176 ^^6 Philippine Journal of Science 1915 



edge deeply emarginate, leaving the whole of the base of the 

 middle tooth of the dorsal series pale. 



In regard to structural features it may be mentioned that 

 young males invariably possess 6 teeth on the raptorial claw, 

 the posterior one being very small and lying close against the 

 next of the series. In all the other larger specimens there are 

 only 5 teeth. The penultimate tooth is invariably shorter than 

 the antepenultimate, and the large angular lobe at the base 

 of the dactylus on its outer side — one of the most characteristic 

 features of the species — is well shown in all the specimens. 

 In the middle of the distal margin of the telson, between the 

 movable submedian denticles, there are 3 or 4 pairs of spinules. 



There are no marked structural distinctions between adult 

 males and females. 



Lysiosquilla vicina Nobili. Plate I, figs. 4-8. 



Lysiosquilla vicina NOBILI, Bull. Mus. Hist. Nat. (1904), 10, 229; 

 Nobili, Ann Sci. Nat. Zool. (9) (1906), 4, 339; Kemp, Mem. Ind. 

 Mus. (1913), 4, 126. 



No. 0-840. Port Galera, Mindoro, "Dug .while hunting Balanoglossus 

 near camp." (Griffin and Wharton) , June 13, 1912, 2 c?, 29 and 32 mm. 



In the same bottle with the specimens of L. multifasciata 

 were 2 examples of this species, hitherto known only from a 

 single mutilated individual obtained in the Red Sea. These 

 specimens have enabled me to supplement Nobili's account in 

 several particulars and to supply figures of the species. 



The rostrum (fig. 5) is one and a half times as broad as 

 long and is remarkable for the fact that it terminates anteriorly 

 in 3 spines, a character found only in one other species of the 

 genus: namely, L. digueti Coutiere. The median spine extends 

 little beyond those at the lateral angles and fails to reach the 

 cornea of the eye. The anterior margin on either side of the 

 median spine is deeply concave. In dorsal view the spines of 

 the antennular somite are completely concealed by the rostrum. 



The eyes are short and rather broad; the cornea is not def- 

 initely divided into 2 lobes and is hardly wider than the stalk. 



The antennular peduncle extends beyond the eye by the length 

 of its distal segment. The antennal peduncle scarcely reaches 

 the end of the eyestalks. As in L. multifasciata and several 

 other species of the genus the antennal protopodite bears on its 

 ventral surface a single soft elongated papilla. 



The mandibular palp is composed of 3 segments. 



The raptorial claw (fig. 6) somewhat resembles that of L. 

 tigrina and is much more slender than that of L. multifasciata. 



