189 

 i. Gnatkophyllum fasciolatum Stimps. PI. XVI, Fig\ 48 — 48^. 



Gnatkophyllum fasciolatum W. Stimpson, Proc. Acad. Nat. Scienc. Philadelphia, 1860, p. 28. 

 Gnatkophyllum fasciolatum J. G. de Man, Archiv f. Naturg. Bd. 53, 1888, p. 496 and in: 



Abhandl. Senckenb. Naturf. Gcsells. Bd. XXV, 1902, p. 762. 

 Gnatkophyllum fasciolatum M. J. Rathbun, in: U.S. Fish Commission Buil. for 1903, Part III, 



Wash. 1906, p. 926, fig. 74. 



Stat. 91. June 22. Muaras-reef, inner side: east coast of Borneo. 1 ova-bearing female. 

 Stat. 1S1. Sept. 5/ir. Ambon-anchorage. Reef. 2 adult males and 2 adult, ova-bearing females. 

 Stat. 213. Sept. 26 — Üct. 26. Pulu Pasi Tanette, near the North point of Saleyer-island. Reef. 

 1 female without eggs. 



According to Stimpson this species attains a length of about 20 mm., the largest of the 

 present specimens, an ova-bearing female from Amboina, measures nearly 15 mm. from tij) of 

 rostrum to tip of telson. Like in many other Caridea the development of ova takes place at 

 different ages, the egg-bearing female from Stat. 91, indeed, is only 8,5 mm. long! 



In all the specimens the rostrum, a trifle shorter than the basal joint of the antennular 

 peduncle, is armed above with f i v e teeth, not including the acute tip, and below with o n e 

 minute, almost rudimentary denticle, which is considerably smaller than the teeth on the upper 

 margin; in the largest female from Stat. 181 this denticle is as far distant from the apex as 

 the anterior tooth of the upper margin, in one male just half as far distant from the apex as 

 this tooth, while in the rest the anterior tooth is one and a half as far distant from the apex 

 as the small denticle. As was already pomted out by Richters in his description of the identical 

 Gnath. zcl>ra (in: Beitrage zur Meeresfauna der Insel Mauritius und der Seychellen, 1880, p. 162, 

 Taf. XVII, hg. 22), the i st or posterior tooth of the upper border is placed just in front 

 of the orbital margin, a character also observed in Gnath. tridens Xobili from the reefs of 

 Rikitea, hut not in Gnath. elegans (Risso) nor in Gnath. panamense Faxon. The rostrum arises 

 gradually with a rounded and obtuse carina in front of the middle of the carapace, and this 

 carina becomes gradually more compressed anteriorly; viewed at from above the rostrum looks 

 like an equilateral triangle, fiattened at either side of the median carina, the lateral margins 

 of which are rather sharp. Antennal spine well-developed. Antero-inferior angle of carapace 

 prominent, projecting a little beyond the 2 nd joint of the antennal peduncle. 



Sixth somite of abdomen little longer than 5 th . The telson (Fig. 48, 48 a) measures in 

 the adult female two-fifths the length of the carapace, rostrum included. In full-grown specimens 

 il is twice as long as wide proximally, but in the ova-bearing female from Stat. 91, which is 

 only 8,5 mm. long, it appears a little less than half as broad at base as long; width of tip 

 almost half as large as that of the base. The lateral spinules of the telson are rather large, in 

 adult individuals measuring 0,24 — 0,28 mm.; the anterior pair is usually placed on the middle 

 of the telson, the posterior at the posterior fourth, but in the male (N° 2 of the Table) the 

 anterior pair is implanted a little more backward, so that the distance between the two pairs 

 is here smaller; of the two pairs of terminal spines the longer measure s /- 8 the length of the 

 telson, the shorter 3 /. of the longer. 



Eyepeduncles robust, a little longer than the rostrum, with a black coloured tubercle 



