In a young specimen, finally, long 11,5 mm., from Stat. 282 the rostrum reaches almost 

 to the end of the i^' antennular article and appears distinctly longer than the orbital spines, which, 

 like in other specimens, are directed straightly forward. The visible part (0,48 mm.) of i^' article 

 is but little more than half as long as the 2"^ (0,84 mm.). As regards the legs of the i^' pair, 

 I must remark that the inner margin of the merus of both legs, in the male and in the female, 

 bears 5 — 7 small, movable spinules and that it terminates in a small, acute tooth; the inner 

 margin is also setose. The slightly setose, inner surface of the larger chela is marked with 

 small, violet spots at the insertion of the hairs. 



As is proved by the preceding description this species is somewhat variable as regards 

 the length of the rostrum, the direction of the orbital spines, the length of the articles of the 

 antennular peduncle and that of the scaphocerite. 



Remarks. A. detiterop7is Hilgd. and A. paradentipes Cout. are the most closely related 

 species. I have never seen specimens of A. detderoptcs^ but the dactyli of the three posterior 

 legs are simple, not biunguiculate, the inner margin of the merus of the chelipeds bears no tooth 

 and the fingers of the smaller chela are much shorter than the palm. The chela which was 

 described by Hilgendorf, seems to be the smaller, while the larger was figured by Coutiere 

 (Les "Alpheidae", 1899, p. 215, Fig. 254, 255). 



General distribution: Japan, Kagoshima (Ortmann); Bonin Islands (Stimpson); 

 Funafuti (Borradaile) ; New Caledonia (Coutiere) ; Murray Island, Torres Strait (Coutiere) -, 

 Tague Island (Coutiere) ; Maldive and Laccadive Archipelago (Ortmann, Coutiere) ; Djibouti 

 (Coutiere). 



4. Alphetis paradentipes Cout. 



H. Coutiere, Alpheidae Maid, and Laccad. Archip. 1905, p. 880, Pi. LXXIV, fig. 17. 



Stat. 279. January 11/13. Rumah-Kuda-bay, Roma-island. 36 m. Mud and sand, i young 

 specimen. 



In this specimen, which is 9 mm. long, the rostrum reaches to the middle of the visible 

 part of i^' antennular article and is slightly shorter than the orbital spines, which are directed 

 straightly forward. The visible part (0,42 mm.) of i*' article is but little shorter than the 2°'^ (0,5 mm.) 

 and the 3'''^ article is hardly as long as the visible part of the i^'. Stylocerite pointed, reaching 

 almost to the end of i*' article. Scaphocerite extending almost to the end of 3'''^ antennular 

 article, the blade which is fringed with feathered hairs, reaches to the end of the 2"^^ joint, 

 while the carpocerite appears also a little shorter than the peduncle of the upper antennae; 

 spine on the basicerite small, much shorter than the orbital spines. Inner margin of the merus of 

 the larger (left) cheliped with 6, that of the smaller with 4 small, movable spinules and terminating 

 in an acute tooth in both legs. Larger chela 3-times as long as high, smooth and glabrous 

 on both sides. 



Carpal segments of the left leg of the 2"^^ pair 0,7 mm., 0,47 mm., 0,28 mm., 0,26 mm., 

 and 0,4 mm. long, chela 0,78 mm. long (palm 0,36 mm., fingers 0,42 mm.). Ischium of 3"^ and 

 4'^^ legs with a strong, movable spine. Merus of 3''^ legs 1,8 mm. long, 0,29 mm. wide in the 



204 



