8i 

 34. Parapenaetis longipes Alcock. 



Parapcneus longipes A. Alcock, Ann. Mag. Nat. Hist. (7) XVI, 1905, p. 525 and Catal. Indian 

 Decap. Crust. Part III. Macrura. Fase. i. Calcutta, 1906, p. 33, PI. VI, Fig. 18, \%a, b. 



Stat. 2. March 8. 7°25'S., 113° 16' E. Madura-strait. 56 m. Grey mud with somc radiolariae. 



1 female. 



Stat. 47. April 8 12. Bay of Bima, near south fort. 55 m. Mud with patches of fine coral 



sand. 2 males. 

 Stat. 294. January 23. io°i2'.2S., 124° 27^3 E. Timor Sea. 73 m. Soft mud with vcry fine 



sand. 2 males, the younger of which baars a Bopyrid in the carapace. 

 Stat. 318. February 22. 6°36'.5S., ii4°55'.5E. Java Sea. 88 m. Fine, yellowish grey mud. 



2 females. 



Stat. 320. February 23. 6°5'S., ii4°7'E. Java Sea. 82 m. P'ine, grey mud. i female. 



The larger male from Stat. 294 is 65 mm. long. The rostrum, that reaches the far end 

 of the i^' joint of the antennular peduncle, just beyond the eyes, bears 5 teeth in addition to the 

 epigastric tooth, which is smaller than these teeth and the 1^' tooth is situated on the carapace. 

 The post-rostral carina is conspicuous and reaches until not far from the posterior margin of 

 the carapace. At either side of the rostrum the frontal margin is emarginate, the outer angle 

 being rather sharp. The 3"' abdominal somite is rounded, the 4''^ is carinate on three-fourth 

 parts of its length, the carina ending in a sharp tooth, as un the two following somites. The 

 6'^ somite, about twice as long as the s'^^, appears as long as the telson. The inner urópod 

 is almost as much shorter than the outer as the telson is shorter than the inner ; in Alcock's 

 ,Fig. 18 the latter appears too long. The flagellum of the outer antennae is as long as the body. 



The other male from this Station is much younger, the two lobes of the petasma are 

 not yet united with one another. The rostrum, as long as in the described specimen, is armed 

 with 6 teeth in front of the epigastric tooth. 



The larger male from Stat. 47 is 70 mm. long. The rostrum is abnormal, in regeneration. 

 The telson is slightly shorter than the 6* somite, which is twice as long as the i^^. The 2^^ 

 article of the antennular peduncle is almost twice as long as the 3'"'^; the flagella are subequal, 

 the inner, that nieasures 14,5 mm., is distinctly longer than the distance (11,5 mm.) between 

 the frontal margin and the far end of the peduncle; the proximal, widened part of the outer 

 flagellum occupies hardly one-third its length. The external maxillipeds reach the end of the 

 2^^ antennular article, the legs of the i^' pair the middle of the antennal peduncle, those of 

 the 3''<i are very slightly shorter than the external maxillipeds and the legs of the 5'^ pair 

 reach almost the end of the scales, which are a trifle longer than the peduncle of the upper 

 antennae. The legs of the i=' pair are bispinose, the following are unarmed. 



The younger male from Stat. 47 is 33 mm. long. Rosti-um reaching the end of the 

 eye-peduncles with 6 teeth besides the epigastric tooth. The 5'^ pair of legs reaches almost the 

 end of the antennal scales. 



The female from Stat. 320 is adult, 78 mm. long, somewhat larger than the described 

 males. The rostrum that is armed with five teeth in addition to the epigastric tooth, reaches 

 the middle of the 2""^ joint of the antennular peduncle and its acute tip is slightly curved 

 upward. Post-rostral carina as in the male. The carina of the 4''^ somite begins almost at the 



81 



SIBOGA EXPEDITIE XXXIX a. '• 



