370 Mr. 0. T. Eegan on a 



but the male still bore the right leg ; of this leg, merus, 

 carpus, palm, and tingers were respectively 7"1 mm., 10*3 mm., 

 6*4 mm., and 4-5 mm. long. According to these measure- 

 ments the leg of the second pair has probably been wrongly 

 shown in fig. 3 of plate xi. of the ' Novara-Ueise,' for in 

 that figure the chela appears once and a half as long as the 

 carpus; the palm appears probably too broad. Tlie rostrum 

 appears in that figure a little longer and more slender than 

 in our adult male, but, as has already been observed, the 

 form and the length of the rostrum are variable in our species ; 

 the fact that the lower margin bears only three teeth may be 

 a juvenile character, Heller's species being otdy 70 mm. long. 

 According to Koelbel the dactylus of the second legs should 

 carry five teeth near the articulation, the immobile finger 

 hardly traces of two, or, perhaps, three small teeth — just the 

 contrary of what is seen in our male. 



The examination of a series of specimens of different ages 

 is therefore necessary to decide this question of identity. 



Should, however, our species eventually prove to be 

 different from Fal. dance, the name of Pal. {Eupal.) novce- 

 hollandice is proposed for it. 



EXPLANATION OF PLATE XVI. 



Fiy. \. Lateral view of rostrum and carapace, X 2. 



Fig. 2. Ischium and merus, x 1 i- 



Fig. 3. Carpus and chela of the right leg of the second pair, X I5. 



Fig. 4. Fingers of the same leg, X 2. 



Fig. 0. Toothing of these fingers, X 4. 



Fig. 6. View of a part of the palm of the same leg, just in the middle, the 



inner margin being at the left hand, X 12. 

 Fig. 7. Leg of the third pair, x 2. 



LX. — DescHption of a new Cichlid Fish of the Genus 

 Heterogramma//oni Demerara. By C. Tate Regan, M.A. 



Ileterogramma steindachneri, sp. n. 



Depth of body 2| to 23 in the length, length of head 24 

 to d. Snout as long as diameter of eye, which is ?>l to oj in 

 the length of head and equal to or a little greater than the 

 interorbital width ; depth of praeorbital § to | the diameter of 

 eye. Maxillary reaching the vertical from anterior edge of 

 eye ; jaws equal anteriorly ; fold of the lower lip continuous ; 

 cheek with 3 or 4 series of scales ; not more than 5 or 6 



