Streetsia longiceps. 93 



The description of Claus being very short and the drawing not 

 very instructive, it is impossible to say anything definite about the closer 

 affinities of the species, but from the characteristics known it seems 

 most likely that it belongs to the genus Streetsia, and that it is 

 not identical with any of the above recorded species. Above (p. 90) I 

 have suggested that Oocycephaluf< longiceps of Stebbing is another species 

 than that described by Claus. 



The original diagnosis given by Claus in 1879 runs: 

 »Kopf sehr lang, mit dem rüsselförmigen Schnabel fast so lang 

 als der Mittelleib. Pigmentkörper des Auges sehr gestreckt, fast quadran- 

 gular. Beine schlank und dünn. Die Greifhand der beiden vorderen 

 Beiupaare mit scharfem, gezähneltem. Rande und einfacher, langer End- 

 spitze. Siebentes Beinpaar klein. Schwimmfüsse dünn und schmächtig. 

 Integument glatt und ziemlich dünn. Seitenflügel der Abdominal- 

 segmente unbewaffnet. Das Caudaldoppelsegment nur wenig länger als 

 die Schwanzplatte, ebenso die Stielglieder der Uropoden nicht viel länger 

 als die Aeste.» 



Colour. ? 



Length. 6 mm. (young cî, Claus). 



Hab. The Indian Ocean, Zanzibar (Claus). 



Streetsia (?) mindiin.aonis, Th. Stebbing, 1888. 



Diagn. The liead is as long as the perfeon, the pleon, and the first 

 Ural segment together; the rostrum is about half as long as 

 the rest of the head. 



The perœon is dorsally rounded. 



The first pair oï perœopoda are subcheliform; the under margin 

 of the carpus is smooth, with the hind corner a little pro- 

 jecting and sharp-pointed; the hind margin of the meta- 

 carpus is smooth; the dactylus is minute. The second pair 

 are cheliform, with the carpal process ending into a slender, 

 spine-like tooth; the front and hind margins of the carpal 

 process are serrated; the hind margin of the metacarpus is 

 finely serrated, and provided with short bristles; it is much 

 longer than the front margin of the carpal process with the 



