4i 7 



57- Alpkeus crassimanus Heller. 



Alpkeus crassimanus C. Heller, Crustaceen der Novara-Reise, 1865, p. 107, PI. X, fig. 2. 

 Alpluus crassimanus C. Spence Bate, Report Challenger Macrura, 18S8, p. 554, PI. XCIX, fig. 2. 

 Alphcus crassimanus J. G. de Man, in: Abhandl. Senckenb. Naturf. Gesells. XXV, 1902, 



p. 880, PI. XXVII, fig. 62. 

 Alphcus lobidens H. Coutière, in: Notes from the Leyden Museum, XIX, 189S, p. 199. 



Stat. 50. April 161S. Bay of Badjo, West coast of Flores. Depth up to 40 m. Mud, sand 



and shells, according to locality. 1 young male. 

 Stat. 60. April 2j 28. Haingsisi, Samau-island, Timor. Shore. 1 very young male. 

 Stat. 71. May 10 — June 7. Makassar. Depth up to 32 m. Mud, sand with mud, coral. 1 male 



and 1 ova-bearing female. 

 Stat. 86. June 18/19. Anchorage off Dongala, Palos-bay, Celebes. Shore. 3 males, 2 of which 



are very young. 

 Stat. 99. June 282930. 6°7'.5 N., I20°26'E. Anchorage off North-Ubian. 16 — 23 m. Litho- 



thamnion-bottom. 1 very young male. 

 Stat. 176. August 3031. Anchorage off Lilintah, South coast of Misool. Reef. 1 male and 



1 ova-bearing female. 

 Stat. 213. September 26 — October 26. Saleyer-anchorage and Surroundings. Reef. 1 young male. 



The specimens agree with two from Tobelo, Halmahera, desenbed by me in 1902 (l.c), 

 that are lying before me.- The largest specimens are the male long 25 mm. and the female 

 long 26 mm. from Makassar, A. crassimanus attains, however, a length of 44 mm. (de Man, l.c). 

 In the female the rostrum almost reaches to the middle, in the male just beyond the middle of 

 the visible part of fust antennular article; characteristic of this species is the narrow, compressed, 

 rostral carina, which, slightly broadening backward, is separated by deep, narrow grooves from 

 the prominent, rounded, orbital hoods; in a lateral aspect the carina is concealed by the latter. 

 In the largest male, long 25 mm., from Stat. 86 the rostrum extends almost to the end of 

 i st antennular article. 



The small chela of the male from Makassar fully agrees with Coutière's figure (Les 

 Alpheidae, 1899, p. 239, fig. 293); this chela is 9,75 mm. long, the palm just as long as the 

 fingers and 3,4 mm. high. In the largest male from Stat. 86, that has the same size as the 

 male from Makassar, both chelipeds are smaller and more slender. The small chela, 

 indeed, is only 7,5 mm. long, the palm 3,4 mm. long and 1,9 mm. high; the large chela is 



9.5 mm. long, the palm 5,5 mm. long and 3,7 mm. high, while these numbers are, for the large 

 chela of the male from Makassar, 13 mm., 7 mm. and 6,1 mm. 



The carpal segments of the second legs of the young male from Stat. 60, which is 

 13,5 mm. long, measure 0,96 mm., 0,82 mm., 0,34 mm., 0,36 mm. and 0,62 mm., the chela is 



1.06 mm. long (palm 0,52 mm., fingers 0,54 mm.). In this specimen the second segment appears 

 but a little short er than the first and this fact, combined with the measurements indicated 

 in my work of 1902, proves that the proportion between the length of the first and of the 

 second segment is variable. In the specimen from Stat. 99 which has the same size as that from 

 Stat. 60, the second segment is hardly shorter than the first. 



The two specimens from Stat. 176 are noteworthy, because the second and following 

 legs are of a somewhat stouter shape. They are only 1 5 mm. long and the ova of the female, 

 though few in number, show the same diameter (0,5 mm.) as those of adult specimens. Merus 



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