884 



THE VOYAGE OF H.M.S. CHALLENGER. 



and that in this collection was dredged in the shallow Sea of Banda, off the south-western 

 coast of New Guinea, 



Procletes biangulatus, n. sp. (PL CXXVII. fig. 4). 



Carapace armed on the dorsal surface with a tooth at the posterior extremity, and 

 others on the frontal crest, continued regularly on the upper margin of the rostrum to 

 its apex. The rostrum reaches to twice the length of the carapace, and has the lower 

 margin armed with teeth corresponding to those on the upper surface. On the lateral 

 walls of the carapace are three carinas, and the frontal margin is furnished with a large 

 supraorbital tooth and a large antenna! tooth. 



The pleon has the dorsal surface armed with teeth, the third somite having two, an 

 anterior and a posterior. 



The telson is long and tapering, laterally armed with two or three small spinules. 



Habitat,— Station 191, September 23, 1874 ; lat. 5° 41' 0" S., long. 134° 4' 30" E., 

 off the Arrou Islands ; depth, 800 fathoms ; bottom, green mud ; bottom temperature, 

 39° - 5. One specimen. Trawled. 



The carapace has the dorsal surface broad and angular ; the median line is carinated 

 from the posterior margin to the rostrum, which is laterally compressed from the base to 

 the apex. The dorsal surface is armed near the posterior margin with a strong, anteriorly 

 directed tooth, whence the edge is smooth to the gastric region, where a series of small 

 regularly planted teeth commences and continues along the upper margin of the rostrum 

 to the distal extremity, as well as on the lower margin, from just beyond the extremity 

 of the ophthalmopod, posterior to which the margin is smooth. The frontal margin has 

 the orbit defined by a small orbital tooth, below which a large, oblicmely directed 

 tooth, corresponding with the second antenna, forms the anterior extremity of a small 

 but conspicuous ridge ; beneath this tooth there exists a small fronto -lateral angle. 

 Viewed dorsally the fronto-orbital region is flattened out and bounded by a ridge that 

 commences posteriorly at the pyloric region, and anteriorly terminates in a long, spine- 

 like, supraorbital tooth, that reaches nearly to the ophthalmus, and is midway armed 

 with a small tooth. Commencing at the posterior margin a lateral carina runs obliquely 



