Mr. E. J. Miers on the Squillidae. 123 



Gonodactylus Folinii. 



Qonodactylus Folinii, A. M.-Edwards, Nouv. Archiv. Mus. Hist. Nat. 

 iv. p. 05, pi. xviii. figs. 8-11 (1868). 



In this species the anterolateral angles of the rostrum are 

 prolonged into spines, which are shorter than the median 

 spine. The first to fifth postabdominal segments are smooth; 

 the sixth and seventh are coalescent ; the anterior portion, 

 corresponding to the sixth segment, bears four rounded tuber- 

 cles, the outer of which are three-lobed; the posterior portion, 

 corresponding to the seventh segment, has on each side a 

 longitudinal and somewhat reniform prominence, which is 

 externally convex, besides a less elevated median prominence. 

 The margin of this segment is notched posteriorly, and is 

 laterally divided into three obtuse rounded teeth. The dactylus 

 of the raptorial limbs is greatly dilated at base ; and its styli- 

 form extremity is acute, and without teeth on its inner margin. 

 Length 0*02 metre (about f inch). 



Hab. St. Vincent [Mus. Paris). 



There are in the British-Museum collection a male from 

 the Mauritius (R. Templeton, Esq.) and two small specimens, 

 without definite locality, from the ' Herald ' collection, which 

 belong to this or a closely allied form. They differ, however, 

 in the greater relative length of the antero-lateral spines of the 

 rostrum, in the less prominence of the two teeth of the pos- 

 terior margin adjoining the median notch, and the greater 

 prominence of the basal dilatation of the dactyli of the rap- 

 torial limbs. Length of the Mauritius specimen rather more 

 than | inch. 



Gonodactylus excavatus, sp. n. (PI. III. figs. 11, 12.) 



The antero-lateral angles of the carapace are prominent 

 and almost acute. The antero-lateral spines of the rostrum 

 slender, but shorter than the elongated median spine. The 

 fifth postabdominal segment is smooth and similar to the pre- 

 ceding ; the sixth is armed with six somewhat irregular longi- 

 tudinal prominences, which are separated by deep intervening 

 spaces, and are confluent clistally ; the terminal segment is 

 deeply and widely excavated posteriorly, and is armed above 

 with five prominent, smooth, longitudinal, obtuse keels, the 

 two on either side of the median one being longest, and 

 reaching to the hinder margin of the postero-lateral lobes of 

 the segment. The basal dilatation of the dactyli of the rap- 

 torial limbs is very prominent, and the styliform distal portion 

 slender and without teeth on its inner margin. Length 

 about | inch. 



