278 



Colours in life milky rod above, milk-white below. 



In an adult male the length of the fully extended body is 25 millim., that of 

 the larger cheliped 51 millim. 



Andaman Sea, 188-220, 250 and 2G5 fathoms ; Arabian Sea, 40G fathoms. 



6906 , m j. ,1 -x 9154 3130 3189 115 



Regd. Nos. -g- (Type of the species) : : -5- : -5- : -^. 



In the next two species, the propodites of the 3rd, and still more those 

 of the 4th, and to a certain extent those of the 2nd, thoracic -legs are dilated 

 towards the distal end, where, on the posterior border, is a prominent group of 

 spines, against which the proximal half of the dactylus can be folded after the 

 fashion of a siibchela. 



43. Munldopsls (Bathyankyristes) tenax, n. n. 



Bathyantyrlstes spinosus, Alcock, Journ. Asiatic Soc. Bengal, Vol. LXIII, pt. 2, 1894, p. 174, pi. is. fig. 2. 

 ILLUSTRATIONS OF THE ZOOLOGY OF THE INVESTIGATOR, CRUSTACEA, PLATE LV. FIG. 2. 



Carapace broad, depressed, rather broader behind than in front, but not at 

 all elliptical in shape : its surface pilose, and transversely rugose, especially on 

 the branchial regions, but not spinate. The rostrum, which is more than half 

 the length of the carapace, is stoutly styliform, upturned, and very acute. The 

 frontal margin of the carapace is slightly excavated above the eye (somewhat as 

 in Aeglea}, and almost transverse ; it is unarmed, but a little ventrad of it, 

 between the eye and the antenna, is a stout spine : the lateral margins of the 

 carapace are deeply bilobed in front of the cervical groove, each lobe ending 

 in an acute spine, and a third smaller spine occurs immediately behind the cer- 

 vical groove : the posterior border is broadly moulded, and unarmed. The 

 abdominal terga are perfectly smooth beneath a close fine pubescence, and mi- 

 grooved. 



The eyes are unpigmented : the eyestalks are not prolonged beyond the 

 cornea. The antennules have the basal joint inflated and strongly spinate. 

 All the joints of the antennal peduncle are strongly spinate, the spine at the 

 antero-external angle of the true third joint being of large size. . The expedite 

 of the 1st or anterior maxillipeds is without a flagellum. The antero-external 

 angles of the ischiopodite and meropodite of the external maxillipeds are strongly 

 spiniform, as is also the antero-inferior angle of the ischiopodite : near the middle 

 of the inner border of the meropodite is a single strong spine. The trunk-legs 

 are stout and densely hairy. The chelipeds are longer than the other legs, but 

 shorter than the fully extended body : the ischiopodite has the inner border 

 serrulate up to a distal terminal spine, and has also a distal tooth superiorly : 

 the meropodite is strongly and acutely spiny along its upper and inner, and the 

 carpopodite along its inner side, both of these joints having a distal ring of 

 spines : the hand, which is a little longer than the fingers, has a few spinules 

 35 



