80 THE VOYAGE OF H.M.S. CHALLENGEK. 



The ocular peduncles are long and of extreme tenuity, slightly exceeding the 

 antennular peduncle and extending for more than one-thii'd of their length beyond that 

 of the antenna, they are also slightly curved from above downwards ; the ophthalmic 

 scales are elongated, with their apices hirsute and obscurely bidentate. The antennal 

 acicle is stout and densely hirsute, extending as far as the middle of the terminal joint 

 of the peduncle, it is armed with three spinules on the inner and two on the outer 

 margin ; the external prolongation of the second joint is short and stout, with its apex 

 bidentate, the whole outer border of the peduncle is fringed with long hairs ; the 

 flagellum is sparingly ciliated and remarkably short, its total length being less than that 

 of the ocular peduncle. 



The chelipedes are similar in appearance and subequal in size, with the joints pubescent 

 and spiny. The merus has its surface almost smooth, but the upper border is armed with a 

 few spinules towards the distal end ; the car^Dus is less than half the total length of the 

 propodus, its upper surface is clad with long hairs and a few spinules are also present, four 

 prominent spines are found on tlie inner margin ; the upper surface of the propodus is 

 slightl}' convex, the lower strongly so, above there are numerous long hairs and spinules, 

 also several spines on the inner margin near the articulation with the carpus ; the fingers 

 are more than half the total length of the propodus, and both are pubescent and tubercular 

 above, even when their apices meet a considerable hiatus exists between their inner 

 margins. The ambulatory limbs have their borders, and to a certain extent the posterior 

 surface also, covered with long delicate hairs ; a few spines are present on the anterior 

 border of the carpal and propodal joints, especially the latter ; the dactyli are longer tlian 

 the propodi and their margins are densely pubescent. 



The penultimate abdominal segment bears a T-shaped impression, and the ultimate 

 segment is four-lobed. 



Length of body 18 mm., of carapace 9 mm., of chelipede 13 mm., of third right leg 

 17 mm., of ocular peduncle 4"5 mm. 



This species is characterised by its extremely slender eye-stalks, the short antennal 

 flagella, and the hiatus which exists between the fingers. 



Habitat. — Station 208, off Manila; depth, 18 fathoms; bottom, blue mud. A male 

 specimen. 



A single specimen of a Paguristes taken along with the last species is in too imperfect 

 a condition to be described in detail. The eye-stalks extend only as far as the end of the 

 antennal peduncle and are exceeded by the antennular peduncle ; the cornese are dilated; 

 the antennal acicle is long and slender, without lateral spinules. The carpus of the 

 chelipede is clothed with iridescent hairs, and two rows of curved spinules are found on 

 the upper surface ; the propodus has its upper surface tuberculate, the tubercles being 

 arranged in three rows ; there is no hiatus between the fingers. 



