long; following three articles not half as wide; 
second and third subequal; last clavate and slightly longer than 
the two preceding. First antenne extend to end of second article 
of peduncle of second antenne. Second antenne have a peduncle 
of five articles: first short; second and third subequal, twice as 
