igoS.] Records of the Indian Museum, 227 



pair of spinules on the upper surface is placed just in the middle 



of the telson. 



Prof. Henderson {" A Contribution to Indian Carcinology/' 



1893) describes five species observed near Calcutta and in rivers of 



India, but all seem to be different. Pal. altifrons differs by a shorter 



and deeper rostrum, that of Pal. day anus presents another toothing 



7~Q 



— ^ ; in Pal. scahriculus the four to six first teeth are situated on 



5-6' 



the carapace, Pal. dispar is probably also dift'erent and this is, of 



course, also the case with Pal. carcinus. 



9. Caridina^ sp. 



Three specimens which seem to belong either to Car. gracili- 

 rostris, de M., or to Car. gracillima, Lanch. , were gathered at Dhappa, 

 near Calcutta, in slightly brackish water. Unfortunately, the 

 rostrum is broken or incomplete at the tip and most of the legs are 

 wanting, so that it proved to be impossible to determine them 

 with certainty, 



10. Caridina propinqua, sp. nov. 

 (Plate xix, fig. 6.) 



Five specimens of different size from Dhappa, near Calcutta, 

 collected in slightly brackish water. This species is closely related 

 to Car. syriaca, Bouv., from S3^ria, and still more to Car. fossarum, 

 Heller, from Persia, but is perhaps different. 



The largest specimen is 20*5 mm. long from tip of rostrum to 

 tip of telson and all are devoid of eggs, so that these specimens are, 

 therefore, probably young. 



In the largest specimen the rostrum, which just reaches beyond 

 the far end of the second joint of the antennular peduncles, pro- 

 jects at first straight forward to the middle and then turns slightly 

 downward. The upper margin is armed with 21 rather small 

 teeth that stand until near the tip ; the three first teeth are placed 

 on the carapace. On the slightly convex median part of the upper 

 margin the teeth are placed nearer together (fig. 6) ; the penulti- 

 mate tooth is a little farther distant from the antepenultimate than 

 the preceding, and the foremost tooth is still slightly farther distant 

 from the penultimate. The distance between the foremost tooth 

 and the acute tip of the rostrum is only one-tenth the length of 

 the rostrum proper, and not yet twice as long as the distance bet- 

 ween the foremost tooth and the penultimate. The rostrum, 3-1 

 mm. long from the tip to the anterior margin of the carapace and 

 0'46 mm. broad, not yet seven times as long as broad, appears a 

 little lower (less broad) than that of Car. syriaca (Bouvier, " Obser- 

 vations nouvelles sur les crevettes de la famille des Atyides," 1905, 

 p. 82, fig. 6). The lower margin carries a single tooth that is smaller 

 than the teeth of the upper margin and placed at the anterior third 

 of the rostrum ; the anterior part of the lower margin between this 



