/ o 



The specimens from Stat. 240 were taken together with those of the Penaeopsis sp., 

 described p. 70. 



Penaeiis Pabiiensis Hasw. from Pahn Island is closely related, but nothing is known 

 about petasma and thelycum and the rostrum is 7 + i -toothed. 



f 29. Penaeopsis Borradailei n. sp. 



Stat. 131. July 24/25. Anchorage off Beo, Karakelang-islands. Reef, i female. 

 Stat. 193. September 13/14. Sanana-bay, East coast of Sula Besi. Reef, i female. 

 Stat. 234. November 19/20. Nalahia-bay, Nusa-Laiit-island. Reef i female. 



A new species, dedicated to Dr. L. A. Borradaile of Selwyn College, Cambridge, 

 appertaining to the Akayebi-grow^ that is characterized by the carapace being rounded behind 

 the epigastric spine, by the lateral margins of the telson being spinulose and by all the 

 pereiopods bearing an exopod. 



Carapace, telson and the shallow grooves of the abdomen very finely tomentose. Rostrum 

 distinctly ascending, reaching in the largest specimen, that from Stat. 193, to the middle of 

 2,^^ antennular article, in the female from Stat. 1 3 1 almost to the end of the peduncle, but 

 in the young specimen from Stat. 234 hardly to the extremity of the 2^'^ article. The rostrum 

 which in a lateral view appears rather narrow and tapering, is armed with 8 teeth, all situated 

 on the free part of the rostrum ; these teeth are equidistant, extend until to the tip and from 

 the 3"i and the 4"^ that are equal, decrease in size distally. The epigastric spine, a little smaller 

 than the i^' tooth of the rostrum, is situated immediately before the anterior third of the 

 carapace. Lower margin almost straight. A small, acute, orbital tooth. Antennal spine about 

 as large as the hepatic and as the branchiostegal spine, the latter situated not quite at the 

 rounded, antero-inferior angle of the carapace. 



The i^' — 4''^ abdominal terga are rounded, the 4*'^ and the 5"^ ending in two acute 

 teeth; 5''^ obtusely carinate, except the proximal fourth, 6''^ tergum rather sharply carinate and 

 terminating in a small acute tooth. Measured on the median line the 5"' .somite appears a 

 little more than half as long as the 6*, the proportion being as 4 : 7. Quite as in the Japanese 

 Pen. Dalei (Rathb.), the 6''' somite appears two-thirds as long as the length of the carapace, 

 the latter measured from between the orbital tooth and the rostrum backward; proportion 

 between the length of the 6"^ somite and its width in the middle as 7:4, just as in Pen. 

 Dalei. The lateral margins of the telson, that is slightly shorter than the 6''* somite, are 

 armed with i fixed and 3 articulate spines; the first movable spine, inserted about in the 

 middle, is half as long as the 2"<^, the 2°"^ half as long as the 3''i and the 3'^' a little longer 

 than the contiguous, fixed spine; the i^' movable spine is about 3-times as far distant from 

 the 2""^ as the 2^^ from the 3"'. Telson much shorter than the uropods. 



Third antennular article measuring two-thirds the length of the 2"**; the tapering, inner 

 (lower) flagellum is as long as the 2°'^ and 3''^ antennular articles taken together, the upper 

 flagellum, as long as the inner, is widened along two-thirds of its length, while the distal third 

 part is tapering and filiform. 



73 



SIBOGA-EXPEDITIE XXXIXC. 



