40 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXVI. 



spines 8 or 1), the posterior one situated at the anterior fourth of the 

 carapace, or further forward than in P. akaySL Ventral spines 



between the bases of the feet of 



Fig. 7. — PakapeNjEUS 

 mogiexsis, petasma, 



VENTfiAI, VIEW, < 4^. 



Fig. 8. 



-PAEAPENiErS MOGIENSIS, 

 THELYCUM, X 4^. 



the second pair rudimentar3^ The 

 sixth and seventh pleonic segments 

 are shorter than in /\ aluii/^^)!: 

 the sixth segment is about three- 

 tifths as long as 

 the carapace; 



Fig. (5.— Parapen.^us MOGIENSIS, FEMALE, xlg; ^YiQ seventh a 

 a, carapace; b, sixth segment of abdomen. 



little longer 

 than the sixth. The thelycum and petasma are dis- 

 tinctive; the right branch of the latter is very ))road 

 at the end; the left branch is pointed at the end, 



and bears a few subter- 



minal denticles. 



Dliucnslons. — Female, 



length 80.7 mm., length 



of carapace and rostrum 2t» nun., length of 



carapace IS.l mm., length of sixth pleonic 



segment, measured on median line, 11.4 



mm. 



Type locality. — Mogi, Japan (with the 

 preceding); Dr. F. C. Dale, U. S. N., U. S. S. Palos, June 18, 1881; 

 2 males, 5 females. (Cat. No. 26153.) 



PARAPENiEUS DALEI, new species. 



The rostrum is nearl}- horizontal, 



slightly convex or straight, and does not 



extend beyond the 



middle of the second 



antennular segment. 



The dorsal spines are T (exceptionally S), the pos- 

 terior one at the anterior fourth of the carapace. A 

 pair of ventral spines l)etvveen the l)ases of the feet 

 of the second pair. The 

 sixth pleonic .segment is 

 longer than in P. 'iiioylcn- 

 .s/,s', l)ut not so long as in 

 P. ul'ayebi; it is aliout 

 two-thirds as long as the 

 carapace. The left branch of the petasma has 

 a much more slender tip than in P. ■niogfcnxls., 

 and the subterminal denticles are larger. 



Dimensions. — Female, length ,57 nun,, length of carapace and ros- 

 trum 19 mm,, length of carapace 12,, 5 nmi,, length of sixth pleonic 

 segment, measured on median line, 7,9 nun. 



Fig. 9.— PakapenjEus dalei, female, 

 X Ig; a, carapace; b, .sixth segment 



OF ABDOMEN. 



Fig. 10.— Parapen.eus 



DALEI, petasma, ven- 

 tral view, ■; 44. 



Fig. n.~PARAPEN.«:us dale- 



THELYCUM, X 6§. 



