PODOPHTHALMOUS CRUSTACEA. 67 



adult specimens from the same locality , the coast of Guinea , 

 in which the larger claw is greatly longer, quite as long 

 as in Gel. Tangeri; these specimens have for the rest a 

 striking resemblance to the male which has been described 

 by Mr. Herklots and is still found in the collection. 

 But this question also remains undecided , because we have 

 no typical specimen of Gel. Tangeri. 



15. Malacosoma reticulatum n. g. n. sp. 



Malacosoma , a new genus of the family of Pinnotheridae. 

 It has the characteristic physiognomy of Pinnotheres , but 

 it differs by the structure of the external maxillipeds. The 

 second joint (ischiognathite Milne Edw.) is rectangular and 

 but a little longer than broad , the third joint (merognathite 

 M. Edw.) is quadrangular, shorter than the second, and the 

 terminal joints are afl&xed to its internal angle. The in- 

 ternal margins of the second and third joints of the exter- 

 nal maxillipeds are straight , and consequently the two ma- 

 xillipeds are lying close to each other. The exopodites 

 (exognathe M. Edw.) of these outer foot-jaws are stout 

 and almost half as broad as the third joint. The integu- 

 ment is as weak as in Pinnotheres , and therefore it is 

 possible that Malacosoma has also the same manner of life 

 as the crustaceans belonging to the group of Pinnotheres. 



Malacosoma reticulatum has a high and thick carapace ; 

 it is smooth , broader than in Pinnotheres ; the antero-lateral 

 margins arched and entire , and the postero-lateral ones 

 somewhat impressed; front very deflexed, projecting, 

 triangular with an arched anterior border; the orbits 

 and the eyes are very small , as in Pinnotheres. The 

 abdomen of the female , constituted by 7 segments , 

 is very large, as in Pinnotheres. The whole upper surface 

 and the inflexed portions of the carapace are ornamented 

 with symmetrical dark and anastomosing lines which border 

 large mashes and cause a reticulate figure. The chelipedes 

 have perished in the single specimen we have received , 



r^otes from the Ueyden ÜVIuseuia. 



