1917.] S. Kemp : Notes on Crustacea Decapoda. 221 



peduncle ; the fifth are longer and sometimes extend to the tip of 

 the antennal scale. 



The dorsal carination of the last four abdominal somites — the 

 chief character mentioned by Ortmann — is very conspicuous in all 

 the specimens; it cannot be confounded with the low and very 

 blunt dorsal ridge sometimes found in large examples of L.s^y/z- 

 ferus. 



The sixth abdominal somite, as in the related species, is less 

 than half the length of the carapace. I have not found any dif- 

 ferences in the telson or uropods. 



The specimens, none of which are ovigerous, were obtained at 

 Ningpo in China by Dr. B. Sing; they appear to have been found 

 in brackish water. 



Ortmann described the species from "China"; Doflein's 

 specimens were from Tsingtau. The record by Balss from Singa- 

 pore appears to me doubtful.^ 



Leander modestus, Heller. 

 (Plate ix, fig. r.) 



1865. Leandev modestns, Heller, Reise ' Novara'-Exped., Crust., p. iii, pi. x 

 fig. 6. 



The rostrum reaches beyond the antennal scale by at most 

 one fifth of its length. The basal crest is strongly elevated and 

 is furnished with from 8 to 10 evenly spaced teeth ^ of which one or 

 two are situated on the carapace behind the orbit ; the foremost of 

 the series reaches to or beyond the articulation between the second 

 and third segments of the antennular peduncle. . In front of the 

 basal crest the rostrum is straight or very slightly upturned, the 

 upper margin being invariably unarmed. On the lower margin 

 there are from 2 to 4 small teeth* which are restricted to the 

 middle third of the rostral length (pi, ix, fig. r). 



The branchiostegal spine is somewhat larger than the anten- 

 nal and is situated on the frontal margin of the carapace. Above 

 it there is a rather conspicuous longitudinal depression in which a 

 finely-cut groove, similar to that found in the preceding species, 

 may usually be detected. 



The cornea of the eye is rather strongly swollen ; a small ocellus 

 is present. 



The basal segment of the antennular peduncle is rather broad 

 and bears the usual tooth on the inferior surface ; the outer 

 margin is convex, terminating in a spine which does not reach as 

 far forward as the protruding setose antero-external portion of the 



i Balss' record of L. japoniciis from Hankow in China also seems to require 

 confirmation. 



■^ Of thirty-one specimens eight have 8 teeth on the basal crest, eighteen have 

 g and five have 10. 



2 Of thirty-one specimens three have 2 inferior teeth, twenty-four ha\e 3 and 

 four have 4. 



