4i8 



of second legs 5-times as long as broad, in the adult specimens from Stat. 71 6,4-times. Carpal 

 segments in the female i mm., 0,7 mm., 0,3 mm., 0,3 mm. and 0,5 mm. long, second segment 

 hardly 3-times as long as thick in the middle, third segment hardly longer than thick; chela 

 I mm. long (palm 0,54 mm., fingers 0,46 mm.). In the male the merus of second legs is 5,3- 

 times as long as broad, the carpal segments are 0,88 mm., 0,78 mm., 0,26 mm., 0,28 mm. and 

 0,44 mm. long, second segment 3,45-times as long as thick, third segment 0,23 mm. thick; 

 chela 0,92 mm. long (palm 0,5 mm., fingers 0,42 mm.). In the adult specimens from Stat. 71 

 the second seo-ment is 3,7-times and the third one and a half as long as thick. 



Merus of third legs in the male 3,6-times, in the female 3, 3-times as long as broad, 

 its shape being stouter than in full-grown specimens, in which this joint is 4,7-times as long 

 as broad (de Man, I.e. p. 883); as regards the following joints the specimens from Stat. 176 

 agree with the adult. 



Remarks. Through the kindness of Dr. Horst of the Leyden Museum I was enabled 

 to study the female from Amboina which was referred by Coutiere to A. lobidens de Haan : 

 this female proved to belong to A. crassinianns. (Vide also p. 328, footnote). 



General distribution: Nicobar Islands (Heller); Djibouti (Coutiere); Amboina 

 (de Man); Ternate (de Man); Tobelo and Kau, Halmahera (de Man). 



758. Alpheus pareitchirus Cout. 



Alpheus pareuchirus H. Coutiere, Alpheidae Maid, and Lace. Archip. 1905, p. 906, PI. LXXXIV, 

 fig- 43- 



Stat. 51. April 19. Madura-bay and other localities in the southern part of Molo-strait. 54 — 90 m. 



Fine grey sand; coarse sand with shells and stones. 14 specimens of different size. 

 Stat. 99. June 28/29/30. 6°7'.5 N., 120° 26' E. Anchorage off North-Ubian. 16 — 23 m. Litho- 



thamnion-bottom. 4 specimens. 

 Stat. 109. July 5/6. Anchorage off Pulu Tongkil, Sulu-archipelago. 13 m. Lithothamnion-bottom. 



I young specimen. 

 Stat. 164. August 20. i°42'.5S., i30°47'.5 E. Between Misool and New Guinea. 32 m. Sand, 



small stones and shells, i young male and i younger specimen. 

 Stat. 260. December 16 and 18. 5°36'.5S., I32°55'.2E. — 2,3 miles N., 63° W. from the 



North point of Nuhu Jaan, Kei-islands. 90 m. Sand, coral and shells, i female. 

 Stat. 274. December 26. 5°28'.2S., I34°53'.9E. East coast of Jedan-islands. 57 m. Sand and 



shells. Stones. 2 specimens. 

 Stat. 303. April 27/28. Haingsisi, Samau-island near Timor. 36 m. Lithothamnion. 6 specimens. 



These specimens, in the largest of which, males and ova-bearing females, the carapace is 

 5V mm. loner, agree pretty well with Coutieke's description and figures, except that the triangular 

 oTOOve on the inner side of the palm of the large chela, which in the typical specimens should 

 be "tres faiblement marquee", appears well marked, as deep as the groove on the 

 outer side and with its lower border quite distinct and often coloured. 



In the adult male from Stat. 99 the merus of the larger cheliped is 2,6-times as long 

 as broad in the middle and the merus of the smaller fully resembles it. The chela appears 

 a little hi a her in proportion to its length than in the younger specimens, described by 

 Coutiere, the proportion being 2,67, but in a younger male from Stat. 51 like also in the females 



286 



