curved forward-pointing tabular tooth projecting- on either side 

 of the carapace from between the large and small sub-lateral 

 tables. The sternal plastron has deep triangular pits opposite the 

 insertions of the legs. Of the pleon the second and third seg- 

 ments are much wider than the others ; the third narrows distally, 

 the sixth distally widening a little. 



The second antennae do not reach the ends of the rostral horns. 



The chelipeds are very nearly as long as the first ambulatory 

 legs^ exceeding in size those of any other species attributed to 

 this genus. The arm has three tuberculate ridges; the short 

 wrist also has three crests; the hand is as long as the carapiace 

 rostrum included, by these proportions differing from other 

 species, the ends of the thumb and finger fit closely together, the 

 inner margin of each being divided into six small teeth ; the basal 

 half of the finger has a small and a large prominence, the cavity 

 between them being filled by a tooth on the thumb, but the cavity 

 beyond the large prominence leaving a gap. In the 

 ambulatory feet the arm is longer than the hand, and 

 the finger is more than half as long as the hand, with 

 a little smooth nail, but othervvi^e thickly coated with 

 spines : the rest of tlie limb, though smoother in ap- 

 pearance, is closelv invested with the tubertuliform apically 

 pointed cutaneous vesicles described by Sars, which also occur 

 on the pleon, the mouth organs, and various parts of the body- 

 The presence of these remarkable objects is expressly noted for 

 5". carpcntcri and for S. occidcnialis, and is perhaps intended by 

 the " short felty pubescence " which Miers describes as investing 

 Pugcttia vehttina. It is not specified by Alcock either for that 

 species or for the others which he refers to S cyramathia. 



Length of carapace, 55 mm., breadth, 33 mm., length of rost- 

 rum, 14 mm. ; first ambulatory leg more than twice as long as the 

 carapace. 



Habitat. A single specimen, male, taken 28 miles oiif 

 Lion's Head, from a depth of 140 fathoms. 



The discussion of the genus, and the description of the present 

 species with the figure of it were completed before I had had an 

 opportunity of consulting Professor Chun's volume, but on seeing 

 there Doflein's figure of 6". hertzvigi, though it is unaccompanied 

 by any description, I could not resist the conviction that it repre- 

 sented the very species I had been studying. 



Cyclometopa. 



FaM. : PORTUNIDAE. 



1899. Poriitnidac, Alcock, Journ- Asiat. Soc. Bengal, vol. 68, pt. 

 2, p. 4. 



