45 

 There are 10 specimens in the collection, registered as follows : — 



: — — — Types OF MALK. Ganjam coast, 23-26 fathoms. 



7218—19 1680 



— '-: —- — Types op female. Ganjam coast, 20-35 fathoms. ^"Investigator." 



3474 



-rrrr- Andamans, 60 fathoms. 



10 -J 



^^ Persian Gulf. W. T. Blanford. 



Atypopeneus, Alcock. 



Atypopenens, Alcock, Ann. Mag. Nat. Hist. (7) xvi. 1905, p. 524. 



Rostrum toothed dorsally only. Antero-inferior angles of carapace rectan- 

 gular. Post-antenuular sulcus not defined at all. No longitudinal or trans- 

 verse carapacial sutures. 



Antennular flagella much longer than the carapace. Bndopodite of max- 

 illules slender. Filamentous exopodites on all the thoracic legs. 



Epipodites absent from 8rd maxillipeds and last two pairs of thoracic legs. 

 No pleurobranchige on the last two thoracic somites. 



The andricum is symmetrical. 



Type Peneus compressipes, Henderson, Trans. Linn. Soc, Zool., (2) V. 1898, 

 p. 450, pi. xl. fig. 21, 22. 



As Henderson surmised, this is a unique form and is worthy of a separate 

 position. 



This genus or section includes, at present, only Henderson's Peneus com- 

 pressipes ; but two of Stimpson's species from Hongkong, viz., P. podop>hthalmiis 

 and P. stenodactylus, may possibly be assigned to it. 



Atypopeneus compressipes, Henderson, Plate IX. fig. 29, 29(1. 



Pc)i»"!ts compressipes, Henderson, Trans. Linn. Soc. Zool., (2) V. 1893, p. 450, pi. xl. fig. 21, 22. 



Rostrum short, only slightly surpassing the eyes ; armed dorsally with 8 

 teeth, and continued as a carina almost to the posterior border of the carapace : 

 the carina bears an isolated epigastric tooth, which is placed unusually far back. 

 No post-ocular spine. The post-antenuular (antennal) spine is small and has no 

 buttress, so that there is wo post-aniennular sulcus. The cervical groove is pre- 

 sent only in the immediate neighbourhood of the hepatic spine, and is there not 

 very distinct. 



The 4th-6th abdominal terga are carinated in the middle line, and there are 

 traces of a carina on the Brd also. Telson short, without lateral marginal 

 spines. 



Byes rather small, with slender stalls. Antennular peduncles slender. 



