104 A. R. S. Anderson — Beep Sea Crustacea. [No. 2, 



it is with some doubt that I assign it a place in the genus Trichopel- 

 tarion. The enlargement of the first joint of the antennal base, the 

 production of the antero-internal angle of the ischium of the external 

 maxillipeds, the absence of spines from the extremity of the merus, and 

 the obliquity of the antero-internal angle of the same joint of the external 

 maxilliped serve to separate it from Hypopeltarion at the same time 

 showing its affinity to Trichopeltarion. 



The carapace is egg-shaped, truncated posteriorly and slightly 

 flattened dorsally, where it is covered with short stiff hairs and short 

 tubercles the free extremities of which split into from 2-6 small teeth ; 

 in places the bases of two or more of these tubercles are confluent. 

 Towards the margin of the carapace these multidentate tubercles are 

 gradually replaced by conical, short, sharp spines. On the under sur- 

 face of the carapace these diminish greatly in size and on the antero- 

 internal part of the pterygostomian region become mere granules. The 

 regions are defined by sulci. 



A diamond- shaped sulcus, with its anterior extremity prolonged to 

 the base of the rostrum and its posterior extremity ending in the sulci 

 separating the median from the lateral regions, encloses about the mid- 

 dle two-thirds of the dorsum. The rostrum is similar to that of T. 

 nobile, but the tip of the central spine is broken off. It appears to have 

 been not shorter than the lateral spines. External to these three spines 

 a deep notch, in which the base of the external antenna is visible from 

 above, separates the three central from another large spine carrying a 

 small spinule on its outer side. 



From between this spine and the basal joint of the antenna 

 protrudes the eye peduncle. The external maxillipeds resemble those 

 of T. nobile except that the antero-internal border of the merus is not 

 concave, but straight although oblique. The basal joints of the 2nd 

 antennae are relatively longer than those of T. nobile. The 2nd joint 

 nearly reaches the tip of the 3 rostral spines and the 3rd joint much sur- 

 passes it. The ocular peduncle is long slender and slightly curved. 

 Both cornea? have been accidentally destroyed. The orbit is bounded 

 above by a large multicuspidate tubercle, separated by wide notches both 

 from the tubercle from beneath which the eye emerges and from another 

 multicuspidate tubercle which limits the orbit externally. 



A very broad notch again separates this latter tubercle from the 

 large spine-bearing tubercle which forms the floor of the orbit. The 

 inner margin of this tubercle is straight and almost parallel with the 

 outer margin of the first basal joint of the external antenna from which 

 it is separated by a deep notch. 



All the legs are covered with long coarse hairs, 



