62 DR. W. E. COLLINGE ON A NEW GENUS AND SPECIES 



Haplarmadillo, Dollfus *, but differs from the first-mentioned genus in the 

 form of the cephalon and first mesosomatic segment, from the second in the 

 two-jointed fhigellum of the antennae and in only the first two metasomatic 

 appendages having pseudo-tracheae, whereas in Splueroniscus they are present 

 in all the five appendages. In Haplarmadillo the fhigellum of the 

 antennae has but a single joint and the eyes are simple. The new genus is 

 more closely related to the genus Minca, Pearse t, recently described from 

 Colombia, which possesses a two-jointed flagellum, a triangular-shaped 

 telson, and broad flat uropoda, which extend beyond the metasome. 



Paracubaris spinosus, sp. nov. (Plate 6.) 



Body oblong-oval, segments strongly convex, dorsal surface covered with 

 short blunt spines, finely granulose. Cephalon (figs. 1 & 2) short and wide, 

 with well-marked anterior and posterior margins ; cephalic lobes absent ; 

 epistome dorsally sloping from the anterior margin of the cephalon, keeled 

 in the median line, concave laterally. Eyes compound, situated dorso- 

 laterully. Antennulae (tig. 3) 3-jointed, distal joint with few stout spines 

 laterally and fine terminal style. Antennae (figs. 4 & 5) of medium length, 

 1st joint short, 2nd grooved on the outer side, 5th joint elongated ; flagellum 

 2-jointed, distal joint the smaller, with elongated terminal style. First 

 maxillae (fig. 6), outer lobe terminating in four outer, stout, curved spines 

 and eight smaller inner ones ; inner lobe terminally rounded, with two 

 spines covered with fine short setae. Maxillipedes (fig. 7), the terminal joint 

 of the outer palp is multispinous, two multispinous processes arise from the 

 middle joint, and there is a single large spine on the inner border of the 

 first joint ; the inner lobe is without teeth or spines, but has a well-marked 

 setaceous pad terminally. The segments of the mesosome are strongly 

 convex, pleural plates all slightly excavate, those of 2nd to 5th segments 

 terminally bluntly pointed, remainder truncate, posterior angles undeveloped. 

 The first segment has a slight fold on the outer margin, which ventrally 

 appears as a thickening (figs. 8 & 9). Thoracic appendages normal, enlarging 

 slightly posteriorly. Uropoda (fig. 10) extending beyond the telson ; basal 

 plate thick and flattened, with slightly raised diagonal crest, exopodite short 

 and broad, articulating with posterior inner border and extending beyond the 

 basal plate a little, endopodite long, both spinous and with small terminal 

 styles. Telson (fig. 11) triangular, terminally bluntly pointed, proximally 

 wider than the length. Length 205 mm. Colour (in alcohol) greenish- 

 brown with lateral are;is on the mesosome of brown and white mottling. 



Habitat. In decaying wood, Mazakuvi River, British Guiana, May 1916 

 (G. E. Bodkin). 



* Proc. Zool. Soc. Lond. 1896, p. 899. 



t Proc. U.S. Nat. Mus. vol. xlix. (1915) p. 544, tig. 6. 



