DESCRIPTION OF SPECIES 



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secondary edge again consists of two spines, a simple one, and a broad one which is 

 flattened and notched at the distal extremity, but not as broad as the corresponding one 

 on the left mandible. 



The outer lobe of the maxillula bears eight strong spines and a single more deUcate 

 inner one on its truncate distal extremity. The maxilla is of the ordinary type, only its 

 fixed lobe is not much broader than the articulating lobes : two long pectinate setae are 

 present on each of the articulating lobes, and six on the fixed lobe. 



The basipodite of the maxilliped is fused with the lamella as far as the articulation of 

 the endopod : the lamella is broader than long, and fringed with short setae. The first 

 joint of the endopod is short; the second is almost parallel-sided, expanding slightly at 

 its distal end ; the third is also parallel-sided, with a rounded tip bearing six setae. Setae 

 are also present along the distal half of the inner margin of the second joint and two 

 strong spines are present on the broad distal extremity of the endite. 



Fig. 8. Serolis elliplka, n.sp. 

 a, second thoracic appendage: x 70. b, fourth thoracic appendage of ?: x 85. c, uropod: x 85. 



The form of the second and fourth thoracic appendages is shown in Figs. 8 a, b. 

 The second is stoutly built, with the propodus greatly expanded and with its inner 

 margin armed with a row of about eighteen stout, modified spines, alternating with a 

 peculiar toothed and broader variety (Fig. 8 a) : the distal edge of the carpus is crenulate 

 and bears two stout spines similar to, though smaller than, the longer variety of the pro- 

 podus. The remaining thoracic appendages (Fig. 8 b) are all of approximately the same 

 size : the last pair in this species is not smaller than the rest as it is in all other species of 

 Serolis. Long plumose setae are present on the outer margins of the ischium, merus, 



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